Question about 1997 GMC Jimmy

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97 jimmy 4.3 stumbles on take off but runs fine then on

Changed spider, plugs, iac valve, to no avale. help please

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Thomas Costanza

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  • 3 Answers

Verify throttle position sensor voltage off idle. oscilloscope is best. on regulur voltmeter use min max

Posted on Aug 28, 2017

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Anonymous

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SOURCE: 1995 gmc Jimmy

timing is off try the timming senser

Posted on Oct 11, 2008

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Anonymous

  • 141 Answers

SOURCE: bad stumble on acceleration pops through t- body.

Sounds like the fuel pressure regulator. Could also be that the timing jumped. But I'm leaning towards the pressure regulator. Hope that I could help. Best wishes.

Posted on Jan 17, 2009

aandwmore

Apollo Morelos

  • 13 Answers

SOURCE: 97 JIMMY,PUSH 4X4 BUTTON,NOTHING HAPPENS

I had the same problem with my 99 Jimmy. try to disconnect your battery for about 5 minutes and see what happen. it fixed mine by doing it.

Posted on Feb 07, 2009

emissionwiz

Marvin

  • 85239 Answers

SOURCE: how can I to change or regulate the RPMs in my

Idle is controlled through the on board computer and is not adjustable, however after u cleaned the system you need to disconnect the battery for 5 minutes and then let the system relearn the idle speed, this takes about 30 miles of driving a combination of city and highway.

Posted on May 07, 2009

emissionwiz

Marvin

  • 85239 Answers

SOURCE: fast idle after warm up .already changed IAC valve

fast idle is many times caused by a engine intake vacuum leak, use a can of carb spray and spray the top of the engine for leaks, if u hit one u will hear the eng change idle speed, also look for split or leaking vacuum hoses.

Posted on May 20, 2009

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1 Answer

11997 jimmy 4.3 stumbles on take off, but runs fine after that


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I would start with the IAC (Idle Air Control) valve. The IAC valve usually, USUALLY, trips the Check Engine Light, but, sometimes may not.

Aside from that, it could be other issues: spark plugs, ignition wires, distributor components/assembly, etc.

BTW, is the Check Engine Light on?

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You might want to look at that injector for that cylinder.I worked on a GMC Jimmy that did the same thing and I also changed all the sensors come to find out that my injectors and the spider assembly needed to be changed.

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HI I have a 99 Jimmy with 4.3 engine. I have bad missing in the engine, I have replaced all wires, plugs, cap and rotor. I have replaced the EGR valve, I have replaced the fuel pump and now the injector...


Please help us. I have the same problem with my 99 Jimmy. I was driving on the highway going 70 and then it started missing. Changed all the plugs, wires, rotor and cap but to no avail. HeLP! please email me if you have a solution to this problem. ([email protected]) thanks a bunch.

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1995 jimmy 4x4 stopped running. mechanic said it was a fuel pump. Changed fuel sending unit, changed fuel pump, changed fuel filter also changed fuel spider about 3 months ago. I have gas pressure at the...


check for dryrotted vaccumm lines or off completely ensure all the fuses are good and make sure you have spark by testing it if you need assistance for this send me a reply back sounds as if the fuel is not getting through at this point

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2 Answers

Hard start when cold/first start in morning


The pressure relief valve is in the spider fuel injector not the fuel pump. We have had our 94 gmc jimmy for 4 years & have had to replace the fuel injector 4 times which cost right at $500 each time for the part. Yes the spider fuel injector cost averages around $500.

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1 Answer

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throttle position sensor,or egr valve,also check your air filter,if this helps please gine me a fix ya vote

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