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Originally Posted by brittbolen
update... it was the fuel pump. pressure would drop from 14 to 4 as things warmed up, and then it stalled. new pump, and a clean out of the sock/screen in the tank for good measure, and the car runs like a dream. 3rd pump in 10 years / 24,000 miles...
also as previously mentioned, i no longer have to smell gas after I fill up!
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I think you need to track down the reason why you are experiencing such a high failure rate on the fuel pump. These things typically go 100,000 miles with no issues whatsoever.
I might suggest a lack of use could be contributing. Condensation in the gas tank may be causing it to rust, which will clog the screen, but very small particles will pass through and possibly damage the pump. O-rings in the pump will dry out and leak, so it will not provide adequate pressure and volume. The little pucks on the pump impeller if allowed to dry out may rust or seize in place, causing a loss of pumping efficiency. Stuff like that.
You may want to take some measures to help "preserve" the fuel delivery system (and other systems as well) while the car sits undriven for extended periods. There are lots of products that are intended to do this. Maybe get the gas tank boiled out and coated internally with something that will seal it and prevent it rusting in the future. It sounds like you may just be getting a lot of crud in the system from sitting so much.
Quote:
Originally Posted by porschedude996
Are you running both air hoses to the pump?
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He was having problems with the electric fuel pump that delivers fuel to the MFI pump.