Question about 1995 GMC Jimmy

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95 jimmy has rough idle and no communication from the computer to the data connector i have replaced the computer and no difference....

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Hi...

as you already replaced the computer please check the data connectors. the wires in it might have damaged and the signals are intrepted. so please check

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Posted on Jul 11, 2010

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1 Answer

01licoln navigator missing


Check the fuses. Usually the data link connector is powered of an accessory fuse or the cigar fuse. If the fuse is blown than there will be no communication with the computer. Once the fuses are checked and any blown ones are replaced bring it back to have it scanned.

I agree that it sounds like a coil.

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My 95 jimmy is running rough, shaky at idle. I had a guy hook up the scanner and my computer could not hook up. Could not find problem that way. Could it be a sensor?


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Thank you for using fixya, and be safe.
http://www.seafoamsales.com/ http://gmcowners.com/gmc-forum/showthread.php?t=13770

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1 Answer

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How do I get the trouble codes from a 1995 GMc Jimmy? I has the obdII connector but my code reader wont communicate.


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2 Answers

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1 Answer

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1 Answer

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1 Answer

My 95 cougar with 3.8 has rough idle


Your car has serious issues, far above a simple forum like this one. My guess is that your throttle body assembly is clogged with soot. It will have to be be removed and the TPS and Idle control valve removed. The Throttle Position Sensor could be your problem, if the spring is broken... this is uncommon but possible. The throttle body will have to be cleaned, soaked over night in gallon container of choke and throttle body cleaner. It is easy to remove, just be careful with the electrical connectors to the sensors. A simple 3/8 in racket set is all you will need. (Go to an Autozone and have them run a free diagnostic on your car's computer and they will give you a free print-out and tell you which parts are faulty, first thing.) A faulty Idle control valve with cause the rough idling, don't try to clean it... just get a new one, if it's sooted up.

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