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Threads 3726 to 3750 of 4095

Cadillac Forum: HT4100 4.1, 4.5, 4.9

This forum is to discuss the newer aluminum block Cadillac engines.

  1. Sticky Thread Sticky: OBD I codes for 4.x Engines

    To retrieve the codes, Turn the ignition on. Press both OFF and WARMER on the climate control at the same time until the segment check displays. The codes will now be displayed. When the codes are...

    Started by DaveSmed‎, 09-20-04 01:50 AM
    • Replies: 0
    • Views: 56,346
    09-20-04, 01:50 AM Go to last post
  1. advancing the timing question

    Hey guys! I had a question about advancing my timing on my 95 Deville. I've been reading that a lot of the gents in here have there timing advanced 2 to 3 degrees and all talk about a noticable...

    Started by green Deville‎, 05-29-04 10:22 AM
    • Replies: 6
    • Views: 573
    05-30-04, 10:02 AM Go to last post
  2. Muffler pictures

    Here are some photos of my muffler installation, hope this helps.:)

    Started by caddy john‎, 05-29-04 11:44 AM
    • Replies: 4
    • Views: 1,248
    05-30-04, 09:55 AM Go to last post
  3. Re:Eldo 403FI swap w/MEGASQUIRT ?

    Good evening I'm still trying to come-up with a GOOD Plan for the 83 Eldo Touring Coupe. I've Got the car(83 Eldo) will probably pick-up the 79 Olds Tornado w/350 and 325L trans.for Parts...

    Started by just-j‎, 05-24-04 10:44 PM
    • Replies: 10
    • Views: 1,712
    05-29-04, 09:23 PM Go to last post
  4. Throttle position sensor question

    Hey again. I have question about the tps. Is there a procedure involved in checking the tps. I just want to assure that the sensor is working properly so I can rule that out. Thanks. Another...

    Started by green Deville‎, 05-29-04 10:31 AM
    • Replies: 2
    • Views: 707
    05-29-04, 12:22 PM Go to last post
  5. Smile Muffler

    I just had a Camaro HO dual outlet single inlet muffler installed on my 1991 SDV, it has a great sound. The shop that installed it said it was the first one they installed like it, it sounds like a...

    Started by caddy john‎, 05-27-04 08:01 PM
    • Replies: 4
    • Views: 529
    05-28-04, 10:15 PM Go to last post
  6. 4.1 to 4.9 swap

    i have a 4.9 but need to know if putting the intake off the 4.1 and placing it on the 4.9 is better. or swapping in the new wire harness wire harness or if is not going to make much of a differnce...

    Started by kpobrien‎, 03-30-04 10:23 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 1,795
    05-28-04, 07:13 PM Go to last post
  7. 4.9 leaking oil?

    I just bought a 94 Sedan Deville, it's a beautiful car, but the engine leaks a bit of oil. I'm not sure where it's coming from. Is there a common place on these engines that start to leak? The car...

    Started by caddydaddy‎, 05-24-04 10:24 AM
    • Replies: 7
    • Views: 1,086
    05-28-04, 07:03 PM Go to last post
  8. injectors

    i took my injector rail off last night... before i put it on, i would like to know how to test my injectors to see if they are still good. would it be a good idea to put all new injectors on, or...

    Started by LacSeville‎, 05-27-04 02:29 PM
    • Replies: 4
    • Views: 637
    05-28-04, 05:04 PM Go to last post
  9. Vibrating noise around throttle body

    I have a wierd noise coming from the throttle body area.I can feel it in the distibutor cap and I can hear it between the cap and TB,mostly around the cap.Lately I noticed,when I shut my car off the...

    Started by 91 Eldo TC‎, 05-28-04 12:06 PM
    • Replies: 1
    • Views: 512
    05-28-04, 03:33 PM Go to last post
  10. Surging/cutting out? 1991 Deville 4.9

    Hi Everyone, Let me start by trying to explain this problem as much as I can.. Then what I have checked and replaced(not because it was bad, but because of starting a fresh repair history) ...

    Started by Wingralf‎, 05-19-04 11:45 PM
    • Replies: 8
    • Views: 2,343
    05-27-04, 02:13 PM Go to last post
  11. replacing 4.1 with chevy 5.0

    I have a rear wheel drive 1984 DeVille. I have been driving it for 9 years. It was mechanically abused when I bought it, I rebuilt the motor and got 60,000 miles out it when the crankshaft broke in...

    Started by leszczar‎, 05-24-04 07:50 PM
    • Replies: 2
    • Views: 690
    05-27-04, 12:52 AM Go to last post
  12. Exclamation Rough Idle, stalls and hesitations, but...

    Hey guys, I'm new here but I've been wrenching on HT41's for about 7 years now. I gotta tell you this forum is amazing. First you guys get a lot of good, solid technical advice. Sometimes I have to...

    Started by hops‎, 03-28-04 03:51 PM
    • Replies: 11
    • Views: 1,522
    05-26-04, 03:02 PM Go to last post
  13. Need help with front main bearing!

    I read the older post regarding the front main bearing "thump". I went to the dealer today and they wanted to keep it over night and charge me $45 to tell me what it was. They said that the noise...

    Started by Msilva954‎, 05-20-04 08:05 PM
    • Replies: 7
    • Views: 881
    05-26-04, 01:30 PM Go to last post
  14. Crack in exhaust manifold

    Brand new on this site, absolutely enjoyed the debates and solutions offered on this site. I drive a 1987 Eldorado and it began to run rough, and failed the NOx air test. Changed O2 sensor, spark...

    Started by globetrotter‎, 05-25-04 06:18 AM
    • Replies: 3
    • Views: 1,066
    05-26-04, 03:05 AM Go to last post
  15. How hard to replace radiator out of 92 Deville?

    Ive done radiators on a couple other GM cars. Is doing a radiator on one of these any different? Anything specific I should watch out for?

    Started by 96z‎, 05-25-04 02:01 PM
    • Replies: 2
    • Views: 614
    05-26-04, 01:04 AM Go to last post
  16. Turns out I have a bad water pump.

    Took the car to the dealer after all today. And according to them I have a bad water pump, that is what is causing the noise all the time. I hope they are right. But then after that they said to fix...

    Started by Msilva954‎, 05-24-04 08:30 PM
    • Replies: 9
    • Views: 827
    05-26-04, 12:21 AM Go to last post
  17. 1988 deville fuel pump harness question

    hey all, long story short, i had to drop my fuel tank to replace the pump. this was done on my street with some basic tools, 2 ramps, a jack, and my very mechanically inclined brother. the...

    Started by r0guenj‎, 05-21-04 10:56 PM
    • Replies: 5
    • Views: 1,541
    05-25-04, 09:38 PM Go to last post
  18. Help Plz

    I have 92 SDV with a remn./rebuild 4.9 .I've put new wires, AC DELCO plugs,feul filter,cap,rotor,isc,iat sensor,map sensor,air filter,pcv valve and cleaned the egr tubes/throttle body and checked the...

    Started by PALMS92DEVILLE‎, 05-25-04 04:13 AM
    • Replies: 3
    • Views: 556
    05-25-04, 03:22 PM Go to last post
  19. gaskets, paint, parts cleaner

    when i took the exhaust manifolds off my old engine, there were no gaskets, but the longblock came with gaskets. should I use them? where can I find parts cleaner? i have a parts cleaner with a...

    Started by LacSeville‎, 05-23-04 09:01 PM
    • Replies: 2
    • Views: 578
    05-23-04, 09:36 PM Go to last post
  20. ht 4100 4.1 swap to a 4.9

    found a thread on this please deleat

    Started by tacoma‎, 05-23-04 06:11 PM
    • Replies: 0
    • Views: 688
    05-23-04, 06:11 PM Go to last post
  21. Questions About Eldorado Country site/info ---403FI swap

    I'm recently NEW to this forum. I've picked a 83 Eldo Touring Coupe, with a locked-up engine. I've read about the 403FI swap.... But I'm a lil un-clear about the Fuel-injection set-up. Does...

    Started by just-j‎, 05-23-04 10:56 AM
    • Replies: 1
    • Views: 459
    05-23-04, 05:35 PM Go to last post
  22. Codes are back!

    The other day my fiance was driving home in our '84 DeVille and didn't feel like stopping for gas, was early in the morning. The gas gauge got down to where the light starts coming on, and the...

    Started by rollerz70‎, 05-22-04 07:31 PM
    • Replies: 2
    • Views: 433
    05-23-04, 09:20 AM Go to last post
  23. 87 DeVille 36k ori. miles

    I am considering buying a 87 DeVille w/36,000 miles for $5100. It has the 4.1 motor. The 2 left side speakers don't work otherwise the car is mint. Good deal or bad? Thanks for your advice.

    Started by gmjk49‎, 05-22-04 10:03 PM
    • Replies: 1
    • Views: 397
    05-23-04, 08:31 AM Go to last post
  24. 91 deville oxygen sensor(s) location

    so my local parts store says i need 2 sensors for this car. turns out i can only find one located off of the rear (closest to the firewall) side of the motor. if there are really 2 on this car, can...

    Started by disruptive_entity‎, 05-22-04 12:00 AM
    • Replies: 1
    • Views: 888
    05-22-04, 11:56 PM Go to last post
  25. Gasket to Oil line connector in Radiator.

    this gasket has been leaking fluid down the drivers side of the radiator where the top oil line goes into the radiator. Which I disconnected durring a major Oil Change/flush out). It's almost a 1...

    Started by 2Clown2‎, 05-19-04 11:24 AM
    • Replies: 6
    • Views: 1,418
    05-22-04, 11:54 PM Go to last post

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