runs rough when I first start

1995 CHEVROLET TRUCK
108,000 MILES
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EVOHAWG
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  • 1 POST
Why does my 350 chevy tbi runs rough when I first start it and the smooths out and runs for a couple in min. and then dies and when I try to restart it it back fires threw the carb.
Jan 28, 2012 at 4:45 PM
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CJ MEDEVAC
  • CAR REPAIR CONTRIBUTOR
  • 11,004 POSTS
CHECK ENGINE LIGHT ON?

LAST TIME YOU PERFORMED A FULL TUNE-UP?

KEEPING UP WITH SCHEDULED MAINTENANCE AS OUTLINED IN A MANUAL (LIKE A CHILTON OR HAYNES, REPAIR MANUAL) ??? ....OWNERS MANUAL MAY NOT GO IN DEPTH ENOUGH

JUST A REAL GOOD "GOING OVER" MIGHT REVEAL SOMETHING UNPLUGGED, A CRACKED OR VACUUM LINE, OR ONE JUST PULLED LOOSE.

ONE MUST ALSO REMEMBER THE VEHICLE MAY NOT OPERATE "FULL PEAK" EFFICIENCY, UNTIL IT WARMS UP TO NORMAL OPERATING TEMPERATURE AND ALL SENSORS ARE ONLINE....RUNS CLOSED LOOP AT START (RUNNING ON FACTORY PRESET VALUES). THEN OPEN LOOP WHEN ALL SENSORS PROVIDE THE COMPUTER "REAL TIME INFO" (LIKE THE O2s, THEY DON'T WORK RIGHT UNTIL THEY GET HOT)

YOUR TURN

THE MEDIC

Jan 28, 2012 at 5:06 PM
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