HELLLLPPP Engine start up probs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

andrew king · 10-14-2004, 06:00 PM

I jsut tried to fire my new 454 and it starts and runs for a minute and makes a harsh backfire thru the carb and dies ?? Ignition timing? valves adjsuted incorrectly?
Im getting ready to leave for work offshore for two weeks and wanted to at least break in the cam before i go andy help would be great

TurnNBurn · 10-14-2004, 06:44 PM

Do you maybe have an intake valve sticking. or timing could be off
or maybe even an air leak

SanitysBane · 10-14-2004, 07:26 PM

i would check timing

10-14-2004, 06:00 PM	#1
andrew king Registered User Join Date: Apr 2004 Location: Susanville CA, home of 6000 convicts lol Posts: 157	HELLLLPPP Engine start up probs I jsut tried to fire my new 454 and it starts and runs for a minute and makes a harsh backfire thru the carb and dies ?? Ignition timing? valves adjsuted incorrectly? Im getting ready to leave for work offshore for two weeks and wanted to at least break in the cam before i go andy help would be great

10-14-2004, 07:26 PM	#3
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	i would check timing __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

10-14-2004, 06:44 PM	#2
TurnNBurn Registered User Join Date: Oct 2004 Location: North Dakota Posts: 103	Do you maybe have an intake valve sticking. or timing could be off or maybe even an air leak



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