fuel ? on 1990 Ford F-150

fuel pumps buzz way to long, and will not start, until pumps stop! done the filter, changed pumps, done the dual function reseroir, than done bypass on the reseroir! (problem, the year 1988.)

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4 answers 5 comments
did you find out why your F150 wasn't starting? Was it related to the buzzing fuel pumps?
I never had a answer about the pumps buzzing to long before star up
try checking fuel pressure regulator and fuel pressure at the pumps
got a 92 with same problem what did u do
Im taking it to a different shop Friday I will let you know
The ECU in the driver kick panel is the problem. If you take it out and open it up you'll see a blue capacitor has gone bad and may be hanging by only 1 leg. It is rated at 47 mfd and 16V. You can replace it with one from Radio Shack as we did yesterday. Now pump runs about 5 seconds and the truck starts right up. The computer will not give a SPOUT signal(spark out) until the pump turns off.
I have a 1993 thats doing the same thing Iv spent a lot of money trying to fix it still doing it If you find out please let me know [Iv took it to shops they say I just dont know]
try checking fuel pressure regulator and fuel pressure at the pumps
fuel pressure is 50 Iv changed the regulator Im showing a 213 code which means loss of spark Im ckecking that out now