dhdenney

iTrader: (53)

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?

WS6FirebirdTA00

iTrader: (33)

was the 110 leaded?

dhdenney

iTrader: (53)

Yes, leaded 110.

SUTTERERMAN85

iTrader: (42)

the lead will f up your O2's

dhdenney

iTrader: (53)

But my question is will they improve and be ok or does it sound like they're shot?

WS6FirebirdTA00

iTrader: (33)

yep thats your problem, o2s are shot. get new ones and DO NOT run leaded racing gas

SUTTERERMAN85

iTrader: (42)

ok you need new ones. i'd run unleaded next time too. just kidding.

dhdenney

iTrader: (53)

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?

black01_WS6

iTrader: (13)

do not use leaded race gas, get some torco. you o2's are on their way out.

WS6FirebirdTA00

iTrader: (33)

if the entire ve table is properly tuned

horist

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)

dhdenney

iTrader: (53)

I did some SD tuning with VE Master this summer. The entire table has been scaled by VE master.

Bombguy99z28

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

dhdenney

iTrader: (53)

I'll try open loop for a while. I think it'll be fine. I just don't wanna spend the $100 to fix them.

NO CATZZ

iTrader: (10)

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.

WS6FirebirdTA00

iTrader: (33)

yeha i also have an o2 for sale

Bombguy99z28

Leaded gas will kill o2s no matter what, plugged, unplugged. Killed mine in about 15 minutes... I watched their death thralls with hptuners, it was hot.

dhdenney

iTrader: (53)

No it wasn't a while. It was like 10 miles. Just long enough to get to the exhaust shop. I guess it was hopeless either way.