E38 idle tuning

[kangsta]

yup it was, but its not "new" , just one that hasn't been used by GM calibrators in older calibrations. A explanation on said table/feature will follow in an update shortly as this table will affect cammed engines cold starts. Standard engines it has no effect so not to worry with those.....

any updates on this?

[PRAY]

Prabably in this thread somewhere but does the same process apply for E67's?

[ringram]

Mine is 3300 or so. Ive not got the latest in front of me.
Im sure there is a missing table, but b1650 is the best value in lieu of the real table.
Jessie put me on to it when we were chatting at Sema. But it works. No holes need drilling etc. Im sure it does affect many other things, but idle transitions are pretty good, vastly improved over not changing b1650.
I wouldn't hesitate to change it.

[94SS]

Better logging is definitely needed. I am really suprised idle isn't a priority.

[The Alchemist]

any updates on this?

{B1219} Low Volatility Fuel Detect.

Turn to "off"

[Highlander]

Anyone got a good trick to get the car to be smooth from park to drive? This 2011 (never happened to me before) wants to die when I put it into park and reverse.

[Taz]

If you have upgraded the camshaft, odds are the problem is airflow related. Post the tune when you have a chance ... myself and / or others will take a look. Also, a log of the event occurring - including at least the following PIDs:

• GM.AIRPERSEC
• SAE.SPARKADV
• GM.ETCTP
• SAE.RPM
• SAE.ECT
• SAE.IAT
• SAE.MAP
• E38.INVLVTMP_DMA

Plus whichever gear position PID is supported for your OS.


Regards,
Taz

[swingtan]

In some OS's, there are "shift into gear" corrections for this (B1827}, {B1828}, {B1858}. Not all have these though.

If you don't have these, then you are stuch with getting minimum idle air spot on, or slightly high {B1829} and then use Idle Integral Step Size {B1844} to trim with.

Simon.

[Highlander]

I think the main problem comes from somewhere else. Voltage is a tad too low.
Engine will not let me take a log (ECM not detected) after the car has started. As long as its shut off it does.

Problem with a ground.. but... I didn't remove any grounds!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Naf]

How about a tune file, and a log includin your fuel trim. I am curious if you are able to give an open loop log with a WB readout...