Question about 1985 Cadillac Eldorado

1 Answer

Pulsating idle When I start my 01 Caddy Seville it pulsates when in idle. Then If i stop for an extended period of time right after I had started her up she jerks violently like she's not getting enough air or fuel. At that very moment she will shut down yet, I can start her right back up. I don't have problems after driving for a little while or anytime throughout the day. Its just the over night sit. What could this be? I tested the codes after she shut down and there were no codes. thoughts?

Posted by on

  • srh_385 Mar 07, 2009


    I haven't done anything to address the issue. I don't want to start replacing things that don't need to be replaced. its not cheap. I purchased the car around 2 years ago. I have done nothing to it beside the regular oil/change and air filter. Could it the fuel injector or fuel pump by chance? or maybe a blown fuse?

    thanks for the help!

  • ccn7 May 11, 2010

    When was the last time the fuel filter was chg? Have you done a fuel pressure test?



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 12 Answers

Sometimes on the HT4100 Cadillac motors the timing would slip out of sync and that's where those idle surges would come in , as far as the transmission just go with a better synthetic automatic transmission oil like AMSOIL if this doesn't work your torque converter in some cases the flywheel might need to be replaced and might be lop-sided or cracked. These parts can easily be found at your local pick-a-part or salvage yard. GOODLUCK!!

Posted on Apr 16, 2009


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

A 6ya expert can help you resolve that 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.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Hello...I have a 2009 chevy cruze 1.8L ,some 3 months ago,the car had some pulsating and vibration during driving , so I changed the spark plugs and the problem was solved, but after about a month,the car...

Was any of the previous spark plugs fouled? Dirty? If so you need to investigate whether the problem is oil or fuel causing the fouling. Also a possibility is that you have a bad plug wire and when you changed plugs you disrupted the plug wire enough to make contact. Now possibly the plug wire is showing too much resistance causing a misfire at idle. Only way to be sure is to have the car scoped to see if the wires are proper or defective. That is unless you are the change parts and try type. In that case try a new set of wires. The reason is because at idle the voltage is not as high as it would be at higher rpm.

Aug 22, 2014 | 2012 Chevrolet Cruze LS Sedan 1.8L 4-cyl....

1 Answer

Why do my brakes pulsate and make it harder to stop at low speeds?

have you had your brakes looked at? Sounds like warped rotors.

Jun 17, 2014 | 1997 Ford Expedition

1 Answer

Car vibrates when idling and foot on brake

There are many possibilities related to brake and its components that can cause Vibrations while braking.On basis of this problem,i suggest you to check the link mentioned below:----Vibrations while braking?

---------Also its suggested to inspect the brake pedal itself,Brake pedal is pulsating and vibrating?
------------This will help.Thanks.Helpmech.

Apr 16, 2012 | 2004 Honda Accord 2.4

1 Answer

My a/c does not blow cold when idling


A/C stops cooling and blows warm air when the vehicle is idling for an extended period of time such as sitting in traffic.


Inadequate airflow over the condenser may cause this condition.

This problem is a known issue, See Bulletin No.: 01-01-39-004A

Aug 08, 2011 | 2003 Hummer H2

2 Answers

2000 mitsubishi diamante has spark has fuel up to the injectors and power but wont start.

At injector's, need to check if you have ground pulsation, to check, connect test light on pos (+) battery terminal, now your set to check ground, at injector harness, probe wire's, while some one cranks engine, look for pulsation, if you don't have pulsation, it will need a computer, injector pulsation is control by the computer, if no pulsation, then no fuel can get into cylinder.

Sep 09, 2010 | 2000 Mitsubishi Diamante

1 Answer

Engine idle pulsates when first started cold. Now does it after exiting freeway conditions, actually stalled at first intersection. Putting in neutral helps pulsating be less noticable

its possible it could be the lambda swith, this controls the exhaust emissions, its usually located on the exhaust down-pipe just below the manifold

Aug 25, 2009 | Ford Explorer Sport Cars & Trucks

1 Answer

Breaks grabbing and pulsating

brake shudder is caused by thcikness variation of the rotor surface. I would have the rotors machined on the car so they are perfect to your wheel spindle.
The grabbing could be due to low quality brake pads. Use Ford OEM or Motorcraft Value pads. has discounted brakes.

May 29, 2009 | 2005 Ford Five Hundred

1 Answer

1965 pulsating interior lights

Remove the alternator and have it checked. If it checks out ok, replace the voltage regulator.

Jul 22, 2008 | 1965 Ford Mustang

1 Answer

Brakes pulsate real hard

That is just the ABS system at work. It is supposed to prevent your wheels from locking which often makes the brake pulsate, especially in wet weather or or snow or ice. The only way to really stop this is to disable to ABS by unplugging it and removing the fuse. This will make the ABS light appear in your dash, but your brakes will stop pulsating.

Jul 14, 2008 | 1997 Pontiac Sunfire

Not finding what you are looking for?
Cars & Trucks Logo

165 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

77932 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 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