GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual

Poor High Speed Operation


When the engine cannot maintain high speed operations, check for the following, as necessary:

A faulty fuel pump producing low fuel volume.
A restriction in the intake manifold.
A worn distributor shaft.
Unadjusted valve timing.
Leaking valves or worn valve springs.
Fault with the computerized engine control system.