Missing ecu pins for cold start injection?

[pip17]

I havent posted for 2 years and now 2 posts in 2 days- im on a roll !

I have a 1990 celsior engine (which now lives in a mazda mx5/ miata), which does have the cold start injector and timer but doesnt seem to have the stj and stj1 pins on the ecu plug - i have gaps. I am using a 1990 ls400 wiring diagram - so am i looking at the right pin outs?

black wire goes to the sta pin and i was hoping for black/red to go to the stj pins.

Thanks ,Phil

 

[Zuffen]

The re/black wire usually feeds power to all the injectors and I can't see any reason the cold start injector wouldn't be fed from the same source.

Sorry I can't help on the earth return path.

 

[XR8tt]

To injector drivers in ECU ???

 

[sideshow]

theres no blackred for stj

black red is power for alot fo things

stj is for ecus with no cold start injector temp switch

and on usa based ecus im pretty sure there is an stj
but on jap ecus there is a cold start injector temp switch

 

[pip17]

theres no blackred for stj

black red is power for alot fo things

stj is for ecus with no cold start injector temp switch

and on usa based ecus im pretty sure there is an stj
but on jap ecus there is a cold start injector temp switch

Thanks for that - but how then should it be wired? black / red ( live) , throught the stat to the injector and black is ground?

Thanks, Phil