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Yes, I understand this. So when going thru the replace and program procedure, with a used ecm, I get a popup from GM. States a new VCI is detected and offers 3 choices. Accept, overwrite, or cancel....

Yeah that's real funny guys. Very helpful too. There is no question on the diagnosis. So put that to rest please.

Have either of you used GM Techline SPS to program a used e38 recently? Have...

Nothing done to vehicle. It has a bad ECM. Trying to replace it with a used one. Bone stock. The original complaint is the EVAP vent solenoid ckt. It is stuck on all the time by a failed driver in...

1gnfk13058r115522

Hello all. Trying to use GM Techline SPS and MDI to flash a stock cal to a used e38 ECM with same service number (12612384). This is for a 2008 Tahoe 5.3 VIN 0.

So far have been unsuccessful. ...

Can the FSCM be written in a way that it will produce 65 psi at high fuel demand? If yes, what is best way? Using the ZL1 pump and BAP in a 2013 Camaro SS.

The FSCM tables I found are a little...

Is there a way to access a DTC list for the T42 TCM trans controller? It is being used with an E38 ECM.

The master DTC list only gives me access to P0700.

FWIW if you put a selectable transfer case in it for testing it won't matter. When done put your AWD back in. It is not as hard a it sounds.

Would it be OK to put a 2 year old good used Dyno up for sale here? If not then just delete the post. If OK then PM me for details. Or post here. Thanks.

Thanks for the link. I went back to the gear tire wizard and entered 4.11 for the gear ratio. Bingo! Perfect 1.00 gear ratio in 3rd now.

Have this SC 3.8 in a 99 Bonne with 4T65E.
Has 33/37 drive/driven sprockets with a 3.29 differential and a 30T reluctor. So, this should = 3.69 final.
I have been attempting to use the gear/tire...

What are the benefits to the custom 2 bar OS?

Looking for opinions and help here. Starting on a project with an E38 controller and will see up to 10 PSI boost.

Vehicle is currently tuned with airflow only.

Have heard differing opinions...

I figured out what I was doing wrong. Runs better now thanks.

Is there an easy way to keep it out of closed loop at an idle?

We double checked the cam installation and found they had used a Cloyes Hex-A-Just timing set. It wasn't installed correctly. We put in the GM stuff and that is all better now. Satisfied with that...

So this thing has something going on that causes it to run poor in closed loop at an idle. MAF correction does not seem to help. Driving down the road it's OK. While idling hot in closed loop it runs...

I plan to tomorrow. Idle MAP is about 47 kpa. I have noticed that when it is in open loop it runs better. As soon as it goes closed loop it runs terrible. It will go on and off like this about every...

Anybody have trouble with one of these? I did the master disable on the AFM, Cylinder Deactivation or DOD whichever you prefer to call it.
Customer has had another shop replace cam, lifters,...

Set up an A/T trans log. Drive it and see. Log commanded gear, TCC parameters, etc. If that all looks good you probably have an internal issue.

Hello. Yes I tested actual fuel supply pressure. Not the rail pressure. Thanks for pointing that out.
From what I remember about this car there was a significant delay that caused a very lean rise...

WOO HOO! Got it working finally. Thanks again so much!

I really appreciate all the help guys. I have tried the revised layout. It appears to only populate the .08 cyl air row.
Is the 3 bar SD causing issues?
I was able to make an AFR error graph for...

Ok I'm still having problems. I can get the graph to populate. But the DCA doesn't seem right. It actually goes to the lower scale at higher airflow? So I have attached the current file I am working...

Ok does this look right?