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 7:16 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Check the air injection system/check valve and diverter valve-
Feb 14, 2011 at 7:19 PM
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MARK DISKEVICH
  • MEMBER
  • 2 POSTS
where is that located
Feb 14, 2011 at 7:20 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.