Please help, LS1 is popping out the exhaust in closed loop.
06-13-2013, 02:47 PM
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Please help, LS1 is popping out the exhaust in closed loop. The first time I took my Trans am out for it's first drive that lasted longer than 5 minutes, it starts popping out the exhaust and running badly on the way home. I have came to the conclusion that it only happens in closed loop. The car runs fine in cold in open loop. I have looked at the pids on the scan tool and as soon as it goes into closed loop STFT goes rich about 5-6% It seems like I can smell gas as well when it happens. I have unplugged the maf and it runs the same.. any other thoughts on why this is happening? The o2 sensors also count very slowly. The car has long tube headers.
06-13-2013, 03:50 PM
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It basically just started out of the blue. It ran four back to back 12 second passes the week before so I don't think anything was wrong then. And I'm not really sure how to post a log? The scan tool I'm using is the Torque app on my phone and an elm27. lol I'm poor. I was thinking the long tube headers might be throwing off the o2 sensors?
