hello i have a 1990 Isuzu pickup truck. the truck surges up and down . i have replaced all the vac lines. what now.

Asked by GuruT5MDG Jun 15, 2018 at 01:56 AM about the 1990 Isuzu Pickup S LB RWD

Question type: Maintenance & Repair

1 Answer

1,370

Check for codes. Unplug the throttle position sensor and see if anything different happens.

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