quick autotap question?
Thread Starter
TECH Resident
Joined: Apr 2003
Posts: 791
Likes: 0
From: Tulsa, Ok
quick autotap question? ok, i recently bought autotap when my car started to missfire really bad. at first i thought it was just plugs so i changed them. but, my ltrms were still bouncing around like crazy. then i changed the o2 sensors and found that i had blown out 1/3 of the gasket that connects the header flanges to the exhaust flanges. so, i replaced that (with a copper gasket) and started it back up and made some logs. well, my ltrms stay pretty stable now. they're allways around 0% so i think they're fine. however, my o2's still bounce around some and since i never had autotap before the car was messed up i don't know if this is normal or not. so, basically, i just want to know, is it normal (while driving around town) for the o2's to move around? since the ltrms are staying steady i think everything is working right now. i just want to make sure.
TIA
TIA
Re: quick autotap question? Yes - when not under power enrichment or decel enleanmnet (i.e. what most people understand to be closed loop), the front O2 sensor(s) voltage will oscillate across the O2 threshold voltage about 1-3 times per second.
Usually bouncing somewhere between 0.2 volts and 0.8 volts.
Regards
Paul
Usually bouncing somewhere between 0.2 volts and 0.8 volts.
Regards
Paul
