desperate for help with getting power to ecu
 

So my 87 t2 will ot start becaust out of the blue the ecu/safc do not get power whe I turn the ignition. everything else clicks on with the ignition and the car cranks okay. But I get no spark,or fuel because the ecu sees no power.all the fuses are fine, the main relay gets its signal when I turn the key but does not send it back out the black and white wire to the ecu as it should. So I tried puttig power to the black and white wire(at the main relay) and the SAFC lights up and the relay(?) in front of the AIR filter clicks when I do this, but it will out help the car to spark or add fuel when I crank it this way. yesterday without any help when I turned the key the safc lit up and all seemed okay for about 2 seconds then it went out again. All the connectors seem tight too.
Any ideas? Please help!

if you are getting power to the input of the relay. but not on the output. then I would probably replace it.

https://www.rx7club.com/forum/attach...postid=1398836

Does the Black/Green have 12c on it at the Main Relay? That's what I'd be looking for. Yeah, the MainRelay might be bad. It really depends on which Black/White wire you put power on. The black/white at Ba 05 or Ba 06??? But if you knew that you would not be writing this post/thead.

Is the ENGINE fuse in and good, both????? How about that 40 amp fuse in the engine bay???? That one supplies the 12v to the coils etc.


All of the above????????????????????????????????

I just re-read your post. It's the Black/Green that supplies power to the Black/Yellow wire WHEN the contacts in the MainRelay pull in .....IF the 40amp fuse is any good AND the contacts in the MAIN RELAY are good. I say the 40 amp fuse is kaput. There ain't no 12v at the Black/Green wire at the Main Relay.

EDIT: Naw. I changed my mind. It's the ENGINE fuse that is blown. Crew compartment fuse.