GM Astro/Safari 1985-1996 Repair Guide

Low Power Output of Engine

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When the engine power output is below normal, replace or repair the following items or systems, as necessary:



Overheating of the cooling system.
 
Leaks in the vacuum system.
 
Leaking of the fuel pump or hoses.
 
Unadjusted valve timing.
 
A blown head gasket.
 
A slipping clutch disc or unadjusted pedal.
 
Excessive piston-to-bore clearance.
 
Worn piston rings.
 
A worn camshaft.
 
Sticking valve(s) or weak valve spring(s).
 
A poorly operating diverter valve.
 
A faulty pressure regulator valve (Auto. Trans.).
 
Low fluid level (Auto. Trans.).
 

 
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