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My 1991Caprice classic idel rough and surges can this be sensors???

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  • 17 Answers

MOST LIKELY TUNE UP OR A VACUUM LEAK SOME WHERE. LOOK UNDER THE HOOD FOR ANYTHING THAT IS MAKING A WHISTLING SOUND OR SUCKING SOUND

Posted on May 08, 2014

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6ya6ya
  • 2 Answers

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

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Posted on Jan 02, 2017

  • 17 Answers

SOURCE: 1985 corvette

you might want to replace the plug end. I had a 99 neon with the same ploblem changed the sensor but the plug was shorted, changed that and it run great ever since.

Posted on Jun 27, 2009

Molson02536
  • 3854 Answers

SOURCE: low idel rough

You could have a Air Idle Control valve or sensor problem. Your going to have to scan the ECM to find out if it is your (IAC).
Here is how to check your ECM for Codes. 
On board diagnostic (OBD) was designed on vehicles equipped with electronic fuel injection so you can generally retrieve the codes yourself. No need buying a scanner or running to any parts stores to check th3 Engine Light. This system is called obd1 and applies to most vehicles made before 1995 for domestics and 1993 on imports. In this article, I will discuss the methods used by domestic vehicle manufacturers on how to check the engine lights in their cars and trucks.
For GM domestic vehicles made before 1995, the diagnostic connector is located under the dash panel by the driver side. To get the check engine codes to flash in your dash panel, use a jumper wire or a paper clip and connect terminals A and B of the diagnostic connector. Turn your ignition key on with engine off and the codes should start to blink. All codes should start with code 12 which is one long flash followed by 2 short flashes. This code 12 means the diagnostic system is normal and will repeat itself continuously if there are no trouble codes. Otherwise, code 12 will flash 3 times before flashing the fault codes.
The codes can be erased or cleared by disconnecting the battery negative terminal for 1 minute and reconnect. Just make sure to check your service manual in case you have electronic equipment such as radio or clock that needs reprogramming in which battery disconnection is not recommended. Finally after performing repairs on the culprit code, always go for a road test to confirm if the problem is fixed.
Good Luck and here is a link for gm codes.http://chevythunder.com/199295_lt1_trouble_codes.htm#Code

Posted on May 02, 2009

  • 236 Answers

SOURCE: vehicle had recent head gasket

Check egr valve, gasket, vacuum line. vacuum leak or sounds like to me.

Posted on Jun 06, 2011

  • 3 Answers

SOURCE: i have a rebuilt motor just installed the truck

TIMING,,,,,,,,,,,PUT THE TIMING LIGHT ON IT,,,,,,

Posted on Jul 15, 2011

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Thread: 6.0 V12 XJS High RPM When Warm - Jaguar Forum.co.uk

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1985 corvette


you might want to replace the plug end. I had a 99 neon with the same ploblem changed the sensor but the plug was shorted, changed that and it run great ever since.

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