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Mechanical Fuel Pump Question
Hello Gentlemen, I have a 351W based block and I'm using the Carter mechanical pump. The in line fuel pressure gauge is now reading about 2.5 - 3 pounds. My older gauge was not liquid filled (it also started to have low readings) Several months ago I changed over to a liquid filled gauge and it was reading 4-5 pumps but not recently. I have a new fuel filter on the car.
The question: If the mechanical pump is the culprit, do they fail completely or do they slowly fail and die giving one fuel pressure from 5-6.5lbs (new) and then progressively lower readings untl death..... Thanks, Mike Sharkey |
Mike,
If you have any dirt in the system it can hold the valves in the pump open and cause a low reading. Are you sure that you do not have a kink in the feed side of the line or other blockage? |
Mike,
From my "for what it's worth" department:rolleyes: Had two liquid filled gauges in my car. Both failed to read accurately after a month or so of use. When new, they would read 6 to 7 pounds, but when they failed they would indicate anything from zero to something short of 7 pounds. Upgraded to an AutoMeter #2172 and have not had another problem in over two years. Standard disclaimer..... your mileage may vary :LOL: - Jim - |
Fuel Pressure
Thanks guys, I HAD two fuel filters, one just off the gas tank and fitted with a 3 dollar special unit. I recently (a month ago) fitted a Alum. JAZ unit just afer the fuel pump. Well.. I removed the JAZ unit and my pressure now reads 7.5 to 8 lbs. (engine cold). I've gotton some feedback that the liquid gauges will sometimes read normal with a cold engine and engine compartment but will take a nosedive after the engine gets hot. It's rained some much here I haven't checked the gauge when hot yet. We'll see.
Thanks, Mike |
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