88gmc 1500, it dont have no take off power, but once it warms up it goes, but once I slow down it is hard to pick up speed again. I have changed spark plugs , wires,cap & rotor, fuel filter & o2 senso

Scotty Kerry

Asked by Apr 09, 2015 at 09:42 AM about the 1988 GMC Sierra 1500 C1500 Standard Cab LB

Question type: General

it mainly does it in the a.m.

2 Answers


Have you checked the fuel pressure and flow? There is a fuel strainer inside the tank that can get plugged up. There could also be a sensor misread for engine control, have you had a sensor scan performed?


Scotty, it sound like it's your tranmision as if it is starting in 2nd gear. i would start looking there first since you did a tune up on it.

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