1999 GMC C3500 engine backfiring through exhaust while cran

1999 GMC C3500
100,000 MILES • V8 • 2WD • AUTOMATIC
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JOURNEYME
  • MEMBER
  • 1 POST
while cranking the engine there is backfiring in the exhaust & motor will not start. can u please tell me what the likely causes are?
Nov 12, 2008 at 3:50 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the fuel pressure and ignition timing
Nov 12, 2008 at 4:12 AM
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