Question about 1992 Cadillac DeVille

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My 1992 cadillac deville wont start unless i push the gas pedal while im starting it and the idle is very high and never kicks down at all while driving even after the engine is hot , i also got 2 error codes e30 and e48 idle speed control and egr system problem ,can you tell me exactly what the problem is.

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2 Answers

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  • Cadillac Master
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If the EGR is stuck open mechanically or from carbon the idle can go high . A bad IAC or incorrect signal from the computer module can cause high idle . Vacuum leaks from intake gaskets and PCV valves .

Posted on Jan 04, 2018

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  • Cadillac Master
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Not without testing ? Your best bet , take it to a qualified repair shop.

Posted on Jan 04, 2018

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6 Suggested Answers

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SOURCE:

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Posted on Jan 02, 2017

Anonymous

  • 61 Answers

SOURCE: 95 sedan deville wont start and says fuel low with gas in tank

I'd start by tracing the fuel supply and return lines from the gas tank to the engine compartment. Make sure that they are free of kinks or other damage.

Next, check the fuse box and make sure there is power to the fuel pump. Trace the electrical connections leaving the fuel tank and make sure they weren't torn or otherwise damaged by the tire tread.

Hope this helps and good luck!

Posted on Jan 13, 2009

Anonymous

  • 18 Answers

SOURCE: car is making loud high tone while driving 1992 cadillac deville

your water pump may need to be changed. have a trusted mechanic check it. the water pump is connected to the drivebelt of your 4.9 l engine, and if thats where the sound is coming from you can be pretty certain

Posted on Aug 10, 2009

consiglio46

consiglio46

  • 12 Answers

SOURCE: im getting error codes p1350 n p1370 on a cadillac

Remove your entire coil pack and ICM, disassemble it, and clean every contact and connector 

Something's fishy with the ICM trigger signals, and you may just luck out with a good electrical cleanup.

or maybe even replace it

Posted on Apr 30, 2010

venuti

  • 1 Answer

SOURCE: I have a 1995 Cadillac

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?

Posted on Oct 06, 2010

jturcotte

Jeffrey Turcotte

  • 8980 Answers

SOURCE: Please help: 1992 Cadillac Deville:

E13: right bank O2 sensor, no data
F48: low refrigerant level in A/C system

Neither of these is likely to cause rough idle, but I would change the sensor.
If that cure it, great.

If not, make sure the vacuum hose on the fuel pressure regulator (at end of fuel rail) is tight at both ends and not cracked or leaking. Then pull the vacuum hose off the regulator and see if there is any fuel in the vacuum hose. If yes, replace regulator.
I also recommend cleaning up the intake side of engine with carb cleaner or equivalent: throttle body, Mass airflow sensor, EGR system, and PCV valve. Make sure EGR valve is operating.

If you have questions, please let me know.

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fuel press reg:

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Posted on Oct 24, 2010

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1 Answer

Hi my 01 Deville wont idle when cold unless im keeping my foot on the gas pedal. Once it's warm, it idles fine. Any ideas?


If it were mine, the first things I'd do would be to clean the carb or jets, whichever, put a new air filter in, dump a can of Sea Foam in a full gas tank, give it a new gas filter. Could be your thermostat is sticking a bit.

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Check for loose vaccum hoses. If everything looks in place, I would suggest you collect as much information as possible: Engine light on? what is the troublecode?

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What causes my 1992 cadilllac deville to flood with gas, not wanting to start, wont idle?


Could be the fuel pressure regulator or a faulty injector.
I would check the fuel pressure first.
Is the check engine light on ?

Jul 21, 2012 | Cars & Trucks

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My 92 cadillac deville is loosing power after i drive it for so long. I press the gas and it doesnt rev up or speed up unless im barely pressing the gas pedal what is the problem??


Check the air filter for a blockage. If you have a scanner, check to see that the TPS (throttle position sensor) is going all the way from 0% to 100% opening as you press the accelerator down all the way, while the ignition is on and the engine is not running.
Check for codes that might lead to a solution, if the above doesn't help.

May 30, 2010 | 1992 Cadillac DeVille

1 Answer

Idle problems with cadillac


dee if the linkage is binding first, clean the throttle body and lubricate all moving parts if this doesn't solve it an accellerator cable may need replacing

Jun 29, 2009 | 1992 Cadillac DeVille

1 Answer

My 92 cadillac sedan deville is idling very high and when i let off the brake it will increase in speed w/o pressing the gas pedal. any ideas?


sounds like the ISC ( idle speed control ) motor is being told by the computer to extend or else its possibly binding. Located on the drivers side of the throttle body . Also check for binding aceelerator linkage. One other thing that might sound strange is check the floor mat by the gas pedal. Sometimes gets jammed.

Feb 20, 2009 | 1992 Cadillac DeVille

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