Question about GMC Jimmy

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1995 gmc jimmy idles rough runs perfect on hwy. Gets only 215 miles out of a tank of gas and when starting and idling you can smell nothing but gas. It is hard to start have to hold key for awhile before it turns over. Parts that have been replaced fuel pump, fuel filter. spark plugs&wires, egr valve, coil, and one sensor, have not replaced the map sensor. What I want to know is my last option the injectors? Thanks

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  • GMC Master
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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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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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frostwireguy
  • 46 Answers

SOURCE: 1995 gmc Jimmy

maybe bad ignition module or coil.. when they get hot sometimes they wanna die...

Posted on Sep 17, 2008

  • 58 Answers

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

  • 217 Answers

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

kirkx
  • 2019 Answers

SOURCE: 1995 gmc jimmy 4x4 rough idle smell gas from tail pipe

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

  • 10 Answers

SOURCE: I have a 1995 GMC Jimmy,rough idle, carbon smell,

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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1 Answer

Just bought 2000 jimmy with 108 miles i put on runs rough all of the sudden and barley idles, started to do this after accelerating quickly for less than 1/3 mile


engine rough at idle only?
is the check engine lamp on?
remove egr valve
start engine to blow out carbon
check egr to see if there is carbon holding the valve open
clean valve
reinstall retest

Aug 10, 2010 | 2000 GMC Jimmy

1 Answer

When my 1996 Jimmy gets to a half a tank the gas gauge goes crazy and will go to empty then back to half. I acts like it is running out of gas. It also has a rough idle. What could be causing this...


The wire harness to the fuel pump sending unit may be going bad which is common to happen. The harness is around $15.00 and it runs from the frame to the top of the gas tank. The other thing to is the fuel pump sending unit may be going bad and the float in side that measures the amount of gas, has gone bad and the unit may need to be replaced. As for the rough idle, it cold be related to the fuel pump starting to go bad and the fuel pressure is just marginal to keeping the engine running. The fuel pressure during cold start should be 62-65 PSI and should drop about 5 PSI when the engine is running. The other thing to that would casue a rough idle, would be time for a tune up, "spark plugs, wires and distributor cap and rotor, fuel filter"

Feb 08, 2010 | 1996 GMC Jimmy

1 Answer

Truck starts, runs for 5-10 seconds, then dies


take out your mass airflow sensor located on air intake pipe and clean with brake cleaner also is your engine light on?

Jan 04, 2010 | 1999 GMC Jimmy

4 Answers

I have a 1995 GMC Jimmy,rough idle, carbon smell, strong gas smell coming from the left driver side, check engine light is on. Has a hard time turning on...Any suggestions?


My 94 Jimmy had similar problems, until the dirty EGR valve was replaced. We tried a million things, first. But the improvement with the new EGR valve has HUGE.

Nov 17, 2009 | 1995 GMC Jimmy

1 Answer

I got a 1994 gmc s15 jimmy with the vortec 4.3 it idles rough but whaen i drive it give it gas it runs great what would cause that.


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

Sep 29, 2009 | 1994 GMC Jimmy

2 Answers

1995 gmc jimmy 4x4 rough idle smell gas from tail pipe


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.

Jul 25, 2009 | 1995 GMC Jimmy

1 Answer

Engine running rough, hard starting


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

Mar 20, 2009 | 1995 GMC Jimmy

1 Answer

91 jimmy starts cold, runs rough hot, dies when put in drive


Try to unplug the mass airflow sensor and start it. It will idle higher but should run fine. If it works then you need a MAF sensor. Be sure you have an OBDII code puller to clear the computer when done

Jan 25, 2009 | 1995 GMC Jimmy

1 Answer

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

Jan 16, 2009 | 1995 GMC Jimmy

2 Answers

1995 gmc Jimmy


maybe bad ignition module or coil.. when they get hot sometimes they wanna die...

Sep 16, 2008 | 1995 GMC Jimmy

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