Hi. I'm trying to do a 7M-GE swap into my 1982 Mk2 Supra. Scratch that -- the motor's in, we're just trying to wire it up. Unfortunately, we did it the first time around with an 89 EWD, while the motor is an 87. We can't get it to spark, or deliver fuel (though that's probably because we didn't put in the 7M fuel injector resistor pack.)
The way we have it wired up, we have lights installed in the ECU to show us when it has power, and when it's telling the car to fire the injectors and igniter. Trying to start, you can watch it flash away telling the car to spark, and inject fuel. After a while of no spark, the injector lights cut out, too. (Presumably to prevent flooding?) Putting an oscilloscope on the igniter signal, we can watch it sending the signal to the igniter, but the igniter doesn't send anything back. We swapped the igniter for a good one, even, and it still didn't spark. (Wouldn't even arc to the block setting the wire on it.)
I was sort of thinking the ECU changed over the years. Lo and behold, it turn out I'm right. However, the 90 EWD on the interweb (cygnusx1) and the 86.5 EWD I scored from another club member to compare produce something like the file attached, where the yellow-shaded pinout is the 86.5, and the gray shaded pinout is the 90. Apart from missing some labels on pins (because the 86.5 EWD is an absolute nightmare for ECU pinouts) they seem pretty similar.
Does anyone have a pinout of the 87 ECU that contradicts what I've found, or do we have more sinister problems afoot?
The way we have it wired up, we have lights installed in the ECU to show us when it has power, and when it's telling the car to fire the injectors and igniter. Trying to start, you can watch it flash away telling the car to spark, and inject fuel. After a while of no spark, the injector lights cut out, too. (Presumably to prevent flooding?) Putting an oscilloscope on the igniter signal, we can watch it sending the signal to the igniter, but the igniter doesn't send anything back. We swapped the igniter for a good one, even, and it still didn't spark. (Wouldn't even arc to the block setting the wire on it.)
I was sort of thinking the ECU changed over the years. Lo and behold, it turn out I'm right. However, the 90 EWD on the interweb (cygnusx1) and the 86.5 EWD I scored from another club member to compare produce something like the file attached, where the yellow-shaded pinout is the 86.5, and the gray shaded pinout is the 90. Apart from missing some labels on pins (because the 86.5 EWD is an absolute nightmare for ECU pinouts) they seem pretty similar.
Does anyone have a pinout of the 87 ECU that contradicts what I've found, or do we have more sinister problems afoot?
