94 Backfires.
#1
94 Backfires.
I have a 1994 2500 with a 5.7. It has the Throttle Body Injection. When I am decelerating or especially idling down a long hill in a low gear so I will not go to fast my truck will backfire very loud. Not just your normal small little backfires that you will usual get. But loud bangs about every 4 to 5 seconds. Im suprised my muffler isn't blown up yet. Is my truck running rich. I'm told you can't adjust a TBI. Could it be I am not running a correct spark plug. Maybe I could use a hotter plug. I am also getting terrible gas mileage. Mabye they both are caused by the same problem. Any help would be great. Thanks.
#2
My 92 4.3 S10 Blazer does this. Turns out the fuel pressure was not correct. I r&r'd the fuel pump and it ran fine. My dad then insisted on replacing the wires and it's doin it a little bit. Dunno why.
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gumbute
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February 29th, 2020 11:26 AM
dkerns2004
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April 6th, 2008 10:16 PM