Question about 1994 Cadillac DeVille

1 Answer

Excessive ping after engine is warm

No ping on start up, after operating temp, starts pinging, no codes present, or history codes, some say carbon,cat, converter semi clogged, vacuum leak., i have vac. guage, how much vac..should i get. any repair could be costly., got to try to pinpiont.

Posted by on

  • chip111 Aug 18, 2008

    excessive ping after warm up. I use prem gas always. Have added octane booster. Had dealer tuneup the engine and still does it. Help



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 2,920 Answers

Timing is off a bit and you might try running premium gas through it and add a bottle of heet to the tank,

Posted on Aug 13, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How to prevent engine knock on 92 Ford Thunderbird Lx

The sensor helps to monitor the engine performace, and when it detects knock or pinging. It sends a signal to the PCM which in turn adjusts the timing and fuel ratio to reduce or eliminate it in those situations you have knocking. Low octane, bad gas, carbon deposits and heat will contribute to pinging. It's best to replace the sensor if you know it is faulty to avoid damage to the engine.

Jan 30, 2016 | Ford Cars & Trucks

1 Answer

What causes a 1989 nissan pickup ping or knock?

Pinging or detonation is caused by the spontaneous combustion in the chamber from incorrect air/fuel ratio and timing. It is most prevalent in lean mixtures under load. Run the fault codes and check for faulty HO2s and O2 sensors as they tell the ECM what mixture and timing is required to stop it

Apr 25, 2014 | Nissan Pickup Cars & Trucks

1 Answer

Since day one, my 2007 Dodge Ram Hemi always starts like its in a cold engine cycle. In other words, it starts at a high rpm and steps down in increments for about 20 seconds. Hot, cold no matter. It...

Yes, it is normal for a vehicles idle to be high when first starting up, no mater what the temp. If it`s already warmed up to operating temp, it will still have a high idle for a brief moment when starting. Usually this is the IAT (Intake Air Temperature) sensor. Located in the air duct down from the air filter, and before the throttle body.

Main proplems from IAT sensors are to low of an idle at normal temp, or the idle never comes down after warm up.

Your gas milage problems would stem from Oxygen sensors, plugs, wires, timing, etc...

Here is a quick test, just incase your OBD II (Computer, PCM..) memory module is not working properly. With the engine running, using the tips of your fingers, tap on the PCM, if the engine stumbles or stalls and sends troubles codes that light up your check engine light while tapping, if it does, check to make sure all wires are securely attached to it.

Apr 19, 2011 | 2007 Dodge Ram 1500 Quad Cab Sport

1 Answer

When engin gets hot it starts to **** is the plugs

if it is overheating , ti will ping. do not drive like this. Low on coolant? why getting hot? or do you just mean at operating temp? If yes, your EGR valve is plugged or not opening. EGR reduces ping on warm engine by reburning exhasut gases.

Jan 07, 2011 | Ford Fiesta Cars & Trucks

1 Answer

Service engine light on. Ping sound.


Jul 06, 2009 | 1999 Saturn SL

1 Answer

1995 Caprice Classic

excessive pinging is caused by either bad fuel, or a bad cam position sensor or a crank position sensor.

Aug 29, 2008 | 1996 Chevrolet Caprice Classic

1 Answer

Engine has pinging sound when warms up....

When does this noise occur? During idle or acceleration? Is the vehicle warmed up? Is the check engine light on? Are there any codes stored in memory? Was anything done as a repair prior to the noise starting? How many miles is on the unit?

Aug 25, 2008 | Ford Crown Victoria Cars & Trucks

1 Answer

No egr flow after reaching operating temp

use an OBD II reader, $60 at Walmart.

Also try cleaning out your air intake. Carbon buildup can cause rough idle and hesitation. Run two or three cans of throttle cleaner through it, clean out the pathways from the EGR to the intake, put two shots of the LUCAS brand fuel system cleaner in it or SEAFOAM.

If it improves then there you go. If not, you may have other issue, take it to a mechanic or have a gearhead friend take a look.

The OBD will tell ou if theres any engine codes going off caused by something wrong.

use the Carb cleaner/Intake cleaner by removing the the air intake hose to the air box, use one hand to increas the throttle whiile spraying the cleaner through it. Make sure to rev it enough to keep it from stalling, bu tnot too much.

If you start seeing smoke come out your tailpipe, then you have carbon buildup.

If unsure about any of this. I suggest you make friends with a guy or gal that knows about cars, buy em a six pack and ask them what they think about it, eventually they wont be able to stop themself from helping you.

Good luck

Jun 17, 2008 | 1994 Cadillac DeVille

Not finding what you are looking for?
1994 Cadillac DeVille Logo

Related Topics:

143 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides