Question about 1996 GMC Jimmy

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96 jimmy runs great at first then when the temp gos up under the hood starts to lack power thjen evenually dies....20 minutes later starts and will drive again and engine does get hotter then 170 degrees F

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I was having a similar problem and where the more gas I gave the slower it would go, sometimes even backfiring. If I threw in neutral and restarted it was fine for 2 mins again. It was the comshaft positioning sensor wich is under the rotor. remove the cap and you will see the wires, the black part inder the metal circle deal.

Posted on Jul 28, 2009

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Check for water in oil on dipstick. head gasket? head cracked? need more diagnostics and info.

Posted on Jul 16, 2009

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96 Jimmy runs better in cold weather than warm


Hi Buc, have a look at all the intake manifold ducting and make sure nothing is broken and leaking air. Also make sure that all vacuum hoses are fitted tight and correctly and they are not loose, broken or cracked. It will be better to check each by disconnecting, checking and refitting. Let me know how you get on. Have a happy new year. Regards John

Dec 31, 2012 | 1996 GMC Jimmy

1 Answer

1975 351W with 2 bbl carb, runs great for about 10 minutes, then dies.


Chances are it is the ignition box on the fender. It controls the ground signal to the coil and the timing.
If you can duplicate the problem and get it to "not start" you could test the box. Otherwise it may be tough to troubleshoot.
There's a chance something is going on with the pickup coil in the distributor too.

Sep 26, 2012 | Cars & Trucks

2 Answers

96 GMC Jimmy starts okay but dies after about 10 minutes. It will start again after sitting for awhile, then dies again. Have changed the fuel filter and pump...any other ideas?


If you have replaced the fuel pump and filter I would still check the pump pressure when it wants to die. Check for any trouble codes in the system also.

Sep 05, 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

2 Answers

Car cut off, won't restart, later cranks up fine , no fault code


had same problem with 2000 dodge ram. would run great then start to buck then die.let sit would start then same thing. it took some time for the crank shaft position sensor code to pop up. changed sensor (very easy) good ever since.

Feb 12, 2009 | 1994 Buick LeSabre

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