Cadillac Owners Group - HT4100 4.1, 4.5, 4.9 http://www.cadillacforums.com/forums This forum is to discuss the newer aluminum block Cadillac engines. en Sat, 21 Nov 2009 00:13:55 GMT vBulletin 60 http://www.cadillacforums.com/forums/images/misc/rss.jpg Cadillac Owners Group - HT4100 4.1, 4.5, 4.9 http://www.cadillacforums.com/forums 1984 Coupe Engine Oil Cooler lines http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185212-1984-coupe-engine-oil-cooler-lines.html Thu, 19 Nov 2009 22:05:01 GMT Hello all- I am working on a 1984 Coupe Deville with a 4100, rear wheel drive. The engine oil cooler lines are rotted, the ones that go to the radiator to the engine. Does anyone know where I... Hello all-

I am working on a 1984 Coupe Deville with a 4100, rear wheel drive.

The engine oil cooler lines are rotted, the ones that go to the radiator to the engine. Does anyone know where I can obtain some new or good used ones? I tried GM and they do not have any and they searched their database.

Any help is appreciated. I want to get back on the road!

Lenny ]]> HT4100 4.1, 4.5, 4.9 olds55 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185212-1984-coupe-engine-oil-cooler-lines.html E48 Code- EGR FAULT http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185136-e48-code-egr-fault.html Thu, 19 Nov 2009 02:03:17 GMT I have a egr fault code, when i ran my diagnostic and i'm having a rattle when accelerating, could that a bad egr cause it to rattle when accelerating? ]]> HT4100 4.1, 4.5, 4.9 JoJo_Brand_Star http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185136-e48-code-egr-fault.html Injector cleaner, will it work? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185111-injector-cleaner-will-work.html Wed, 18 Nov 2009 21:33:56 GMT Hi My 36k mile 1994 DeVille has kinda rough idle, according to the shop manual the only cause of this is clogged injectors. Not unlikeliy since the PO was 70 when he purchased the car and had it... Hi

My 36k mile 1994 DeVille has kinda rough idle, according to the shop manual the only cause of this is clogged injectors.
Not unlikeliy since the PO was 70 when he purchased the car and had it until his passing this spring, I guess only litle trips to the mall has been made.
So the big Q is if the liquid injector cleaners will work, or if another approach must be made?

Regards
Lars ]]> HT4100 4.1, 4.5, 4.9 Lars Langoy http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185111-injector-cleaner-will-work.html 4.9 ping!!! http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185061-4-9-ping.html Wed, 18 Nov 2009 04:01:13 GMT 95 SDN DEVLLE. pings when i accelerate,93oct. premium fuel since day 1 timed an tuned a year ago. thanks in advance for any info 95 SDN DEVLLE. pings when i accelerate,93oct. premium fuel since day 1 timed an tuned a year ago. thanks in advance for any info ]]> HT4100 4.1, 4.5, 4.9 rick davenport http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185061-4-9-ping.html 1990 Seville enginemiss http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185054-1990-seville-enginemiss.html Wed, 18 Nov 2009 02:40:39 GMT I have a 90 model seville with the 4.5 engine. While stopped in traffic I noticed the engine was misotice at highway sing. It misses at idle and low speeds. Do not notice at highway speeds. I have... I have a 90 model seville with the 4.5 engine. While stopped in traffic I noticed the engine was misotice at highway sing. It misses at idle and low speeds. Do not notice at highway speeds. I have replaced the plugs and wires, added fuel additives, cleaned the os sensors, dist cap. But the miss is still there. All the injectors seem to be working according to the mechanic. However he said it was getting to much fuel. The new plugs are already sooted up as is the o2 sensors. The converter is also getting red hot. I am almost broke and cannot afford to do anymore process of elimination repairs. The only code I am getting is a 0048 or it may have been 0049. I still have the car @ the shop and cant check it. Any help would be great, thanks!!! ]]> HT4100 4.1, 4.5, 4.9 robbie109 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185054-1990-seville-enginemiss.html 1990 4.5 intake gaskets http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185003-1990-4-5-intake-gaskets.html Tue, 17 Nov 2009 15:27:22 GMT Before I got sick last week with pneumonia, I started replacing the intake gaskets on a 4.5 . Here's a picture of a 170,000 mile 4.5 with the intake manifold and valve covers removed.



Unfortunately, it's been sitting in this state since Friday and the doc says I won't be good to go until later this week. I'll take more pictures when I'm able to wrap it up. ]]> HT4100 4.1, 4.5, 4.9 drewsdeville http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/185003-1990-4-5-intake-gaskets.html Cadillac Deville 4.9l Engine Problem http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184858-cadillac-deville-4-9l-engine-problem.html Sun, 15 Nov 2009 21:14:26 GMT I just finished getting my engine back together after having to put two helicoils into my rear head. Now that the engine is back together, when I attempt to start it, it does not turn over. Smoke... I just finished getting my engine back together after having to put two helicoils into my rear head. Now that the engine is back together, when I attempt to start it, it does not turn over. Smoke comes out of my intake throttle body when attempting to start. Any ideas on what my issue may be, ways to troubleshoot, or issues that would cause this type of problem.

I numbered my spark plug wires so they are in the correct order
I did not take the engine out of the car
I was forced to take the distributor apart and put back together
I replaced the water pump
I replaced all gaskets down to the heads
All head bolts, rocker arms were torqued to spec

Any ideas on where I should look or is it best to just take the engine back apart and see if anything broke from when I first attempted to start it? If I take everything apart and nothing is broken, I will be in the same place I'm in now. ]]> HT4100 4.1, 4.5, 4.9 beveluv http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184858-cadillac-deville-4-9l-engine-problem.html 4.1 L digital engine http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184794-4-1-l-digital-engine.html Sun, 15 Nov 2009 01:32:53 GMT I am about to close a deal on a 1985 Fleetwood Brougham with a 4.1 L digital engine under the hood...I am hearing a lot of good stuff but mostly negative things about this engine...The vehicle has... I am about to close a deal on a 1985 Fleetwood Brougham with a 4.1 L digital engine under the hood...I am hearing a lot of good stuff but mostly negative things about this engine...The vehicle has 76K on it and runs good....Anyone got any comments either bad or good to asy...I need to know what to do Buy or not to Buy...?:bonkers: ]]> HT4100 4.1, 4.5, 4.9 19cadillac85 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184794-4-1-l-digital-engine.html 4.1 Motor? Rattles/Engine Pinging? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184715-4-1-motor-rattles-engine-pinging.html Fri, 13 Nov 2009 19:47:57 GMT I don't know what's the deal with my 87, it runs perfectly fine and it starts up without any hesitation. I figure the noise may be because of a bad cat, but it only make a rattling noise when i accelerate.
Now question is, what could that possibly be?
Someone told me it could because of bad gas, i'm not to sure what the case may be.
But if it is bad gas, where would be the best place to get gas from, I understand it uses regular unleaded fuel.

So please, if anybody know what could be the issue with the rattling,i need help. lol ]]> HT4100 4.1, 4.5, 4.9 JoJo_Brand_Star http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184715-4-1-motor-rattles-engine-pinging.html 4.9L head bolts 1993 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184694-4-9l-head-bolts-1993-a.html Fri, 13 Nov 2009 14:50:36 GMT Hello, I am the proud owner of a 1993 deville which has heads off for new gasket but can not find new, of any manufacture, replacement bolts. Is there anyone who can tell me of a source for these... Hello, I am the proud owner of a 1993 deville which has heads off for new gasket but can not find new, of any manufacture, replacement bolts. Is there anyone who can tell me of a source for these bolts.
Thanks, tom ]]> HT4100 4.1, 4.5, 4.9 tlbaker http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184694-4-9l-head-bolts-1993-a.html P048 EGR code on 4.9L http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184624-p048-egr-code-4-9l.html Thu, 12 Nov 2009 16:11:17 GMT so I started it up and lifted the EGR valve diaphragm and the car almost stalled which is the expected result according to my haynes book. But which is the EGR solenoid? Is it the unit on the... so I started it up and lifted the EGR valve diaphragm and the car almost stalled which is the expected result according to my haynes book.

But which is the EGR solenoid? Is it the unit on the left in the pic, above the blue sensor connector, with a vac hose running right to the EGR valve? I checked that and it has vacuum to it on the left side. But no vacuum coming out the right side going to the EGR valve. Maybe that is expected.

Anyways, I'm getting cruddy gas mileage so I'm thinking this is all related.
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]]> HT4100 4.1, 4.5, 4.9 primerib http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184624-p048-egr-code-4-9l.html What gives? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184526-what-gives.html Wed, 11 Nov 2009 03:24:10 GMT Occasionaly,my 92 Eldo,4.9 will heat up to 230º briefly and drop right back down to 198º-207º in a mater of seconds.I live in AZ and run the A/C continuosly in the summer with no cooling... Occasionaly,my 92 Eldo,4.9 will heat up to 230º briefly and drop right back down to 198º-207º in a mater of seconds.I live in AZ and run the A/C continuosly in the summer with no cooling problems.Have been told the fluxuating was no problem,but watching the digital dash read out drives me nuts, as you can watch each degree of change.Should I panic or not? ]]> HT4100 4.1, 4.5, 4.9 whereto http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184526-what-gives.html The Best Kind of Motor Oil For 87 Deville HT4100 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184509-best-kind-motor-oil-87-deville.html Wed, 11 Nov 2009 00:36:24 GMT I have a 1987 Cadillac Sedan Deville w/ 81,000 miles, and it's in showroom condition and i have owned for 2 months now.
And i have plans for her, but i would like to get some recommendations on what is the best motor oil product, to use on a 4.1 Motor? In another 500 miles, it's gonna be time for an oil change, and i refuse to take it to jiffy lube and put just anything in her.
I also hear that, Amsoil motor oil is the best product to use on an Ht4100. ]]> HT4100 4.1, 4.5, 4.9 JoJo_Brand_Star http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184509-best-kind-motor-oil-87-deville.html i have code E52 - PCM Memory Reset how do i do this ? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184508-i-have-code-e52-pcm-memory.html Tue, 10 Nov 2009 23:27:24 GMT hi ive got my cadillac running but not well and did the fault codes and it came up this E52 - PCM Memory Reset how do i do this in my hanyes manual it said ecm fault :confused: but just looked on... hi ive got my cadillac running but not well and did the fault codes and it came up this E52 - PCM Memory Reset how do i do this in my hanyes manual it said ecm fault :confused: but just looked on here and says this ?

thanks for any help its a 84 4.1 deville by the way thanks again for any help ]]> HT4100 4.1, 4.5, 4.9 simon_84deville http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184508-i-have-code-e52-pcm-memory.html Gas mileage gone to hell http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184454-gas-mileage-gone-hell.html Tue, 10 Nov 2009 05:27:24 GMT Ok, so I burned 6L on a 15k trip today, sooooo SOMETHING is ****ed. I was told it could be the FPR, but could it make that big of a difference? Any feedback would be great. In the past I was... Ok, so I burned 6L on a 15k trip today, sooooo SOMETHING is ****ed. I was told it could be the FPR, but could it make that big of a difference? Any feedback would be great. In the past I was getting 30 mpg, so something is messed. ]]> HT4100 4.1, 4.5, 4.9 V-Eight http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184454-gas-mileage-gone-hell.html idle faster after change timming http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184445-idle-faster-after-change-timming.html Tue, 10 Nov 2009 03:53:15 GMT i have 1995 devile, yeterday i adjust my timming from 8 degree advance to 10 degree advance. .it do got more power as i feel,but it run faster at idle,is this normal? as i know if it runs faster... i have 1995 devile,
yeterday i adjust my timming from 8 degree advance to 10 degree advance.
.it do got more power as i feel,but it run faster at idle,is this normal?
as i know if it runs faster at idle,it will consume more fuel, right?
any help appreciate ]]> HT4100 4.1, 4.5, 4.9 markleeblue http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184445-idle-faster-after-change-timming.html 4.9 Power Steering Pulley Slipping http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184435-4-9-power-steering-pulley-slipping.html Tue, 10 Nov 2009 02:43:09 GMT I am having power steering trouble again. I replaced the pump a few months back, after several weeks the pulley started slipping off and I lost steering, I got the pulley install tool and pushed it... I am having power steering trouble again. I replaced the pump a few months back, after several weeks the pulley started slipping off and I lost steering, I got the pulley install tool and pushed it back on, that lasted a few months until today, on the way to work I heard a snap, when I pulled into the parking lot I heard and felt the pulley slip. I got the tool again and cant get the pulley back on. I pushed it on by hand but as soon as i start the car it slips off to the end of the shaft, but not completely off. The car is stuck at work now so it is harder to work on.

I heard that you can install a screw with washers into the pulley to help hold it on, anyone ever try this? I am going to try to get it on tomorrow so I can atleast get it home from work.

Does it sound like I am not getting the pulley on tight enough, or does it sound like something else is messed up? ]]> HT4100 4.1, 4.5, 4.9 behind-bars http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184435-4-9-power-steering-pulley-slipping.html 4.9 Upper a/c compressor bracket http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184425-4-9-upper-c-compressor-bracket.html Tue, 10 Nov 2009 00:55:27 GMT Does anyone have a picture or diagram of the bracket that mounts from the top of the a/c compressor to the P/S pump bracket? Does anyone have a picture or diagram of the bracket that mounts from the top of the a/c compressor to the P/S pump bracket? ]]> HT4100 4.1, 4.5, 4.9 Sevillian273 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184425-4-9-upper-c-compressor-bracket.html 4.9 knock http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184272-4-9-knock.html Sat, 07 Nov 2009 21:23:53 GMT 95 Sedan Deville with 4.9. 85K miles. Seems to knock under acceleration. Is this what I'm hearing, or could it be somethiung else? ]]> HT4100 4.1, 4.5, 4.9 rivrboat http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184272-4-9-knock.html high fuel consumption..? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184191-high-fuel-consumption.html Fri, 06 Nov 2009 19:09:44 GMT During cold weather the fuel consumption went up a lot. Diagnostics showed lambda sensor fault. Changed it, but fuel consumption is still 18-20l/100km. All diagnostics still say that it is lambda... During cold weather the fuel consumption went up a lot. Diagnostics showed lambda sensor fault. Changed it, but fuel consumption is still 18-20l/100km. All diagnostics still say that it is lambda sensor fault, but I have already changed a couple of them

deville 87-4.1l ]]> HT4100 4.1, 4.5, 4.9 leek http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184191-high-fuel-consumption.html 4.9 issue... http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184155-4-9-issue.html Fri, 06 Nov 2009 03:57:32 GMT Hello, I have oil and thick puffy smoke coming out of my exhaust system... Heads were changed a little over a year and a half ago and the car has been running fine ever since with no issues. I... Hello,

I have oil and thick puffy smoke coming out of my exhaust system... Heads were changed a little over a year and a half ago and the car has been running fine ever since with no issues. I recently got the compressor replaced and started using the a/c. Then the car randomly overheated around 6 months later. I shut the engine off and released the pressure from the radiator and couldn't find any leaks. It started up fine and ran good for about a week afterwards...

I put it in the shop when I got back home (from out of town) (The car sat up for around a week at the airport) before all of the chaos started just for a checkup. Thinking that the water pump circulation levels were low. The upper rad hose that goes to the thermostat would get warm. The lower side hose and tank would always stay empty and cool. The mechanic told me it was running fine and it was just low on fluid... Me being the person I am. I go change the pump,thermostat, & cap.. Total of around 70 bucks and 2 days off an on worth of work, no big deal.

So today I start it up... it cranks fine idling smooth. First time I'd started it all day... texas weather is around 55 degrees. I go less than .5 of a mile and it kills on me. Won't turn over without serious amounts of gas being applied to the pedal too. I get it started back up and moving.. Pull over to the parking lot and there's the gas/oil/antifreeze I guess mixing in the heads causing this HUGE ass cloud of smoke immediately upon start up... The car idles really low at around 400RPM and sounds like it's missing. But it doesn't kill. I let it sit for around 45 minutes.. I get a tow home. Engines cooled down by then. I start it up... No problems with cranking it now, but the thick ass smoke cloud returns...

I know something is mixing in the head and probably getting to the plugs which is why it's blowing out of the exhaust. I need an expert decision on whether or not to keep throwing money into this abyss though.

Only reason why I have this car is because it's my deceased brothers.. It's a project car to me. Fiberglassing a/b pillars, door panels, customer interior etc... I have quite a bit of money tied up into it to keep it running and looking good. I just need to know if it's worth fixing... OR if the mechanic that fixed it the first time even did what he was suppose to do correctly. My cost for new heads would be around 1100, the car has a hair over 143,000 miles on it...


In need of serious advice please anyone!

Thank you for your time.

Also... Is it worth doing a rebuild on these engines? Or would someone just recommend a swap? ]]> HT4100 4.1, 4.5, 4.9 soulman07 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184155-4-9-issue.html Drive belt routing for 4.9L ??? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184126-drive-belt-routing-4-9l.html Thu, 05 Nov 2009 19:30:56 GMT So I'm putting my 95 Deville 4.9L back together after the power steering bracket broke on me. But my car is missing the belt routing diagram under the hood. Anyone have access to or point me to the belt routing? ]]> HT4100 4.1, 4.5, 4.9 primerib http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184126-drive-belt-routing-4-9l.html 92 STS Electrical Short or Drain http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184092-92-sts-electrical-short-drain.html Thu, 05 Nov 2009 03:36:52 GMT Ok i am lost on this one. 92 Sts Sevill with 4.9 49k miles. no problems until few weeks ago go out to get in and go and battery dead. charge battery. nothing start pull hot wire off battery died. ... Ok i am lost on this one. 92 Sts Sevill with 4.9 49k miles. no problems until few weeks ago go out to get in and go and battery dead. charge battery. nothing start pull hot wire off battery died. go buy new battery new alternator 2 days dead. electric trunk lock broke on trio home from alabama done some rigging got it to latch. unplug wiring harness. unplug power antenna , unplug airride suspension. has one aftermaket strut that was on it when bought car last year. no lights are on check in dark no fuses hot control pannel keys out. been going on a month and totally lost. give me something to look for. the body is the new design like 93 and so on.

thanks for your help.

jeremyb634@msn.com ]]> HT4100 4.1, 4.5, 4.9 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/184092-92-sts-electrical-short-drain.html where to buy mounting bracket for PS pump? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183978-where-buy-mounting-bracket-ps-pump.html Tue, 03 Nov 2009 22:16:44 GMT car: 95 Deville 4.9L

My son calls, said the power steering must be empty, can barely turn the wheel, then it just won't start. Weird. I get there, the drive belt is off (so no PSteering or alternator. LOL). Upon more research, the bracket that holds the power steering pump (and I think also holds the belt tensioner) broke. (see pic). Where can I get one of these?
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]]> HT4100 4.1, 4.5, 4.9 primerib http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183978-where-buy-mounting-bracket-ps-pump.html 1993 Sedan Deville Transmission Swap http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183963-1993-sedan-deville-transmission-swap.html Tue, 03 Nov 2009 20:48:51 GMT Hello, I recently purchased a 1993 Sedan Deville and I need to swap out the transmission. I plan on pulling out a transmission from a junkyard/u-pull it type place. I was hoping somebody could... Hello,

I recently purchased a 1993 Sedan Deville and I need to swap out the transmission. I plan on pulling out a transmission from a junkyard/u-pull it type place. I was hoping somebody could tell me what transmissions are compatible w/ a 1993 Sedan Deville. I'm pretty sure the 91-93 devilles will all work, but I was hoping I might have some more options as well. Thanks for your help. ]]> HT4100 4.1, 4.5, 4.9 truggenberg http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183963-1993-sedan-deville-transmission-swap.html rpm question http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183922-rpm-question.html Tue, 03 Nov 2009 14:03:03 GMT ok i was looking at my rpms why i was siting in park or any other gear the rpms will go from 600 to 750 while ideling ok i was looking at my rpms why i was siting in park or any other gear the rpms will go from 600 to 750 while ideling ]]> HT4100 4.1, 4.5, 4.9 mikeman711 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183922-rpm-question.html <![CDATA[Code 26 & 41 '91 4.9]]> http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183913-code-26-41-91-4-9-a.html Tue, 03 Nov 2009 08:16:48 GMT I'm getting my '91 ETC ready for the dreaded California smog test and I have a SES light one for
26 - Shorted TPS Circuit
41- Cam Senser circuit
How do I go about fixing these? ]]> HT4100 4.1, 4.5, 4.9 STS_Seville_Hunter http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183913-code-26-41-91-4-9-a.html Question re: engine swap for 85 FW coupe RWD http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183910-question-re-engine-swap-85-fw.html Tue, 03 Nov 2009 07:02:25 GMT Just picked up a 1985 Fleetwood coupe RWD with a blown engine. Now for the question....Can I use an engine from a 1997 Chevy 1500 P/U 8 cylinder. Will this engine and possibly the tranny bolt right... Just picked up a 1985 Fleetwood coupe RWD with a blown engine. Now for the question....Can I use an engine from a 1997 Chevy 1500 P/U 8 cylinder. Will this engine and possibly the tranny bolt right in with no modifications. What about the computer, do I need to change the existing Caddy computer to the Chevy. Thanks for the advice.......Can't wait to get this beast on the road with the whole 90 package on it..... ]]> HT4100 4.1, 4.5, 4.9 SCU187 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183910-question-re-engine-swap-85-fw.html 1993 Cadillac DeVille 4.9L Distributor Shot http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183882-1993-cadillac-deville-4-9l-distributor.html Tue, 03 Nov 2009 00:11:35 GMT So for the past 6 months to a year, I have had a slight misfire (more of a car jerk at idle speeds) turn into a nasty misfire accompanied by vibration and poor fuel economy. I also get poor... So for the past 6 months to a year, I have had a slight misfire (more of a car jerk at idle speeds) turn into a nasty misfire accompanied by vibration and poor fuel economy. I also get poor acceleration but occasionally, it will run fine. I'd say 1/15 times I drive it. I had a diagnostic done at tires plus and they said my distributor needed to be replaced... well, they said to start with the distributor, but it might also be the PCM. Apparently the miss is on the #3 cylinder, and the distributor shows no pulse generation with a scanner hooked up. I am debating spending $150 on a new distributor or buying a used one on ebay out of a 1992 deville for $30 with a 6 month warranty. Basically, how likely is it that if I buy a used distributor, it will die within a year? ]]> HT4100 4.1, 4.5, 4.9 rumgool http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183882-1993-cadillac-deville-4-9l-distributor.html Fuel pump and FPR recommendations? http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183799-fuel-pump-fpr-recommendations.html Mon, 02 Nov 2009 00:44:19 GMT I've been having hard hot start issues more and more frequently so I decided it's time to get a pressure gauge and start poking around in there... I've determined that it's either the FPR or the fuel pump check ball but I cant go much further until I get a test gauge.

There's no fuel at the FPR nipple, and the injectors are fairly new but the system does not hold pressure overnight.

Anyways, I was wondering what are the most reliable brands for fuel pumps and FPR's?

According to my wallet, AC Delco is out of the question so it's looking like Bosch, Airtex, BWD, CarDone, etc etc

What do you guys think? ]]> HT4100 4.1, 4.5, 4.9 Sevillian273 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183799-fuel-pump-fpr-recommendations.html Could bad motor mounts cause stumbling on light acceleration http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183704-could-bad-motor-mounts-cause-stumbling.html Sat, 31 Oct 2009 18:11:58 GMT Hi everyone it's me again just wondering could bad motor mounts cause my stumbling on light acceleration i checked the motor mounts today and when in drive and under load the motor was jumping around not so bad in reverse could that be the problem or no i don't wana keep putting money into the car that isn't gonna solve the problem do you think it can be that? ]]> HT4100 4.1, 4.5, 4.9 mike93 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183704-could-bad-motor-mounts-cause-stumbling.html Judgement Call - No Heat 93 Deville http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183669-judgement-call-no-heat-93-deville.html Sat, 31 Oct 2009 01:35:29 GMT Okay - let's start off I want NO SYMPATHY here. It is what it is. Anyway......I have a 93 Deville owned in family since new. Now it's at a tick below 90k miles. From a "need" standpoint, I dont need the car...I have another daily driver and a different "backup". This is my 3rd car. I like it...and think its sort of a respect factor to my parents/grandparents to take care ot it. Normally I do my own stuff, but work took precedence - so whatever.

Fall 2008 I took my car to a local "trusted" shop to have my coolant system for its annual flush/refill of coolant and supplement tabs. The car was bought Nov 1992 and has been a ritual since. It got a clean bill of health and we moved on. Car garaged. My parents know the owner of the shop I took it to, but he's pretty disconnected from the day to day operations of the shop.

Come late Winter 2008 (2 mo later) ...little heat. Take it back to the same shop, they say the heater core must be clogged and needs to be replaced. Per my request, they reluctantly did a more intensive flush with the same result. I let it go until recently.

Between the "Little Heat" and now, I learned I had Leukimia, advanced stage. I have to think the owner of the shop knows, as he and my parents talk often.

Now...I have everything under control healthwise and things are looking better. Work has slowed down and since I've been feeling a lot better, I swapped out the core last weekend.

Still, no (or very very little) heat.
Did some reading here and find info on the "T". Pop the hood and find the T is REVERSED. The restrictor is on the drivers side of the T.
I switched the T and viola....HEAT!!

so I ran it by the owner of the before-mentioned shop. Owner brings his Cadillac mechanic over. Said mechanic says there's no way the T could have been reversed for a year. If it was, the car would be toast. It would have overheated LONG before now. It will ONLY cool properly if the T was right and he would have immediately noticed that.

My question is...............how possible is it for
A - something have taken place to generate interest in said shop performing core replacement (estimate $600)
B - Something fishy taken place at the shop to initiate my interest in having them perform the repair.

Please advise - I'm not out to judge anyone - just looking for honest opions. ]]> HT4100 4.1, 4.5, 4.9 Lance Allison http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183669-judgement-call-no-heat-93-deville.html Motor is very clean in my 4.9 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183510-motor-very-clean-my-4-9-a.html Wed, 28 Oct 2009 22:16:53 GMT Hi everyone today when i checked the oil and also opened the oil filler cap looked inside and motor is spotless no sludge or anything the motor runs great and i can't belie how clean the motor is inside it's been well maintained I hope my 4.9 makes it to 300,000-400,000 thousand miles. It's only got 102,000 on it right now. ]]> HT4100 4.1, 4.5, 4.9 mike93 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183510-motor-very-clean-my-4-9-a.html Cold Air Intake/Exhaust http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183399-cold-air-intake-exhaust.html Tue, 27 Oct 2009 18:31:19 GMT I want to mod my 4.9L 1995 Sedan DeVille.

Can anybody show me what kinda intake's they have used, or what they have used to homebrew?

Same for exhaust. ]]> HT4100 4.1, 4.5, 4.9 SiK GambleR http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183399-cold-air-intake-exhaust.html 84 eldo. antena http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183316-84-eldo-antena.html Mon, 26 Oct 2009 18:10:55 GMT hi, does any one know how I can remove the power antena assembly , the mast is stuck up, the motor runs unless I unplug the wires to it but the mast will not retract even if i try pushing it down,... hi, does any one know how I can remove the power antena assembly , the mast is stuck up, the motor runs unless I unplug the wires to it but the mast will not retract even if i try pushing it down, was hoping not to damage the mast but canot see how to get out of front fender with mast up?
thanks for any help
DNE ]]> HT4100 4.1, 4.5, 4.9 DNE http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183316-84-eldo-antena.html Symptoms of faulty distributor pick up coil http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183196-symptoms-faulty-distributor-pick-up-coil.html Sat, 24 Oct 2009 22:55:12 GMT What are the symptoms of a faulty distributor pick up coil? What are the symptoms of a faulty distributor pick up coil? ]]> HT4100 4.1, 4.5, 4.9 mike93 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183196-symptoms-faulty-distributor-pick-up-coil.html I finally switched from dexicool http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183148-i-finally-switched-dexicool.html Sat, 24 Oct 2009 01:19:54 GMT I finally switched over from dexicool to the good old fashioned green that mixes with all makes and models on my 93 deville 4.9 is the coolant tablets mandatory?? I finally switched over from dexicool to the good old fashioned green that mixes with all makes and models on my 93 deville 4.9 is the coolant tablets mandatory?? ]]> HT4100 4.1, 4.5, 4.9 mike93 http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/183148-i-finally-switched-dexicool.html