1999 GMC Jimmy engine

RYANFORTIN

MEMBER
1999 GMC JIMMY
6 CYL
4WD
AUTOMATIC
157,000 MILES

I have a vortec 4.3L and when I accelerate the RPM go up but the speed wont increase very fast. Also when I get going the engine will struggle and pulsate. I checked the fuel filter and air intake. The Mass flow air is new. Can you help me please?

Thursday, January 10th, 2008 AT 2:21 PM

1 Reply

TRUCKCHEVY4

MEMBER
23 POSTS

To me that sounds like something in the drivetrain possibly trans. Or rear end or could be torque converter I would have that looked at.

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1999 GMC Jimmy engine

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