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Old 06-19-2012, 06:53 PM   #35
Scooby Specialist
Member#: 73932
Join Date: Nov 2004
Chapter/Region: RMIC
Location: Denver
2005 STi BROtuned
2004 S2000


Originally Posted by eliezerrosario View Post
No, the stock fuel pump has the check valve on it....and I believe walbro's also have this "built in" check valve. If you don't have one, it could be the cause for the pressure drops.

Here is a link of what I'm talking about:

Look at pages 11 and 12

There's only 10 pages when I load it.

The check valve is in the pump itself and you're likely not getting it out and shouldnd be a restriction.
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yamahaSHO is offline   Reply With Quote