GM Astro/Safari 1985-1996 Repair Guide

Poor High Speed Operation

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When the engine cannot maintain high speed operations, replace or repair the following items or systems, 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.
 

 
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