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Re: TBI slow to return to idle
Hey everyone! Im a new guy here and am curious if the O2 sensor could have anything to do with it. I have a 92 TBI454 running on the old 350 harness with a custom chip. When i put the exhaust back together (fabbed from the Winnebago doner of the 454, 16,700 miles!) the O2 bung ended up a couple of feet farther back. It works but i get occasional O2 codes which go away after punching the accelerator. Said all that because mine idles VERY high when cold but acts better hot. Mileage should be better but im gonna try a heated O2 and report back. If i understand correctly, the O2 sensor regulates fuel mixture and will default to VERY rich if not working optimally. Just a stab in the dark......
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