GM Blazer/Jimmy/Typhoon/Bravada 1983-1993 Repair Guide

Poor High Speed Operation

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

  1. A faulty fuel pump producing low fuel volume.
  2.  
  3. A restriction in the intake manifold.
  4.  
  5. A worn distributor shaft.
  6.  
  7. Unadjusted valve timing.
  8.  
  9. Leaking valves or worn valve springs.
  10.  
  11. Fault with the computerized engine control system.
  12.  

 
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