my 2000 jimmy lurches between 40 and 50 mph. know why?

Asked by Jan 18, 2014 at 12:49 AM about the 2000 GMC Jimmy 4 Dr SLE 4WD SUV

Question type: Maintenance & Repair

when it gets between 40 and 50 it lurches and the rpm needle bounces.

2 Answers

I'd take a look at the EGR valve for correct operation....might be choked off with carbon....the IAT sensor can cause a rich condition too~ the fuel pressure regulator can starve of fuel as well if is not working correctly....just a few...get your OBD-II diagnostic codes read with a 15 dollar scanner~

could this be a spark related the ignition wires come too close to the hood 'cause the motor mounts are allowing this change in geometry which shorts out the high tension system~....just another thought~

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