1999 S10 4.3 Vortec Initial start, but won't run.

Asked by Oct 14, 2018 at 06:04 PM about the 1999 Chevrolet S-10 LS Extended Cab 4WD

Question type: Maintenance & Repair

I have a 1999 S10, 4.3 Vortec. It will fire at first, then won't run. I have installed
new fuel pump, Relay, and Regulator. Get 60lb's, and bleeds to around 50lb's
after pump runs.

1 Answer


Faulty ignition coil, mass airflow sensor, fuel pump. Your car has an ignition or fuel pump problem. You're either not getting proper fuel or spark. Really could be either. The car should be giving you codes that tell you what part of the car is defective. You just have to get the car to a car parts store or to a dealer for the codes to be read.

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