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Re: 96 Chevy C1500 random misfire problems
Welcome to the forums.
First thing you need to do is check the fuel pressure or have it done for you. Low fuel pressure can cause cruise speed missfires. Low catalyst efficiency can also be caused by low fuel pressure misfires. O2 sensor behind the cat is there only to monitor the cat activity. The ecm uses the upstream cat to make fuel adjustments.
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Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
primer is finer
91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said.
I stand for the flag and kneel at the cross
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