1976 Other Chevrolet Models Exhaust backfire one side of mot

1976 CHEVROLET
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WOLF56IL
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  • 1 POST
Noises problem
1976 Other Chevrolet Models V8 Two Wheel Drive Automatic unk miles

I have a 305 cu motor in a 1955 Chevy. Car sat for quite a while. Replaced exhaust headers and installed new plugs. Started up but is backfiring from pass side exhaust header. Nothing noted from other side. Removed plugs and one seemed to be fouling out.
Could this be a problem with plug wires or distributor cap?
Mar 19, 2009 at 6:08 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
To miss fire out exhaust a plug must fire when exhaust valve is open. Check firing order and cap for carbon arching. If all good run compression test
Mar 19, 2009 at 6:33 AM
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