
s50b30 fuel problem
Moderator: martauto
- beamer_325i
- E30 Zone Newbie
- Posts: 101
- Joined: Sun Mar 15, 2009 11:00 pm
- Location: Shetland
hi there having a problem with my engine. it will only offer to start if a leave the fuel pump running for about 30 seconds then it will nearly start. it like its not getting enough pressure? is there anything like a fuel pressure regulater on them that could be blocked etc. i took of the fuel feed pipe and put the pump going into a bucket ther is pleanty of fuel coming through but not sure about pressure. 

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- E30 Zone Newbie
- Posts: 96
- Joined: Sat May 22, 2010 11:00 pm
- Location: Norway
What pump do you have?
S50 runs a 5 bar base pressure.
S50 runs a 5 bar base pressure.
87 E30M3 RB26DETT
- martinpallot
- E30 Zone Regular
- Posts: 352
- Joined: Sat Aug 04, 2007 11:00 pm
- Location: Jersey C.I
Not the B30 though, prsssure regulator is in the bulkhead end of the fuel rail, you will need the plenum off to get to it effectivelyLarsen-Racing wrote:What pump do you have?
S50 runs a 5 bar base pressure.
^^ Yup, the S50B30 runs at 3 bar - it will quite happily run on the standard E30 pump. The B32 needs 5 bar.
From memory the pressure reg isnt very easy to get at, it was a right pain to get the pipes back on as well - if you are going to replace it, do all the fuel lines etc while you are there, they can get brittle.
From memory the pressure reg isnt very easy to get at, it was a right pain to get the pipes back on as well - if you are going to replace it, do all the fuel lines etc while you are there, they can get brittle.
James
'91 325i Sport
'93 318i touring 16v
'91 325i Sport
'93 318i touring 16v
- beamer_325i
- E30 Zone Newbie
- Posts: 101
- Joined: Sun Mar 15, 2009 11:00 pm
- Location: Shetland
thanks for the replies. the car seems to run good when its running just gotta leave the pump going for a good while before it will start up. i was driving it up a steep ramp the other day and it nearly stoped on me. started reving up on its own like it would do if running out of fuel. seems like the pump was not keen to pump fuel going up hill:( any ideas ???? pump not pumping right??