Hello Caddy owners... My 93 Deville, stopped performing on me this weekend.
It was running sluggish, and I bought some STP throttle body spray, and was spraying this stuff down the two tubes and all is well, I park my car and the next morning I'm driving to work and I have no power (meaning when I push the gas it does not move)

What is the problem? It will start up but idles so low, when I press the accelerator it wont move. I also hear a slight knock from the motor. WOuld the oil pump prevent the car from moving? I'm stuck, dont have the codes yet, but I don't know how to read them if I did. Hopefully someone out here can help me I have 140K miles on it.

Get a coat hangar and rod those EGR tubes out. I suspect you clogged them up. AFTER they are rodded and cleaned, THEN you can spray them down, but it is not necassary.

Pull the codes by simultaneously pressing and holding the OFF & WARMER buttons. Once in diagnostics the HI FAN = YES and the LO FAN = NO to the prompts. OBDI code definitions are here. http://myweb.accessus.net/~090/dtcobd1.html

Thanks for the suggestions Ranger, I can't wait to get off work, and try this out, I'm missing my caddy.. Bought a 91 Caprice Classic over the weekend, and it really making me miss the caddy. I appreciate your help, and everyone on the site

I would first start by getting the codes and posting them back, When you sprayed the cleaner were you careful to avoid spraying anything electrical?

When you pull the codes you shouldnt have to navigate the prompts on a 93 if all you want are codes. The codes will show up in the Fuel Data Center just after all the lights go out so have a pen/paper ready in case their are several. You will see .0.0.7 or similar when they are over, then you use "Hi" and "Low" to navigate to various parameters, this really isn't useful info though without a factory service manual

This is another listing of codes for the 4.x engine
http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/21558-obd-i-codes-4-x-engines.html

The above link by ranger would work aswell, but may be a bit harder to navigate since it has extra codes for other GM vehicles and they are in a slightly different format

Due to the cold weather, I still have not started on the Caddy, but I will post the codes, I have attempted to view the codes although I don't understand them much but will use these replys to write them down.

I'm pretty sure I avoided any elect. components when I was spraying. Again thanks for the help.

Hello all, I finally have a Saturday to see what's wrong with the cadillac. Here are the codes I have and hopefully someone can help me out. I did visit the library and checked out a Haynes General Motors Repair Manual to see what the codes are about, but I hope to get some good responses here.

E90, 30, 31, 34, 52, 53, 98

Also there were so P codes but the repair manual does not mention these so here they are. P 24, 21, 128, .09, 1.6 , 01, 25, 422, 1.4

Help me out group, Im really missing my Caddy, and my Caprice has been running bad also, thought the cadillac converter was clogged so I had it cut off, and the car back fired and has not started up since. I had to borrow my cousins pick-up truck that he uses for lawn service. PLEASE HELP!!!!

First off, forget Haynes or Chiltons. Get yourself a FSM (Factory Service Manual) by Helm Inc.

Look up your codes here. http://myweb.accessus.net/~090/dtcobd1.html

P090 (E090) ......... VCC/TCC Brake Switch/Park/neutral switch Input Circuit Problem
P030 (E030) .................................................. . ISC RPM out of range
P031 (E031) .................................................. ... Shorted MAP Sensor
P034 (E034) ......................................... MAP Sensor Signal Out of Range
P052 (E052) .................................................. ..... PCM Memory Reset
P053 (E053) ....................................... Distributor Signal Interrupt
P098 (E098) .................................... High RPM P/N to D/R Shift Under ISC....

P031 & P053 seem to be the most likely cause of your drivability problem.

I will look for the factory service manual , but I hope to work on this sometime tomorrow.. As for e31 there is some info in this haynes book about that problem and how to change the sensor.

But the E53 Distributor Signal Interrupt I have no clue. Do you know what this is saying Ranger? Or any member?

Again thanks for replying and hope to hear some more great news. The car wont start but turns over good.

I am really not sure if it is saying that the distributor input or output signal is being interrupted, but I'd start looking for obvious loose connections, chaffed wires etc. Maybe the ignition module? Just guessing here.

Map sensor, I think I will try this first, anyone change this before on a 93 deville, if so I would welcome any suggestions on how to change it and if possible the location of the sensor.

Map sensor, I think I will try this first, anyone change this before on a 93 deville, if so I would welcome any suggestions on how to change it and if possible the location of the sensor.


Havent changed it on my 93 deville, Just changed one on a Chevy though, It is only 1 or 2 wires IIRC, If you look under the hood I believe thier is a diagram that shows the map sensor location, If I recall the sensor is right on top of everythig else and should only take a few mins to replace. I want to say its just a little black box about 1/4 in thick and 3 in long mounted toward the passanger side on a crossbar.

gotta love this site, i appreciate the post, Im going to brave the cold today I miss my caddy.

thanks

Replaced the map sensor, and the caddy still wont start........... any one help

do the accessories power on when you turn the key? also does it sound like its trying to start?

I dont have many ideas, just trying to get a idea of what the car does.

After sitting the battery could be weak.

all accessories light up the battery is fine, I had just got a new one. It just turns over.

Appreciate the post, Im sick I need my caddy running just not sure who to let work on it without getting scammed.

Have you ruled out a clogged CAT?

Ranger are you familiar with parts that the 93 Deville shares with other GM vehicles. It was on this site that I first became aware of this. But unfortunately I cannot find it anymore. It would be a great help for me as I'm still trying to get my cadillac back running. I just heard from mechanic that my dist. gears are messed up and I need a new dist.

Thanks in advance this site has been so helpful

No I'm not, but if you go to the A/C Delco site, they have a list of what cars each part will fit. Find the parts number, then click on "Vehicle List By Part Number".

Okay group I got the caddy back running last Saturday. And the mech. said the distributor grooves were tore up.

Well I replaced the distributor , had new plugs and wires, and cap. Was running good until this morning. It returned to the original state. Hardly running sounded all clogged up. What could it be, what made the groves on the distributor to be wore out.

What "grooves" on the distributor?

Check the ignition timing. Sounds like the mechanic didn't time it right. And by the "grooves" I think he means the gear at the bottom of the distributor.

i mean the gears opps..

And I was ready to take it back to the shop because once the car got warmed up, when I would shut it off, and try to restart it would turn over very slow. And in the morning after a cold night it would turn over very fast.

What would make the gears wear out on the old dist? Thanks for the help guys.

That is what I thought you meant. Maybe the drive gear on the cam is chewed up and destroying the new distributor gear. I would think that the only way it could get like that is from lack of lubrication.

Good evening ranger,,, I did get the caddy started... My mech. changed the plugs and wires and the distributor because the groves were wore out...But it only ran for about 5 days but it returned to the same state it starts but wont move because if u push the gas it stalls. What could this be? Hopefully someone will help me be able to ride the caddy again because now the caprice is acting up.. Yikes..my oil pressure is so high it is blowing the seal off the oil filter.. If anyone can help with this let me know..... Thanks caddy owners...

"Yikes..my oil pressure is so high it is blowing the seal off the oil filter"

I have just bought a 93 deville and have been around cars and turning wrenches on cars for a long time growing up on a car dealers lot. At first I thought that since you could start the car but it wouldnt stay running with giving it throttle it would be a mass air flow problem. Do 93 cads have a M.A.S.?
But since you said the seal on the oil filter is blowing oil, you either have a loose oil filter or worse yet you blew a head casket. the piston is blowing air pressure into an oil galley between the head and the block building and building pressure into the oil galley and blowing out the only rubber seal connection. Your mechanic is an idiot because if the gear on the distributor jumped or worn down the car wouldnt run and would spit and back fire . when you cut off the cat and ran it without reconnecting the pipes it would bang and pop with throttle, just like a race car....... but would still keep running... You have multiple problems going on. Give us the symptoms of the car and mantaince you did prior to it dying.

the caddy is not running mech says the cam wore out the gears, and the cam should be replaced.... He says it's hard can anyone help....Is it easier to just drop another motor?

Also I was reading the previous post talking about blowing oil filter (im having that problem with my 91 caprice mech says its the oil pump,,, im having it changed and its taking him forever.. I so wanna go lease a vette for $399 but the insurance is more........ Thanks for the help group

the caddy is not running mech says the cam wore out the gears, and the cam should be replaced.... He says it's hard can anyone help....Is it easier to just drop another motor?

Also I was reading the previous post talking about blowing oil filter (im having that problem with my 91 caprice mech says its the oil pump,,, im having it changed and its taking him forever.. I so wanna go lease a vette for $399 but the insurance is more........ Thanks for the help group

Im jealous. I wish when my car acted up I could go buy a new one! :want:

From everything being said above, it sounds to me like there might be internal engine damage already and it might be better to find a new motor with as many miles as that ones already got. Just my 2 cents. Hope you get your Caddy back on the road soon.