After fixing my t-belt, and re-doing my harness for swap into my 87 rx, It will start up perfect and run for about 5 seconds, then stall. If I touch the throttle it stalls. and It will not start at all if I give it any throttle. Theres no codes except when I unplugged some sensors and such to se iff running would change and it doesnt. No new codes if I reset ecu. Im pretty confident in the harness as I've done them before.
The thing I look at first is my IACV hose, it's hooked up good and the same as it's always been, I don't have a fuel pressure testor, but i'm assuming it has enough since it pushes through the regulator, I also pinched the return to spike the pressure to the max the fuel pump out puts.
I switched ecus, nothing, pulled a plug, looked at spark, it looks good even when it starts stalling.
I took an LED and hooked up to an injector plug to kinda moniter the pulse and it looks like good solid blinks until it starts stalling, it faints to very light blinks like it's leaning it.
If I crack the throttle the blinks goes almost non-existent
so it appears that it is stalling because the injectors are leaning fuel until it stalls??
I tried reading the plugs, but it's kinda difficult since it wont run long enough.
As much as I dislike this I used some starting fluid and It kept it running for a lot longer too.
I also played with the IACV with the top off and turned by hand and it stays running just as long when I adjust it by hand
Unplugging the MAF connector makes NO difference either