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jdm213
07-22-2011, 08:48 PM
I have a s13 black top sr and i just put a walbro fuel pump today but i feel like my car is not getting enough fue.l if i squeeze the fuel lines were the filter is they are weak and soft i have no leaks of any ... could it be a bad fuel pressure regulator.
OkiDori17
07-22-2011, 10:13 PM
did you change your fuel filter?
and yes, you should get a new fpr when you upgrade the fuel pump
jdm213
07-22-2011, 11:05 PM
no i havent replaced the filter tomorrow ima oull the fuel lines out and blow pressured air stait to them and see whats up and im definatley gonna check if its the filter and replace it with a z32 one im hoping its the filter...
jdm213
07-23-2011, 03:50 PM
cmon i need some insight on this
jr_ss
07-23-2011, 05:08 PM
Did you check anything that you said you were going to?
cotbu
07-23-2011, 05:21 PM
First, how the fpr works. It's closed at zero vacuum or no vac. It would have to be stuck open for you to have low fuel pressure if the fpr is the problem, so it's not likely! you could be idling high and pulling a strong vacuum which you aren't tuned for and yes that could cause problems.

Remove the vacuum from the fpr and plug the line. Any difference?
You could also have a leak, the one's you cant see are the injector o rings, check them.
My stock fpr would hold base pressure for 30+mins after engine off, my aeromotive fpr relieves 20psi the holds 20-25psi for about 30mins.

If your lines are good and the fuel pump is wired correctly i would say get a fuel pressure gauge and go from there. We're taking your word that the problem is fuel related but it could be something else. G/L
OkiDori17
07-23-2011, 07:50 PM
did you change your filter yet?
did you upgrade your fpr yet?
jdm213
07-24-2011, 01:17 PM
did you change your filter yet?
did you upgrade your fpr yet?


well i havent changed non of those im going to purchase the filter andd see wat happens then ill move to the fpr andd wat else
jr_ss
07-24-2011, 01:45 PM
So then, how are you going to come in here bitching about needing help when you haven't tried a damn thing yet? Check/test what has been suggested and then move on to the next suggestion. The fuel system isn't complicated and there's not much to check besides the pump, the filter, and the connections.
OkiDori17
07-24-2011, 02:01 PM
^^HAHA

very very true though
jdm213
07-25-2011, 09:51 AM
So then, how are you going to come in here bitching about needing help when you haven't tried a damn thing yet? Check/test what has been suggested and then move on to the next suggestion. The fuel system isn't complicated and there's not much to check besides the pump, the filter, and the connections.

wtf i did check it how am i bitchin its just weird that its not pressurizing, i found sand like particles in my fuel lines and in my filter so i bought new lines and filter and presto... sorry i forgot to post back and let yall know :smash:
OkiDori17
07-25-2011, 10:38 AM
so its working now?
jdm213
07-25-2011, 02:01 PM
so its working now?

well u were correct that its not a hard thing to diagnose but all my lines were filled with sand and the filter was also which trips me out as to why there was sand its good now but i wanna check my tank to make sure its all good
OkiDori17
07-25-2011, 10:24 PM
probably a good idea haha