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SUVs GMC Jimmy GMC Jimmy Starting and Stalling Problems
231 messages, Last post on Nov 13, 2009 at 1:49 PM
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Replying to: steelerfan67 (Jul 29, 2009 8:50 pm) Two things I can think of at little to no extra costs... 1)Replace Temp. sensor/sender to the computer...NOT the sender to the guage. Inexpensive part to replace. Shop around...NAPA, Advance, etc., for best price. 2)Idle Control Valve (ICV). Clean it...may be sticking or STUCK in the "cold" position?? I hate throwing parts at a car hoping to solve the problem. Hope I helped? jonny |
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My jimmy bogs down if i step on the gas and when i let up it smooths out. I had the fuel pump replaced feb 09 and that now has a high pitched whine. Does anybody know what could be wrong? Are both problems related?
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Replying to: rockclimber2 (Aug 01, 2009 1:42 pm) A??: I'm no fuel injection expert, but when you step on the gas pedal, you are actually opening the throttle plate (the butterfly valve directly attached to your gas pedal via a cable)....which let's in a large amount of air (oxygen). So when you "step on it" and it "bogs"...it appears that it is not getting the increased fuel necessary to mix with the increased air you are letting in? So why is it not getting the increased fuel needed? First check your fuel pressure at the fuel rail (I covered that with photos in an earlier post). If the fuel pressure is good (60lbs?? I forget..look at the photo) then it sounds like an electronic problem. Attached to the side of the throttle body (right next to the butterfly throttle plate) is a little electronic box called the Throttle Position Sensor (TPS). It has some wires that run from it....into the engine wiring harness and ultimately to the Engine's computer/brain/Electronic Control Unit (ECU). This friggin' TPS thingy is supposed to tell the computer the position of the throttle plate and regulate (tell the computer/brain/ECU) the added fuel needed for the increased air added? This TPS might be the problem? It may be bad? ( Lightly rap/tap on the TPS with the handle of a screwdriver to see if it "jars" it back into working order?) Or, the TPS may be good and the area in computer/brain/ ECU linked to the TPS bad? (That would require a NEW or Used "Junkyard" ECU). I'm sure the TPS is less expensive than the ECU. As I stated, I'm no expert, but do know a little bit and this makes sense to me. Or I may be the blind leading the blind? Let me/us know how you make out jon 8-) God I strongly dislike Fuel Injection when it malfunctions and you need to have equipment to pull codes and what not! Nothin' better than a good ol' simple carburetor , IMO.
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Replying to: jonnyring (Aug 01, 2009 9:49 pm)
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Replying to: rockclimber2 (Aug 02, 2009 4:01 am) Oh, I didn't know it was an intermittent problem...I thought it was permanent and wouldn't drive...just idle. This "high pitch" sound...is this all the time or just when it "bogs"? Sure, change the filter..can't hurt. Still it could be "intermittent" as far as the TPS/ECU are concerned. Change filter and see if it cure's it. Filter should be located inside frame rail, drivers side, forward of tank= simple and quick change. If that doesn't do it...check fuel pressure= that'll determine the pumps' status. If all that is good.. look into TPS "tapping on it" and/or replacing it. _____________________________________________________________ "another problem is starting after driving it and shutting it off after about 15 minutes it starts hard it turns over about 7 times and starts but, in the morning after sitting it starts right up. whats your thoughts on this ?" Fuel system VAPOR LOCK. I don't know how to fix this yet..google it. I have the identical problem on an '86 BMW 535i Dirt Ralleye car. When I beat on it hard....it doesn't wanna start until it cools down. Haven't researched it yet. jon
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Replying to: jonnyring (Aug 02, 2009 5:58 am) |
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| Pulled out of driveway and truck died. Intermittent electrical and wouldn't stay on long enough to get it back to the driveway. Jiggled the battery and heard a click in the fuse box on the other side of the engine. The running lights came on and I could get the key out. New battery, fuel pump, and radiator. | |
| i have a 99 jimmy 2dr standard.. have trouble starting when wet,no problems when weather is dry and sunny.. what might the problem be? maybe spark plugs? bought it used about 6 or so yrs ago and have not changed them yet.. | |
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Just shut down on me while coming home last night. Try to start and it tries, but sounds like it is dieseling then shuts down. Cranks over, but will not start. Temp was a little high when it shut down. Fuel pump? Temp sensor? Pulled dip stick, no H2o. Only 76k on this vehicle.
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Replying to: kdp1996jimmy (Aug 21, 2009 7:02 am) |
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