1990 Chevy Truck backfiring

1990 CHEVROLET TRUCK
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CHIZELLE1
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  • 2 POSTS
Engine Mechanical problem
1990 Chevy Truck V8 Two Wheel Drive Automatic

when i try to start it, it will start,run and idle until i cut it off, then it won't start again and it seems like the exhaust is getting clogged up and it backfires really bad. what could be causing that?
Feb 22, 2009 at 12:36 PM
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BMRFIXIT
  • ✓Experienced Mechanic
  • 19,053 POSTS
Check it for tune up
check coil
Feb 22, 2009 at 1:03 PM
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CHIZELLE1
  • MEMBER
  • 2 POSTS
i have already done a tune up, replaced the oxygen sensor, and the pcv valve. It seems to clog up after running for a while and then starts backfiring. If I turn it off, it won't start again. Any other ideas?
Feb 22, 2009 at 1:10 PM
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BMRFIXIT
  • ✓Experienced Mechanic
  • 19,053 POSTS
Check the COIL
do a fuel test
check EGR valve
Feb 22, 2009 at 1:54 PM
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