1991 Chevy Cheyenne engine

1991 CHEVROLET CHEYENNE
300,000 MILES • V8 • 4WD • MANUAL
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SCOTTNALICIA
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  • 1 POST
My truck won't stay running unless you keep your foot on the gas and when doing so its back firing and shooting flames from the fuel injectors
Jul 31, 2010 at 8:24 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
short each cylinder out by removing plug wires from plugs one at a time. When you find the offending cylinder check for compression, it may be either a bent/broken pushrod or valve spring/valve or burnt valve..
Aug 29, 2010 at 8:29 PM
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