Question about 1992 Volvo 940

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92 buick skylark 3.3 erratic idle - 1992 Volvo 940

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  • yadayada
    yadayada May 11, 2010

    explain what u mean by erratic idle


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Try checking / changing the oxygen sensor.

Posted on May 20, 2009

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Vacuum leaks, air filter clogged, idle control system, or leaking egr, leaking head gasket, worn timing chain, camshaft lobes worn, valves burnt or leaking, faulty emissions or engine control system.
Could be any of the above. Check your air filter first, then vacuum leaks, the idle control valve sensor. Work your way through them from the cheapest to the expensive. Good luck!

Posted on May 15, 2009

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Posted on Jan 02, 2017

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1 Answer

Runs but won't stay running. I put a new fuel pump in it

Not really enough info to go with here but here are a few suggestions:

1. Check battery and alternator. If battery voltage is too low the ignition system may be kicking off.
2. Check for obstructions in the intake and tail pipe. Make sure air path is clear.
3. If the above 2 items check out there may be an issue with some intake side sensors or air control valves. I can't say for sure on the skylark but other Buick vehicles I have worked on use an idle air control valve that can get stuck over time and it will cause all kind of erratic behavior at idle.

Hope this helps...

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power for the a/c unit comes via a switch,blower switch,climate control module, low/high pressure switches, fuses.

Jul 06, 2014 | 1992 Buick Skylark

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Why does my 92' Buick Skylark keep dying Out.?

You have 2 issues here #1 the engine is running hot . Test the cooling system fans they seem to be not working. #2 car dies i would start with testing the secondary ignition (spark).

Apr 30, 2014 | 1992 Buick Skylark

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92 buick century when i start it up the idol goes way high like its going to blow put in drive it jerks and eats alot of gas

more then likely it is the IAC thats bad. clean or replace the IAC. more causes are--- erratic idle (including high idle speeds) can be caused by a faulty throttle position sensor (TPS) - a common problem. and check for a bad vacuum hose also. good-day ! clean IAC first ! to see if this helps then go from there.

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I have a 92 buick skylark 3.3. v6 that I just replaced the starter on after the original starter gave out...after 3 days it's acting like the starter is junk already...I need to know if there's an inline...


Dec 15, 2010 | 1992 Buick Skylark

1 Answer

90 skylark Stalling, Inconsistent idle

If you have EFI your jets could be clogged and need to be cleaned. Also with the erratic idle it might be your Throttle Position Sensor. The only other things i can think of are your Catalyc Converter and with the cutting off your Fuel Pump. If you don't have EFI and if you are not familiar with carbuerators I would recomend having it checked.

Aug 25, 2009 | 1990 Buick Skylark

3 Answers

92 buick skylark

you may try replacing the computer,i had the same problem with my buick last year. a new computer solved the problem.

Jul 20, 2008 | 1992 Buick Skylark

3 Answers

Plug wires

Good Day,

You didn't specify your engine size so here's a few diagrams:

29d6d5f.jpg2.0L 4cyl

fb6d0e2.jpg3.0L 6cyl
618de1a.jpg3.1L 6cyl
1e777e9.jpg3.3L 6cyl

I have labeled these according to engine size, make sure you use the right one.

Good Luck and hope this helps

Jul 01, 2008 | 1993 Buick Skylark

1 Answer


make sure there is coolant in the motor and hopefully no air. best way to find the tstat is to trace where the upper radiator hose comes off radiator and goes to

Jun 26, 2008 | 1992 Buick Skylark

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