318 stalling

[Willisbe]

Car 85 318i
Stock ignition, stock...
After pulling the motor and gas tank and reinstalling
both, the car will fire after cranking for a few seconds and stall 1-2 seconds later.
I am getting 43 psi from the pump when I jump the relay . 40 psi when I try to start the car.
I swapped the computer, Bosch control unit, idle control unit, idle air stabilizer, coil, complete air box/ elbows and sensors with known good ones from the daily driver.
The car will continue to run if the starter is engaged after the car initially starts.
I tried a different ignition switch and the problem is still present.
What tells the "car" that the engine is running
The first time it fired up after motor reinstall, subsequent times have been problems.
Before swap, the engine almost started immediately.
Any ideas/experience?


Possible mix up of fuel lines?
Jeremy Cesene
318i ITB