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.
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JACOBANDNICKOLAS
CAR REPAIR CONTRIBUTOR
110,190 POSTS
Hi,
If you hear a back fire, there are only a few things that can cause it. If the timing is good and compression isn't an issue, chances are you are getting too much fuel. Take a look through this link and let me know if it helps. Also, let me know if there are any diagnostic trouble code and if you have a live data scanner. If you do have the scanner, I need to know what the short term fuel trims are.