1994 Chevy Blazer

1994 CHEVROLET BLAZER
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REVSCOTT
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  • 3 POSTS
Engine Mechanical problem
1994 Chevy Blazer V8 Four Wheel Drive Automatic 68.000 miles

my chevy was running rough, so i took it and run a scan, and it showed a bad egr, and a bad knock sensor. I put egr in and it does run better, but it idles really rough, and when you take off if really hesitates. Would the koock sensor have anything to do with that, or could it be something else.
Dec 12, 2008 at 9:47 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Clean out the idle air control valve and test it to include the throtttle position sensor. The KS's job is to retard the ignition timing when it senses pinging/vibration-
Dec 13, 2008 at 2:49 AM
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