5.7 liter 350 chevy pickup cranks but wont start backfires through throttle body while cranking it over?
Jan 30, 2012 at 6:33 PM
backfires through throttle body
1996 CHEVROLET CHEYENNE
DARRYL10
- MEMBER
- 2 POSTS
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DOCFIXIT
- ✓ASE Certified Mechanic
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It sounds like the engine has lost timing like the timing chain has jumped. Here is a guide to help you check the timing chain.
Here is a guide and the timing chain diagram below so you can see whats going on.
https://www.2carpros.com/articles/engine-backfires-while-running
Check out the diagrams (Below). Please let us know what happens.
Cheers
Here is a guide and the timing chain diagram below so you can see whats going on.
https://www.2carpros.com/articles/engine-backfires-while-running
Check out the diagrams (Below). Please let us know what happens.
Cheers
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Jan 30, 2012 at 6:40 PM
Yep the timing chain was gone! I replaced it but the engine had bent valves so I junked it, thanks for your help though.
Jan 30, 2012 at 6:46 PM
DOCFIXIT
- ✓ASE Certified Mechanic
- 18,828 POSTS
Use 2CarPros anytime, we are here to help. Please tell a friend.
Cheers
Cheers
Jan 30, 2012 at 6:48 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.