1985 635csi (US model) with the m30b34 of course, 059 ecu.
Real OEM shows several different fuel pressure regulators, all but one of which are 2.5 bar. The other is the 3.0 bar FPR. Which one is the correct one for my car? I did quite a bit of forum searching and looking on parts websites most places show the 2.5 bar as the correct one, but I believe the Bentley says 43psi, which is 3 bar.
There does appear to be a changeover date in 1987 from 2.5 bar to 3 bar, but I have not yet been able to confirm this.
A lot of conflicting info out there. All advice welcome.
Thanks in advance
Justin
Fuel Pressure Regulator - Which one?
Moderators: GRNSHRK, ron, bfons
Fuel Pressure Regulator - Which one?
'85 635csi - Dark Shark
'16 F150
'13 Subaru BRZ
'16 F150
'13 Subaru BRZ
Re: Fuel Pressure Regulator - Which one?
After additional reading and looking at a friend's '85 e23 with the m30b34, I have less clarity. I was almost sure that a 0280160225 (2.5 bar) was correct. But he has a 0280160249 (3.0 bar).
Can anyone confirm or deny that the 249 is the correct FPR for an '85 m30b34?
Can anyone confirm or deny that the 249 is the correct FPR for an '85 m30b34?
'85 635csi - Dark Shark
'16 F150
'13 Subaru BRZ
'16 F150
'13 Subaru BRZ
- hornhospital
- Platinum Member
- Posts: 2931
- Joined: Sun Jul 11, 2010 6:46 pm
- Location: Silverhill, AL
- Contact:
Re: Fuel Pressure Regulator - Which one?
My 85 635 has the 3.0 bar FPR. I don't know if it is original to the car, but it works.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
Re: Fuel Pressure Regulator - Which one?
Feedback appreciated, thank you.
'85 635csi - Dark Shark
'16 F150
'13 Subaru BRZ
'16 F150
'13 Subaru BRZ
Re: Fuel Pressure Regulator - Which one?
The underlying issue is that the shark started running real rough out of nowhere. I believe it is very lean. It idles rough and will barely move under a load. I have to constantly blip the throttle and ride the clutch just to get the car to go 5mph. I have parts to build an inline fuel pressure tester, just got sidetracked by a small Jeep project. I will test fuel pressure report back.
I have already checked all electrical and vacuum connections. I may also replace the fuel filter proactively, even if the pressure is good.
I have already checked all electrical and vacuum connections. I may also replace the fuel filter proactively, even if the pressure is good.
'85 635csi - Dark Shark
'16 F150
'13 Subaru BRZ
'16 F150
'13 Subaru BRZ
Re: Fuel Pressure Regulator - Which one?
it varies with which ECU and injectors are fitted.603racing wrote:After additional reading and looking at a friend's '85 e23 with the m30b34, I have less clarity. I was almost sure that a 0280160225 (2.5 bar) was correct. But he has a 0280160249 (3.0 bar).
Can anyone confirm or deny that the 249 is the correct FPR for an '85 m30b34?
cheers
~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Re: Fuel Pressure Regulator - Which one?
I finally got around to fixing this issue. With an 059 ecu and 19 lbs (yellow top) injectors, the 3.0 bar FPR is correct. I replaced it and the car runs well.
'85 635csi - Dark Shark
'16 F150
'13 Subaru BRZ
'16 F150
'13 Subaru BRZ