Originally Posted by ChristianKustomz
So here is an update on everything.
1.) Got the ECU back from my guys and found the ecu had problems and needed to be rebuilt. The capacitors were leaking and destroyed part of the board. They replaced them and repaired the board. They found other components on the board not functioning properly so the replaced those components as well. They tested the board again and found a short. They fixed that, reflashed it and...wah-lah! Perfect ecu.
Was reading this thread and thought wow . . . poor guy and poor car.
Just wanted to point this out . . . your ECU guy probably ripped you off. UNLESS you had an engineering sample ECU (which you don't from the photo), a rare pre-production ECU (with a seperate EPROM, which you don't from the photo) or a daughter board (which you don't from the photo) the that ECU CAN NOT BE RE-FLASHED. Anyone who tells you otherwise is lyeing.
The orignial CPU (M377 Famiily Single-Chip CMOS Micro-Computer) on that ECU had an integrated ROM which was One Time Programmable (OTP) at the factory. It was not possible to field program or re-program the ROM.
I make the VR4 Clone ECUs and have first hand knowledge of these very complex ECUs.
On another note, if you spent any more than $250 for the rebuild, you probably should have replaced it with a flashable VR4 Clone ECU. The extra cost could have been easily recovered by selling off all of the piggy backs and extras as the VR4 Clone ECU is flash tunable by laptop!