Use an 18 inch length of fuel hose and a funnel to test your fuel filter: New -- 29 fl oz in 30 sec. Used -- 9 fl oz in 30 sec. The back pressure for a new filter is estimated at .25 psi at WOT at BMEP max. It can be measured in the lab with a manometer. The back pressure of the used one is unknown. Suggest the following design changes: Spin on fuel filter. Change in 30 sec. Avoid clamp on hose. May leak. Also, the old hoses are difficult to remove and replace to a new filter. Hoses to spin on fixture Airquip type. Differential damped pressure switch across the input-output mounted to spin on fixture. Set to trigger signal to computer at 10x (2.5 psi) backpressure for 5 sec. or more. Fault code: Check filter. This will eliminate fuel pump failures due to xs backpressure. Expect to see it on the Pacifica!
max. It can be measured in the lab with a manometer. The back pressure of the used one is unknown. Oh great, take a $3 part and make it cost $30. Why not simply double the surface area of the filter? The cars that I've had clogged fuel filters in generally had these itty bitty ones. Make the fuel filter the size of an oil filter and by the time it clogs, the car will be in the junkyard. Ted
