Lean Spike Driving Me Crazy
11-27-2009, 11:21 AM
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Lean Spike Driving Me Crazy I got this weird lean issuse when ever I let off the gas then get back on it. Dosn't matter if I just let up a little or between gear changes. It spikes over 18+ AFR, car stumbles for a sec, then it resumes its course. Anyone mind taking a look and putting out some ideas?
2003 Z06
Forged 347
LS7 cam
60# Motrons
160 Thermostat
Twin Turbo
Meth
TR6 plugs @.030
I have been using the paste % half with the afr% error.
Not sure it this will help but here are my PID's:
AEM WB
([PID.2811]/0.480287467)+8.5
AFR % Error
([PID.2811]/.480287467)+8.5]-[SENS.121])/[SENS.121]
Heres an example
HPTuners
http://www.hptuners.com/forum/attach...7&d=1259336944 <--- SCAN
http://www.hptuners.com/forum/attach...8&d=1259336958 <---TUNE
http://www.hptuners.com/forum/attach...0&d=1259342116 <--- .CFG
2003 Z06
Forged 347
LS7 cam
60# Motrons
160 Thermostat
Twin Turbo
Meth
TR6 plugs @.030
I have been using the paste % half with the afr% error.
Not sure it this will help but here are my PID's:
AEM WB
([PID.2811]/0.480287467)+8.5
AFR % Error
([PID.2811]/.480287467)+8.5]-[SENS.121])/[SENS.121]
Heres an example
HPTuners
http://www.hptuners.com/forum/attach...7&d=1259336944 <--- SCAN
http://www.hptuners.com/forum/attach...8&d=1259336958 <---TUNE
http://www.hptuners.com/forum/attach...0&d=1259342116 <--- .CFG
Last edited by TXZ0603; 11-27-2009 at 08:04 PM.
11-27-2009, 07:55 PM
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That's my CL tune. I tuned it primarily in OL and reset the trims each time regardless. Im almost ( not sure yet ) thinking that possibly my injectors could be causing it, but I know my data is good for them and they are new.
Could DFCO cause this even though it is used for decel and mine is an acceleration problem?
Not sure it this will help but here are my PID's:
AEM WB
([PID.2811]/0.480287467)+8.5
AFR % Error
([PID.2811]/.480287467)+8.5]-[SENS.121])/[SENS.121]
Could DFCO cause this even though it is used for decel and mine is an acceleration problem?
Not sure it this will help but here are my PID's:
AEM WB
([PID.2811]/0.480287467)+8.5
AFR % Error
([PID.2811]/.480287467)+8.5]-[SENS.121])/[SENS.121]
Last edited by TXZ0603; 11-27-2009 at 08:03 PM.
11-27-2009, 11:56 PM
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Well I noticed that I did not match my Default injector pulse to my min injector pulse when I added the new injector information. I am going back to OLSD for tuning with the new PW added to see what it will do.
11-28-2009, 05:17 PM
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Did alot of driving and logging and tuning today. I got it down fairly well in OLSD so I went back to CLSD. The spike came back. It has something to do with closed loop. I turned DFCO back on in the final tune and it only seems to have made it worse. I am boggled to say the least.
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11-28-2009, 06:33 PM
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Based on a response in another thread regarding transient fueling, here are my spike at map vs temp and afr. How could i adjust map when the table in the tune does not go that low?
MAP (kpa)
Temp 181 183
5.7 18.62
7.1 16.42
8.4 18.42
8.4 18.67 17.93
8.9 17.9
9.3 18.83
13.3 18.58
15.1 17.89
16 18.26
16 16.13
16 17.77
16 18.62
17.8 18.67
MAP (kpa)
Temp 181 183
5.7 18.62
7.1 16.42
8.4 18.42
8.4 18.67 17.93
8.9 17.9
9.3 18.83
13.3 18.58
15.1 17.89
16 18.26
16 16.13
16 17.77
16 18.62
17.8 18.67
