Question about 2001 GMC Jimmy
My jimmy rpm at idle has started running at very high idle already caused one accident due to high rpm at red light
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Posted on Jan 02, 2017
SOURCE: 1995 Jimmy Rough Idle
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
Posted on Jan 18, 2009
best thing to do is go to a big parts store and have them scan error codes usually they do for free and they can help find whats wrong u find how to repair, a chiltons manual for around $25 can help u with many repairs with diagrams and step by step help, also u can call several parts stores ahead of time and ask if they do free scans
Posted on Jul 08, 2009
this is related to the egr system and makes sense when you describe a rough idle. the egr is probably stck open slightly. remove and attempt to clean with carburretor cleaner. it also helps to have a vacuum pump so you can work the diaphragm up and down. happy holidays
Posted on Dec 28, 2009
You have a vacuum leak somewhere. Possibly an intake manifold gasket or a vacuum hose that has come off. Open the hood with engine running and see if you can hear a hissing sound. You can also buy a can of aerosol carb cleaner and try spraying it at suspect locations. The carb cleaner will cause the engine speed to change if you hit the spot where the leak is.
Happy New Year,
Posted on Dec 31, 2009
SOURCE: 1996 gmc jimmy 4.3 v6
You should have your fuel pressure checked the problem is one of two things It is either your fuel pump or your fuel pressure regulator. It goes to high idle because it is starving for fuel.
Posted on May 01, 2011
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