fuel pressure dropping
 

ok i went to the bank this morning and as soon as i left the bank my fuel pressured roped like a rock (while the car was running) and bogs really bad then shuts off.i lifted the hood restarted the car and wacthed the fuel pressure drop,it will do it a few time then go back to normal,i installed a walbro fuel pump,b&m fpr,and a fuel filter.i can tell when its about to happen cause the pump makes a funny noise.anyone have in ideal on what could be causing this?ive serached for awhile and came up with little info.

Re: fuel pressure dropping
 

B&M POS FPR sticking open and bypassing fuel back to the tank.

Get an AEM or Aeromotive.

Re: fuel pressure dropping
 

u think if i replaced it with a stock one it would stop doing that??this b&m one worked good for years why now?

Re: fuel pressure dropping
 

Why does anything fail? Just because it has worked for years doesn't mean it will last forever.

Why did you replace your stock one in the first place?

Re: fuel pressure dropping
 

very good point,

i havnt tried a stock one yet ill be doing that later,i had it on my car with a stock pump and it never did it.u think maybe the walbro pump may have tore that little rubber peice in there?

Re: fuel pressure dropping
 

more likely the spring is hangin up.

GET RID OF THE ------- POS!

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Re: fuel pressure dropping
 

ok i changed the fuel filter and put a stock fpr back on it runs fine but it only shows 30 psi at idle and almost 40 at wot?is that ok?

Re: fuel pressure dropping
 

what piece of ------- junk gauge you using?

1.5" I'll bet.

Re: fuel pressure dropping
 

well its a b&m one.i found the problem it has to be the sorry ass walbro fuel pump.i got a stock one im going to switch them out.