Data Log Attached, StFt +20 but also -40?
Thread Starter
TECH Apprentice
Joined: May 2010
Posts: 303
Likes: 0
Data Log Attached, StFt +20 but also -40? Hello everyone. I have been traying to diagnose my oil smelling like fuel/rich. Trying diff things, something is off, maybe you guys can give me a direction to go.
98 Trans Am, full exhaust, lid and dyno tuned. The data has both StFt, both o2 voltages and my MaF grams/sec.
I just cleaned my MAF and had the batt disconnected and this was my first start up. I let the car idle and then raised the rpms from idle a few times. My Car is +9 stft at idle, then Revved it around the 900second mark and the car went to +20 and then idled back to +9stft. I revved it again around 1050second mark and the car corrected itself to -40stft.
Any guesses to what is different to cause the car to go lean on the first rev and then the car to be rich on the second Rev? BTW my LtFt are turned off and stay at 0.
98 Trans Am, full exhaust, lid and dyno tuned. The data has both StFt, both o2 voltages and my MaF grams/sec.
I just cleaned my MAF and had the batt disconnected and this was my first start up. I let the car idle and then raised the rpms from idle a few times. My Car is +9 stft at idle, then Revved it around the 900second mark and the car went to +20 and then idled back to +9stft. I revved it again around 1050second mark and the car corrected itself to -40stft.
Any guesses to what is different to cause the car to go lean on the first rev and then the car to be rich on the second Rev? BTW my LtFt are turned off and stay at 0.
Last edited by WS6wanted; Aug 18, 2024 at 02:33 AM.
