91 318is--M50 swap

[Stu]

My car is a '91 318is, it has an M50 swap, '95 M3 automatic wiring harness, 413 ECU.

I drove the car to UPS this morning, no issues whatsoever.
The car sat in the carport for a few hours, then I went to drive to the post office. First start...cranked, fired...hovered around 400rpm--quit. Next few tries it would crank over but no fire. Fuel pressure is zero during cranking, according to adjustable FPR.

I swapped the fuel pump relay with another relay, still no fuel pressure.
I checked all fuses related to fuel delivery, all are fine.

This is my only car and need it daily for work, errands, etc.

Any input is appreciated.

[MR 325]

Fuel pump maybe?

[aaron_silva]

Fuel pump maybe?

While cranking the engine, try tapping on the top of the fuel pump on the electrical connector (simotaneously). When my pump was going bad, that is how I started my car.

Good luck. Let me know if it works for you.

Aaron

[e30Matt]

Fuel pump or maybe clogged fuel filter?

[kowalski]

also could be a leak or kink in one of the lines if you took the tank out for some strange reason... but a leak will do it too... maybe the regulator is defective...? i duno if that every happens tho

[Brew]

I'd check the fuel pump first, give it a few taps.

[AdamF 88iS]

Fuel pump.

[Pedro]

my car did the same shit, then would start whenever it felt like it. it was the fuel pump.

[Stu]

Was able to just now get a fuel pump from SSF, had it shipped Next Day. Installation was easy with just a few tools, and the car runs really strong right now.

Thanks to all for the advice.