HopGarage

Thanks for your help. I just shipped the ECU, hoping I can get it back before my race next month.

Correct, the usb is plugged into the one on the board as you have pictured since Ive been running this ECU. I tested it on another PC with a fresh install of PC link and I am getting the same USB malfunction code.

Just tried it and it's still saying USB malfunction. I am going to borrow a friend's PC to rule that out too. This is the only PC I own. When doing this I also get codes 101 (long blink and one quick) and 107 (long blink and 7 quick), I am assuming that's because they are not connected?

I am running the G4X HC92X. The car has been sitting a couple months in the garage after a successful track day. I went to start it on Saturday and moved it to my shop, across the yard with no issues. The next day I go to start it and tries to start, turns over once then dies. Try it again and the radiator fan kicks on when I turn the key to the on position. I unplug the fan and try again. The car fires right up, I plug the fan back in while it's running, fan does not turn on and the car runs like normal. Turn the car off then back on and it starts again just fine. So I go for a drive and everything seemed normal, thinking it's possibly a sticking fan relay maybe pulling too much power on start up. I get to where I'm going with out issue. The car sits for a few hours then when I go to start it, the car is in limp mode and wont rev passed 2500 in gear. I stop, turn the car off then pull out my laptop to see what's going on. It won't connect to the PC Link. Saying "The USB device connected to this PC has malfunctioned and windows does not recognize it." So I let the car sit for a little bit, attempted to unplug the fan again and it would turn over once then die. Eventually just let it sit for a bit and it started up just fine again and I got the car home running like normal. Since being home it still wont connect. I have tried updating the PC, Tried installing the new PC link software and drivers, troubleshooting/repairing the USB port, but other usb devices connect just fine. Any ideas? I am getting full 12+ volts to D-2, A-25, and B-1. There are 2 solid blue lights on the ECU with the key on.

I believe so. Just looked at it and with the car off in the garage and pump flowing fuel temp is between 75 and 77 degrees

I have my genuine GM 13507128 flex fuel sensor set up and running on DI6, but ethanol content is only reading at 65-70% when the fuel tested right at 85%. I had the tank removed and drained as much as possible before adding e85, then put in about a half gallon and drained it through the fuel return using the pump, repeated this 3 times before filling up my tank with E85. Is my sensor not compatible, is it faulty or is there some way to calibrate it?