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
SOURCE: 1986 gmc jimmy fuel filter location
Check by lower rad hose in engine compartment, in fuel line.
SOURCE: Rough Idle on 1986 GMC Jimmy.
change your some sensors that can probably cause your engine to run rough, ask you local oarts store for more info...
SOURCE: i got a 1994 gmc s15 jimmy with the vortec 4.3 it
sounds like it could be a problem in the IAC circuit. The Idle Air Control valve manages how much air gets into the engine while @ idle. It receives commands from the ECM based on inputs from at least the mass air flow, coolant temp, throttle position and oxygen sensors
SOURCE: 95 gmc jimmy rough idle fuel in exhaust drives
Purchase new egr valve gasket with screen on it. The motor as it get older produces more carbon it then begins to break off and when the valve opens it get caught in there. i have cleaned mine several times and finally found the gasket at napa for around 22 bucks. All you need it 10mm wrech and 10mm socket with ext. takes around 10 min to do.
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