just kidding. 
Odd O2 behavior after leaded 110 octane
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From: Monticello, Kentucky
Odd O2 behavior after leaded 110 octane I'll try to keep this short. Went to the track, put 5 gallons of race gas in, I broke ****, packed up and came home. Took it out the first time the other day and it drove fine but I was in open loop. I had unplugged the O2's to get it to the exhaust shop to have my exhaust modified due to clearence issues with the new BMR TA relocation. After plugging the O2's back up, driving home it started driving like ****. I let it cool down and started it up but did not drive it. It seemed ok but I imagine cuz it was in open loop. Poured in 5 gallons of 93 and fired it up tonight to drive with the PCM communicator and while in open loop, it drove ok--O2 voltages seemed normal. After getting in closed loop again, O2's looked good with my foot on the gas but 0 throttle brought them down low, in the 200's and 300's mv range. At one point, I tried some semi hard acceleration (half throttle) and it was like I hit a wall (no fuel) and O2's dropped to about 13 MV. I am semi-confident this is related to my race gas. Will my O2's improve or are they on their way out?
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From: Monticello, Kentucky
Well I seriously didn't think they would go that fast. That was the first time I ever used it. Theoretically, in PE O2 input is ignored right? If I ran open loop and was satisfied with drivability and my PE was tuned to 13:1 (which it is), I can get away with open loop then right?
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From: Lake Zurich, IL
your O2s are likely FUBARed .... doesn't take much lead to coat them and make them lazy/incorrect....
however , if you plan on running leaded gas often... as you surmised ... you can do an open loop tune to not use the O2s at all (only thing that sux is you won't have any reference as to where your AFR is ... lead will kill wideband O2s just as quickly)
however , if you plan on running leaded gas often... as you surmised ... you can do an open loop tune to not use the O2s at all (only thing that sux is you won't have any reference as to where your AFR is ... lead will kill wideband O2s just as quickly)
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From: Monticello, Kentucky
Originally Posted by WS6FirebirdTA00
if the entire ve table is properly tuned
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From: San Diego
I drove around a few times with my o2s shot. Won't really hurt anything, the car will just run really really messed up when it wants to be in closed loop. I stalled it about 50% of the time I had to let it idle at a stop light 
From your post it sounds like you drove around with the O2's unplugged for a while...is that true? If so and you did not completely remove them that will screw them up as well. They will not heat up enough to burn off contaminates and become completely useless...add that to the fact that you were running leaded race gas and you get a dead O2.
BTW I have 3 O2 sensors(used) laying around that I will sell you for cheap. PM me if interested.
BTW I have 3 O2 sensors(used) laying around that I will sell you for cheap. PM me if interested.
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From: Monticello, Kentucky
Originally Posted by NO CATZZ
From your post it sounds like you drove around with the O2's unplugged for a while...is that true? If so and you did not completely remove them that will screw them up as well. They will not heat up enough to burn off contaminates and become completely useless...add that to the fact that you were running leaded race gas and you get a dead O2.
BTW I have 3 O2 sensors(used) laying around that I will sell you for cheap. PM me if interested.
BTW I have 3 O2 sensors(used) laying around that I will sell you for cheap. PM me if interested.
