Question about 1995 GMC Jimmy

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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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Theirs a wire behind the computer unplug and restart the vehicle if it runs good you need a distributer common problem

Posted on Nov 09, 2010

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Common for the EGR valve to get dirty with carbon and causing it to stick open. Start with the simple and clean your EGR valve and throttle body, if the EGR valve is to far gone to be cleaned. Your going to have to replace it,you can use Deep Dreep made by Seafome and would be a good idea also to give your Jimmy a Seafome treatment.
Use two cans and follow the instructions on the can and thins should bring life back to your engine.
Thank you for using fixya, and be safe.
http://www.seafoamsales.com/ http://gmcowners.com/gmc-forum/showthread.php?t=13770

Posted on Jul 09, 2010

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Hi guy is that a Vtec engine seem like EGR valve stuck open

Posted on Aug 07, 2010

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1 Answer

My 1992 gmc jimmy idles at 1300 rpm or higher is there a way to adjust the idle?


No, it is computer controlled. You have an issue that is causing this, and will need a live data scanner hooked up to diagnose. You could have a Mass air flow sensor issue, throttle position sensor, or even an air leak at the intake.

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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....


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

if my answer were useful please vote for me

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Try cleaning the EGR, there common to carbon build up on the 95 JImmy's.

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w/o much more info it sounds like it needs a good tune up plugs wires fuel filter pcv vave throttle bore clean and injecter clean,try to do most of this your self it is costly

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