Question about 1993 Cadillac DeVille

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My 93 cadillac deville idles very high and error code e30 shows up, what part needs replacing?

1993 cadillac deville idles very high especially when i first start it up, also since winter began I have had a problem starting the car it takes 5 or 6 tries before it starts then for about 1 minute white smoke comes out of tail pipe that smells strong of exhuast, i re ran codes and now e53 also shows up. PLEASE HELP

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: Error Codes

These may have been set by the battery change and are what GM calls phamtom codes, clear the codes with the following.
Try this and see if the codes go away.

1. Re-enter diagnostics via the climate control panel and after all the codes appear you will see .7.0

2. Simultaneously push and hold the OFF and HI (^) buttons on the climate control panel until you see E.0.0 and release both buttons.

3. Turn ignition key OFF, Wait 15 seconds and re-enter diagnostics and see if the codes reappear. If they do NOT reappear, You are good to go.
After you have done this try starting the engine and see what codes re-appear, also run and OBD 2 test of the system at the diagnostic connector, this will give P codes that we are better able to find definitions for, the E codes are unique to just a few GM cars.

Posted on Oct 13, 2008

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  • 93 Answers

SOURCE: I have white smoke coming from the tail pipe

hi... it all depends on the colour of the smoke... usualy blueish smoke will mean it is oil burning and your piston rings may be getting worn if it is black then it might be running too rich etc.. a little bit of water is fine infact usualy it is a good sign that your engine is not running rich or lean so it is pointing towards oil seals... also if it was running rich it would probably do it more when it was cold

Posted on Feb 11, 2010

Testimonial: "Thanx lukewooly. The digital does does say check oil level now that I think about it.Very helpful. Don't wanna spend more than the car is worth."

SOURCE: I have smoke coming from both of my tail pipes on

If your loosing coolant when it cools off and draws it out of the resevoir,you know it is water and then maybe white smoke.
You could warm it up without the rad cap and look for bubbles. It will push out air and coolant anyway,so that will be a difficult test.

Dual exhaust issues,should be common to both banks. I would go with coolant and intake gaskets first,may have a crossover in manifold,so you get both pipes effected.

Posted on Sep 29, 2010

SOURCE: My 1993 cadillac deville feels

The error is indicating that the Throttle Position Sensor (TPS) is out of the normal range with respect to the Idle Speed Control (ISC). Try something really simple and inexpensive first by removing the air ducting between the air filter box and the throttle body. Clean the throttle body interior and throttle plate with a cloth sprayed with WD40. Turn the throttle plate by pushing it at the top with your fingers and clean the throttle throat behind the plate as best you can. Reassemble the ducting and ensure that there are no air leaks at the junctions and no splits. Turn the key to position 2 (engine not running) and depress the accelerator pedal to the floor and then back up again. Start the car and nine times out of ten that should fix it. The TPS measures the opening angle of the throttle plate. The TPS is device consisting of a circular carbon track with a slider, corresponding to the throttle plate, sweeping along it. It as three wires to it, two to provide the 0 to 5 volt range along the length of the carbon track and the third to measure the voltage at the contact point of the slider. To check the TPS measure the voltage of the middle pin of the connector when the ignition is at position 2 (engine off) as you push the throttle plate open and closed by pressing on the accelerator pedal. The voltage should alter in a smooth continuous way. Any drop outs of signal indicate a worn carbon track and the TPS should be replaced.

Posted on May 09, 2011

  • 514 Answers

SOURCE: white smoke from the tail pipes, rough idle in

i think you have a water leak maybe the head gasket is going bad any way gasoline produces water and is normal with cold weather.

Posted on Oct 28, 2011

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I have a 93 Cadillac Deville when I turn on the heat it blows a 10 amp fuse and the transmission stops changing gears. What is wrong?


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Jan 10, 2016 | 1993 Cadillac DeVille

1 Answer

Cadillac Deville E30, What do i need to replace?


All you have to do with any codes are Google them

Cadillac OBD1 E30

DTC E30- IAC-Idle Speed Control Motor

Mar 23, 2013 | Cadillac DeVille Cars & Trucks

1 Answer

My 1993 cadillac deville feels as if the rpm's are running high (idle seems too high) the service engine soon light ocassionally comes on and I get the error code E30. Anybody have any ideas??


The error is indicating that the Throttle Position Sensor (TPS) is out of the normal range with respect to the Idle Speed Control (ISC). Try something really simple and inexpensive first by removing the air ducting between the air filter box and the throttle body. Clean the throttle body interior and throttle plate with a cloth sprayed with WD40. Turn the throttle plate by pushing it at the top with your fingers and clean the throttle throat behind the plate as best you can. Reassemble the ducting and ensure that there are no air leaks at the junctions and no splits. Turn the key to position 2 (engine not running) and depress the accelerator pedal to the floor and then back up again. Start the car and nine times out of ten that should fix it. The TPS measures the opening angle of the throttle plate. The TPS is device consisting of a circular carbon track with a slider, corresponding to the throttle plate, sweeping along it. It as three wires to it, two to provide the 0 to 5 volt range along the length of the carbon track and the third to measure the voltage at the contact point of the slider. To check the TPS measure the voltage of the middle pin of the connector when the ignition is at position 2 (engine off) as you push the throttle plate open and closed by pressing on the accelerator pedal. The voltage should alter in a smooth continuous way. Any drop outs of signal indicate a worn carbon track and the TPS should be replaced.

May 09, 2011 | 1993 Cadillac DeVille

1 Answer

Where do i turn up idle or how do i turn up idle on 93 cadillac deville


for the most part u dont if it dose not idle right there is something wrong .

Nov 13, 2010 | 1993 Cadillac DeVille

1 Answer

I have a 1995 Cadillac Sedan Deville with 109k miles. I bought it new, and it's been without any major problems. Now there is a consistant engine shut down problem after driving or at idle for 7 minutes...


I have a similar issue with a 94 DeVille. Runs for a while then shuts down. Fuel pressure is good (I drove around with a pressure gauge attached and it still shut down with no drop in pressure). I've replaced the idle control and ignition module - no improvements.
I too have code P012 showing which to (potentially) the crank position sensor - which I can't seem to locate.
Any luck on your issue?

Sep 07, 2010 | 1995 Cadillac DeVille

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Need to replace turn signal switch 93 cadillac deville


First do you have a sterring wheel puller. Can't remove the steering wheel without one. Quite an involved job including snaking the electrical connector end through the steering column. I wouldn't recommend it to the novice

Mar 28, 2009 | 1993 Cadillac DeVille

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Troubleshooting car starting problems for a 93 Cadillac Deville


this happen with my 93 ,if the car cranks,it's your gas presser regulator. it's on the top of the engine ,right side of carb.

Dec 28, 2008 | 1993 Cadillac DeVille

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