back fire

1989 CHEVROLET TRUCK
6 CYL • 2WD • MANUAL
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MARK DISKEVICH
  • MEMBER
  • 2 POSTS
i have an 1989 chevy c1500 5speed when shifting from 3rd to 4th and 4th to 5th when the clutch is engaged i get a back fire the engine has over 300000 miles
Feb 14, 2011 at 11:16 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the air injection system/check valve and diverter valve-
Feb 14, 2011 at 11:19 AM
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MARK DISKEVICH
  • MEMBER
  • 2 POSTS
where is that located
Feb 14, 2011 at 11:20 AM
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