Phil99vette

iTrader: (11)

I am trying to SD tune and automatic and for some reason it doesn't want to idle. A/F is pretty close but for some reason when you come to an idle it wants to drop really really low in RPMs and slowly work its way to idle RPM. Is there something I am missing or is there a parameter that needs to be disabled when SDing a auto?
Phil

2001 Pewter WS6

iTrader: (43)

Is this when you are coming to a stop? Or when it is in Park?

Phil99vette

iTrader: (11)

Coming to a stop, idle drops to 300 or so.
Phil

RedHardSupra

iTrader: (1)

phil, aim me later, we'll talk

Phil99vette

iTrader: (11)

Sent PM

WS6FirebirdTA00

iTrader: (33)

only things i have found to cause that would be the idle timing transitions, idle airflow, effective area. after messing with those on my car and others it cleared up all the low idling issue, although you may have taken care of these already

WS6snake-eater

Raise the base running airflow in gear.

Phil99vette

iTrader: (11)

Things I have noticed:
Timing is fine
Idle airflow looks to be very close
Effective area 0'd or with stock values have no difference in performance. Its something with the automatic.
Phil

RedHardSupra

iTrader: (1)

sounds like RAF tables are off. at idle RAF is like MAF, the engine estimates load based on it, so if it's off, your trans will go 'funny in the head'

WS6FirebirdTA00

iTrader: (33)

dont the autos have a second raf table to set as well? i cant remember what the second line is for raf.