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Fuel Pressure - Click HERE for Original Thread

stealth
Ok In order for my car to run I need to pinch the return fuel line. And when its revved it will die out.

When i got my car diagnosed I was told that I need a new fuel pump.

I did some research on the mr2oc site. And they say that i need a new FPR.

Does anyone have an idea if its the pump or the FPR. The pump is supposed to be good for stock boost ATM.

Sam

TrevorK
How did the shop diagnose your fuel pump dying?

Did they put a fuel pressure gauge inline (Before the fuel goes through the fuel rail) and measure the pressure? Or did they just tell you that's what it is?

That would be the easy way - measure your fuel pressure, if it's at factory (Or in you case, desired specs) specs, then you are good to go, and know it's the FPR....

stealth
quote:
Originally posted by TrevorK
How did the shop diagnose your fuel pump dying?

Did they put a fuel pressure gauge inline (Before the fuel goes through the fuel rail) and measure the pressure? Or did they just tell you that's what it is?

That would be the easy way - measure your fuel pressure, if it's at factory (Or in you case, desired specs) specs, then you are good to go, and know it's the FPR....



They just said thats what they thought. Because they were diagnoisng a spark issue.

So just get fuel gauge before the rail and put it in and if its fine, then the pump is fine?

TrevorK
quote:
Originally posted by stealth
They just said thats what they thought. Because they were diagnoisng a spark issue.

So just get fuel gauge before the rail and put it in and if its fine, then the pump is fine?



Typically if the fuel pump is experiencing problems, the fuel pressure will not read what it's supposed to (It may only have a problem at WOT, or whatever).

So all you need to do is get a fuel pressure gauge, and hook it up somewhere before the fuel rail.

Go through the same tests you have - and see if the pressure drops when you say rev it up (I think that's where it dies on you?).

I think a Haynes manual might also have a test for a FPR, but I'm not sure and don't have one handy...

95IntegraRS
A faulty pump will die out in the high RPMs because it cannot support the fuel pressure needed.




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