318ti.org forum - View Single Post - S52 Swap, need help with fuel pressure and 3/2 valve

dylanreid16 · 12-08-2011, 05:51 PM

Hey guys,

recently put an s52 in my ti. Did not even realize that i needed to put the FPR on from the donor m3 so i sold it.

Clamped return line and it ran amazing!!! then died after a bit. really dumb to clamp it for so long.

installed m50 rail with fpr on it and now it starts and runs without needing to be clamped but HORRIBLY.

will hold a 500rpm idle and if i feather the throttle i can get the revs up high but if i give it any consitant gas it will just die.

car throws codes for 02 sensors and this 3/2 valve.

I have no 3/2 valve because i used obd1 fuel rail and no fpr under the car.

SO i have a connector under the car that goes to nothing and its supposed to go to the 3/2 valve.

Does anyone have any experience with this????? Or this 3/2 valve.

12-08-2011, 05:51 PM	#1
dylanreid16 Member Join Date: Oct 2008 Location: Mass. Posts: 53 '96 BMW 319ti Base iTrader: (0) Photo Gallery	S52 Swap, need help with fuel pressure and 3/2 valve Hey guys, recently put an s52 in my ti. Did not even realize that i needed to put the FPR on from the donor m3 so i sold it. Clamped return line and it ran amazing!!! then died after a bit. really dumb to clamp it for so long. installed m50 rail with fpr on it and now it starts and runs without needing to be clamped but HORRIBLY. will hold a 500rpm idle and if i feather the throttle i can get the revs up high but if i give it any consitant gas it will just die. car throws codes for 02 sensors and this 3/2 valve. I have no 3/2 valve because i used obd1 fuel rail and no fpr under the car. SO i have a connector under the car that goes to nothing and its supposed to go to the 3/2 valve. Does anyone have any experience with this????? Or this 3/2 valve.