Swaped m50 to s50 now fuel problems..

[denisbmwm5]

Hey all,
I have a 85 325e and swaped a m50 in it a year ago. Never had any problems with the m50, just got a great deal on a complete s50 swap. I swaped the s50 in last week and having fuel problems since. When I crank it up, it back fires out of the intake manifold and exhaust. I pulled the intake manifold off and its wet with fuel.
I tried swaping injectors, crank sensor, cam sensor, tps, ecu and still same thing. It wont even idle unless I have hit the throttle and hold it at 2000 rpm and then its back firing from exhaust.

[Farbin Kaiber]

Compression/leakdown/fuel pressure readings?

[denisbmwm5]

S50 came out of a friends 95 m3 that got tboned. s50 ran great before pulling it out of the e36. 150psi cold all 6 cylinders . Haven't checked fuel pressure, but all I did was swap the m50 out for the s50. This was my daily before a week ago.

[Farbin Kaiber]

Your injectors and rail, or his?

[denisbmwm5]

I use my whole m50 intake manifold with injectors and rail, then tried swaping injectors for the s50 injectors which are the same and no difference.

[Farbin Kaiber]

Would suck if it was hit hard enough to jump timing or bend something internally from being hit while in gear. (Grasping now...)

[denisbmwm5]

I drove the e36 m3 to my house 30 mins away after it was wrecked, ran great. I'm getting frustrated with this swap, took me a full day to pull and swap the s50 in and I been Fing with it for a week to try to figure this out problem.

[Farbin Kaiber]

m50 or s50 DME?

[denisbmwm5]

s50 ecu- 506 grey label, tried my m50 413 red label same results.

[Graebmw95]

Swaped m50 to s50 now fuel problems..

Good luck!

[denisbmwm5]

Fixed, pin on the crank that aligns the harmonic balancer backed in when i was installing it. Runs great now.