1992 gmc sierra 4.3 losses power in 5th & 4th gear

Asked by Oct 06, 2013 at 01:24 PM about the 1992 GMC Sierra 1500 C1500 Standard Cab LB

Question type: Maintenance & Repair

no back fire, but loses pwr in higher gears. ok if I shift down

3 Answers

88,655

Replace the fuel filter then check fuel pressure and flow

Best Answer

Thanks..

80

most likely fuel pump or pressure issue. high gear at highway speeds while trying to slowly accelerate is a high load condition-pump may not be able to handle the demand.

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