*Please no tuner war, Shiv hate, etc. in this thread. Just looking to get this issues resolved*
I have recently been having issues with a delta between banks 1 and 2 for AFR and fuel trim. The richer bank has a higher fuel trim, so the DME is intentionally making it richer. Looking at old logs, this started after I replaced both O2 sensors. Talking to Shiv he thought it was either long term adaptations causing it or old injectors having a bad seal (this was eliminated after a compression test [one bank was replaced under warranty 20k miles ago.])
So today I went ahead and cleared lambda adaptations with Inpa. No luck. So I then reset ALL adaptations with Inpa. After the first restart I got a DSC error and 500-1500rpm repeatedly (learning TPS). I restarted it & it idled fine, but AFR was constant(not reading). I restarted again and the AFR's were the same for ~10 seconds then the delta developed again. With the Daten files loaded I couldn't read my injectors so I just updated my Daten. Now there are additional adaptations listed that I will reset those tomorrow and see if it makes a difference.
Hopefully someone will have some insight into what may be causing this... I could try replacing the O2's again or the injectors, but hopefully it can be fixed via INPA.
Also note, it runs fine like this. It just limits my fueling trim window because one is higher and I don't want the other to go negative. Also it annoys me knowing it's there.
OLD AFR:
![Click here to enlarge]()
![Click here to enlarge]()
![Click here to enlarge]()
NEW AFR:
![Click here to enlarge]()
![Click here to enlarge]()
![Click here to enlarge]()
Compression Test:
Cyl | PSI
1 | 166
2 | 179*
3 | 173
4 | 176*
5 | 169*
6 | 174
*newer injectors (~22k miles vs 63k)
I have recently been having issues with a delta between banks 1 and 2 for AFR and fuel trim. The richer bank has a higher fuel trim, so the DME is intentionally making it richer. Looking at old logs, this started after I replaced both O2 sensors. Talking to Shiv he thought it was either long term adaptations causing it or old injectors having a bad seal (this was eliminated after a compression test [one bank was replaced under warranty 20k miles ago.])
So today I went ahead and cleared lambda adaptations with Inpa. No luck. So I then reset ALL adaptations with Inpa. After the first restart I got a DSC error and 500-1500rpm repeatedly (learning TPS). I restarted it & it idled fine, but AFR was constant(not reading). I restarted again and the AFR's were the same for ~10 seconds then the delta developed again. With the Daten files loaded I couldn't read my injectors so I just updated my Daten. Now there are additional adaptations listed that I will reset those tomorrow and see if it makes a difference.
Hopefully someone will have some insight into what may be causing this... I could try replacing the O2's again or the injectors, but hopefully it can be fixed via INPA.
Also note, it runs fine like this. It just limits my fueling trim window because one is higher and I don't want the other to go negative. Also it annoys me knowing it's there.
OLD AFR:
NEW AFR:
Compression Test:
Cyl | PSI
1 | 166
2 | 179*
3 | 173
4 | 176*
5 | 169*
6 | 174
*newer injectors (~22k miles vs 63k)