slow response

2004 CHEVROLET TRAILBLAZER
80,000 MILES
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SINBAD271
  • ✓ASE Certified Mechanic
  • ASE Certified Mechanic
  • 169 POSTS
First it would stall at times at a light, have low idle at a light, I cleaned throttle body, I retrieved codes for cam sensor , crank sensor collation. Cleared codes. Test drove now it seems to hesitate on take off from a stop. Is it possible the computer has to be flashed or am I over looking something? Engine size is 4.2liter
May 19, 2013 at 8:19 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
rescan it see if you get same codes and check fuel pressure
May 20, 2013 at 7:15 AM
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SINBAD271
  • ✓ASE Certified Mechanic
  • 169 POSTS
  • ASE Certified Mechanic
Check your timing marks may be off .
May 20, 2015 at 8:57 PM
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