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Old 02-16-2007, 12:01 AM
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Diesel Dan Diesel Dan is offline
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Join Date: May 2006
Location: Austin, TX
Posts: 264
Originally Posted by WD8CDH View Post
I think you want the pressure gauge before the filter rather than after if your lift pump is before the filters. The pressure after the filter is mostly controlled by the IP pressure relief on the IP.

If your lift pump pulls from the filters, then you need a vacuum gauge between the filter and the lift pump rather than a pressure gauge.
I have an auxillary electric fuel pump that pulls from the WVO tank and pushes it through the WVO filter. The stock lift pump then pulls the WVO from the filter and pushes it to the IP.

My goal is to be able to determine when my WVO filter is clogging. Taking all this into consideration, where do you recommend putting the gauge, and would it be pressure or vacuum?

1987 Mercedes 300D ~200K (Greasecar & Biodiesel)
1993 Ford F-250 7.3 IDI diesel 165K (Biodiesel)
1996 Thomas/International Bus with DT466 engine
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