DrFishbone
SCCoA Member
Well, I'm back again - this time looking for some troubleshooting help. Car died on the way to work this morning and I'm trying to troubleshoot from the office.
I just so happened to be datalogging too - log attached.
At the end of the log, you can see the STFT/LAMBSE go wacky...if I have this straight, negative STFT pulls fuel, so why is the car pulling fuel when the AFR's are so lean (lots of O2 picked up - almost atmosphere). The log shows it's intermittent, but after I shut the log down, it stayed running for several minutes as I maneuvered the car to a safe parking spot (all the while running around 22 AFR). Turned the car off and restarted, problem was still there...would just barely idle, but AFR was around 22...after a few seconds of idling, it perked up and ran normal for about 20 seconds, then back to the 22AFR.
Any ideas? I have a couple, but I don't like them. Tach signal was never erratic.
Hoping to get some ideas to check while I'm on break and get it fixed without having to tow.
I just so happened to be datalogging too - log attached.
At the end of the log, you can see the STFT/LAMBSE go wacky...if I have this straight, negative STFT pulls fuel, so why is the car pulling fuel when the AFR's are so lean (lots of O2 picked up - almost atmosphere). The log shows it's intermittent, but after I shut the log down, it stayed running for several minutes as I maneuvered the car to a safe parking spot (all the while running around 22 AFR). Turned the car off and restarted, problem was still there...would just barely idle, but AFR was around 22...after a few seconds of idling, it perked up and ran normal for about 20 seconds, then back to the 22AFR.
Any ideas? I have a couple, but I don't like them. Tach signal was never erratic.
Hoping to get some ideas to check while I'm on break and get it fixed without having to tow.