RUNS STRONG WHEN COLD BUT SEEMS TO LACK POWER

  • Tiny
  • Dshenry
  • 1993 Chevrolet Blazer
  • 138,000 miles

I have a 93 K1500 Blazer 4x. 5.7L 138000 miles, runs strong when cold but seems to lack power when up to temperature. I have replaced the dist, cap, rotor button, plugs and wires, egr and PVC, fuel filter and cleaned tbi. No codes are showing. What could this be? Cat?

Tuesday, September 25th, 2012 AT 2:37 PM

1 Answer

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,549 posts

Check fuel pressure, check back pressure from cat converter and check the coolant sensor

Roy

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Tuesday, September 25th, 2012 AT 3:18 PM

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