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Old 12-08-2011, 05:51 PM   #1
Join Date: Oct 2008
Location: Mass.
Posts: 53
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Default 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.
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Old 12-08-2011, 06:00 PM   #2
Join Date: Oct 2008
Location: Mass.
Posts: 53
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also running very rich. Plugs are black.

Either my ECU is trying to get used to the new normal fuel pressure, needs time or a GT1.

Or it has to do with no 3/2 valve and it not being plugged in
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