Need Help with '8747 ECM

[winger1921]

I have a 1990 Chevy G30 with a 454. (I know most people have never seen one, I swear it is real) Mine came with the '8747. I am working with a guy via email to get the tuning right (I swapped out the cam on the rebuild). The problem is datalogging. I can't get winaldl or tuner pro to read this thing. It will catch some data but not very much. And if I am at 1800 rpm or more, the programs are not catching anything. I am desperate at this point. Is there anything that can actually read these? Or do I need to swap to a different ECM and which one?

[dave w]

https://www.gearhead-efi.com/Fuel-In...Information-4F shows 2 different .adx files. Which .adx file are you trying to use?

What driver are you using for the ALDL cable?

What com port is ALDL cable configured to?

[winger1921]

I have tried both. The aldl is on Com 3. I am receiving data but it is not a very good stream. Receives useable data maybe every 10-40 seconds, zero at higher rpm. I am using a cable I got from datacat aldl to usb.

[dave w]

The 10K resistor is not required with $4F.

The attached $4F data log was recorded with a cable from aldlcable.com: https://obd2allinone.com/products/aldlobd1u.asp
using the driver from http://tunercat.com/ (the ALDL was plugged into the USB port when the driver was installed)

Driver.JPG


Possibly playback the attached $4F data log to verify the TunerPro RT configuration.

[dave w]

I have tried both. The aldl is on Com 3. I am receiving data but it is not a very good stream. Receives useable data maybe every 10-40 seconds, zero at higher rpm. I am using a cable I got from datacat aldl to usb.

Perhaps these screen captures will help?

TP 4F.jpg

Preferences 01.JPG

[winger1921]

Thank you. After uninstalling and reinstalling twice, it seems to be working now. I appreciate the help!