Question about GMC Jimmy
Yes and it has been the only option all along
could be the injector seals , faulty dribbling injectors , injector control and excessive fuel pressure from a problem pressure control valve
Posted on Jul 13, 2017
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Posted on Jan 02, 2017
SOURCE: rough idle and lopes
Those 4.3L's have a Central Port Fuel Injection system with one injector in the middle of the intake under the plenum, they are good for either the fuel pressure regulator or the plastic lines (that are inside the intake that feed the injector) leaking inside and flooding the intake with fuel. The best way to tell is to take the plenum off and thurn the key to prime the fuel pump and watch for leaks.
Posted on Nov 18, 2008
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
To check EGR valve, plug the vacuum hose to it, and it should not get hot anymore. It if does, it is leaking.
But gas smell is usually bad plug wire or plug.
With good insulation, remove one sparkplug wire at a time, to see if one has no effect. That is the target.
Posted on Jul 25, 2009
On mine I usually pulled the old EGR and removed the carbon; it's a very common thing on the 4.3L V6 with TBI- chunks of carbon from a design flaw are the cause, but usually the EGR can be cleaned without completely replacing it...
Posted on Nov 27, 2009
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