Mechanics

GMC JIMMY ENGINE PROBLEM

2000 GMC Jimmy • 119,000 miles

4X4 - Engine surges - RPM gage jumps around starting at about 55 mph No codes or check engine lights. What should I check first - I have been told to change transmission fluid and the cylinode. Need your help
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Harley74
December 26, 2012.



How does the motor run?

Forget about the trans, lets see what the actual issue is

Roy
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ASEMaster6371
Dec 26, 2012.
Surges at 55 mph - engine runs ok - no codes - no check engine light started after sitting for about a month

Tiny
Harley74
Dec 26, 2012.
I would think an issue with the tach itself if the motor is running ok.

Check connections at the coil and the back of the cluster

Roy

ASEMaster6371
Dec 26, 2012.
2000 GMC Jimmy starts and runs OK, except when you might say it surges and lacks power a little. The tack jumps around when this happens.

Tiny
Harley74
Dec 27, 2012.

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