1998 Chevy Blazer rough idle

142,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JAMES.T.TRAHAN
  • MEMBER
  • 1 POST
i recently rebuilt my blazer. when i finally got it running again the idle is very rough but evens out above 1500 rpm. also the check engine light comes on and blinks at around 3000 rpm. i tried to read the codes but its like the vehicle never gets plugged in to the obd2 scanner. what could be the problem with the idle? also it shakes bed enough to rattle the change in the ash tray.
Aug 13, 2009 at 1:01 AM
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JMALECKI
  • ✓Experienced Mechanic
  • 118 POSTS
hello
a couple of things to check timing may be off also check the egr valve it may be stuck slightly open due to carbon.
John
Aug 13, 2009 at 1:08 PM
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