First drive L92 with VVT and 4L70E LOG

[68problemchild]

Current status:

L76 modified truck tune working with

TCM (OS 24239927) - VIN 1GTEK19Y38Z000000

It sure drives like a truck.

It will go through the gears, all 4, but hangs in 4th. It will down shift back to first at stop and go through the gears on start. I am in 4th at 20mph.

It will let me shift manually to select gears with the horse shoe shifter and stalls a ton.

Current error codes:

TCM P0787 shift / timing solenoid low
ECM P0011 intake camshaft position (CMP) system performance bank 1.
ECM P0700 TCM requested mil illumination

[Taz]

Sorry ... you and I were posting at the same time ... you got the L76 tune to work ?? If so, post current ECM and TCM tune ... speed issue might be as simple as a problem with the calculated VSS speed, and resultant shift speeds.

Please "read" tunes as they are currently in the ECM / TCM - so we're working with the same tune.


Regards,
Taz

[68problemchild]

This is still not a full reflash on the L76 engine tune. (no fat red bar)

I think if I fuss with the vats, I may get it to take the newer 2008
Sierra engine tune.

Tranny is the stock L76 Sierra 2008 full reflash.

[Taz]

OK ... you're using the 2007 L76 tune with the 2008 TCM tune ? That mix may be causing communication issues .. but you're moving in the right direction. Log looks like speed maxed out around 55 MPH, with most of the time in the 25 to 35 MPH range.


Regards,
Taz

[Taz]

OK ... given your progress, it looks like some of the problems were stemming from the original TCM tune. If I recall some of Ian's comments - the 2008 tune may have issues with the TB or other calibrations - and would use it as a last resort.

Would suggest moving to the 2007 Holden tunes Sid suggested - potentially less compatibility issues - and I had started working on them in anticipation of problems - nearly have the changes complete for your 68 Camaro.


Regards,
Taz

[68problemchild]

Thanks Taz! Should I be looking for a 2007 L76 TCM tune?

[Taz]

Yes, if you can find one ... none on the Holdencrazy site ... just the 2008 matching pair.

The L98 tunes from Sid should work OK - in lieu of finding a 2007 T42 TCM tune from a compatible 2007 L76 OS.

Weekend with the family ... probably the same at your house ... will try and get the L98 ECM & TCM modified tunes posted early tomorrow.


Regards,
Taz

[Taz]

Attached are the 2007 L98 Holden tune files Sid had suggested.

These have been modified to your application, including:


2010 L99 Camaro

• injector flow rate
• intake manifold volume
• MAP values

2007 L92 Escalade

• VVE table values
• spark table values
• cylinder volume

2007 Corvette

• MAF values
• IAT values

Tunes were also adjusted for your tire size and gear ratio. VATS / Cranking “patches” applied. DTC / MIL values modified (probably didn’t get them all !).

Hopefully I didn’t miss anything … give the tunes a thorough review prior to use. Remember to apply the alternator fix.

Good luck with the “full flash” of each …….


Regards,
Taz

[68problemchild]

That is awesome. I really appreciate all the effort.

Will give them a go today.

[68problemchild]

Hmm. Sorry, did full flash then partial on both tunes. No start. DTC's

ECM P2119
ECM P0851