Question about 1987 Oldsmobile Cutlass Supreme

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87 cutlass supreme shuts off at idle

My 1987 cutlass supreme idles low and seems to want to shut off when i am idling. also, many times while idling at a stop light etc. the oil/choke light comes on. this too seems to cause the engine to shut off. any ideas?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 534 Answers

SOURCE: 1987 bmw 325 idles rough

I had a similar problem on a 318IS.
The rough idling was accompanied by an occasional whistling noise from the general engine area (caused by air leaks through the front and rear crankshaft oil seals).

The problem was caused by a faulty crankcase ventilation valve (Costs about $100).
The vent valve is easy to replace - (2 screws) - check the vacuum hose that connects this valve back to the tappet cover air vent nipple - it goes soggy and disintegrates.- replace with suitable oil resistant vacuum hose.
While on the job, clean the throttle body / butterfly valve internally with a soft toothbrush dipped in petrol. This cleans off sooty deposits - makes engine idle rpm more consistant.

Posted on Jun 04, 2009

  • 178 Answers

SOURCE: rough idle stalls at low rpm's

hello first check your idle with the car running foot on brake see were your rpm reading is if your below 500rpm check your label underhood for your curb idle setting second see if theres a adjustment screw you can increase were your gas cable lever rest against your set screw underhood if you feel confident enough remove your iac motor idle air control valve if the bore were the end of the pintle extracts out to close has varnish builup our carbon it will stick creating vacuum leak type senario causing stalling rough idle sometimes even no start conditions good luck

Posted on Sep 18, 2008

  • 1 Answer

SOURCE: I have a 1989 olds

I have the same problem too. Local chevy dealer says it's the fuel regulator.

Posted on Oct 08, 2008

  • 4 Answers

SOURCE: my 96 cutlass supreme will turn over but won't idle and dies

may have leaky injectors or fuel pump presure regulater

Posted on Jan 06, 2009

emissionwiz
  • 75197 Answers

SOURCE: 1993 olds cutlass supreme 3.1 multi port loading up at idle

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Apr 07, 2009

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My 1993 olds cutlass supreme idles fine until you step on the gas or when your going down the road at higher speeds than idle it has a hesitation what's the problem?


A flat spot on acceleration could be low fuel pressure or a faulty throttle position sensor. Could also be a vac leak such as a faulty EGR valve.
Is the check engine light on ?

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you most likely have a injector breaking down which is causing the quad driver in the computer which control the injector pulse to shut down .When a injector resistance is to low this will happen the correct resistance in ohms is 12.4 per each injector .This was a very common problem with 88 to 97 gm cars.have this zcheck at a reliable shop :)

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Hello there.....

First things first: Is the temperature gauge showing normal as it is supposed to be? No contamination of oil & water on withdrawing the oil dipstick? Head gasket not the culprit here? No excessive steam on idling from the exhaust system? If these signs are not present than I suppose there could be an air lock within the cooling system - bleed the system - check if the radiator/coolant reservoir cap is satisfactory. Top up the radiator (if possible) with mixture of water & antifreeze whilst the vehicle is idling. Hope this helps.

Good luck

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When i start up my 93 olds cutlass supreme it idles very high


Sticking throttle linkage, or faulty idle control system.

Jun 04, 2009 | 1993 Oldsmobile Cutlass Supreme

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1993 oldsmobile cutlass supreme engine stalls choking


soundl like idle air control valve sensor
try a clean .............if no better replace

Apr 30, 2017 | 1993 Oldsmobile Cutlass Supreme

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