Return fuel filter?
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Mountain Pass
Joined: Nov 2020
Posts: 220
Likes: 34
From: Orcas Island
Return fuel filter?
Has anyone installed a fuel filter on the return line to prevent metal from a bad cp4 pump from contaminating the entire system? Pros/Cons, reasons why it can't be done or is not effective?
Laughing Gas
Joined: Jan 2024
Posts: 837
Likes: 456
From: Up in Texas
Hotshot
Joined: Jul 2013
Posts: 14,213
Likes: 2,170
before you can put in a return filter , you have to split the existing serial path the fuel is taking. The fuel goes thru the cp4 and directly into the injectors . Fuel returns from the fuel rail based on what the injectors do not use. So in this detail approach..a return filter is too late since the injectors got clobbered.
the s&S DPK will split the fuel path before it goes to the cp4. This allows fuel to go thru the cp4, then to a return filter …instead of going to the injectors as in the case of oem setup.
the split path provides the injectors clean fuel that does not first passs thru the cp4 roller bearings and cams.
FTE Legend
Joined: Mar 2017
Posts: 31,762
Likes: 9,113
From: Western NY
Lots of people use this kit S&S DPK 2.1
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