I went fishing one day & came back to my truck & it wouldn't crank so I took it home & put a new fuel pump on it & it still doesn't work checked the fuel relay & that isn't it neither Can someone help me
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Re: 91 Ford F-150
First up, a bad fuel pump has naught to with an engine cranking
check your fuses, next if automatic, put the car in neutral then try to start it
sometimes the safety switch sort of jams
if this is problem start in neutral then it should reset itself and start in park again
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Re: 91 Ford F-150
Check the ground wires and the battery terminals if they got shook up during the trip. The batteries out there sometimes die on you for some reason. If the lights or the horn is weaker then the usual it might be the battery. Check also the starter relay, the cables and the capacitors
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ford code p1316 is IDM problem ( injector driver module)
the IDM operates as 2 banks of injector drivers ( right and left and can cause one bank to shut down as if driving a 4 cyl
there are forum statements which say that there is a problem with wiring and clips inside of the rocker covers or broken wires
check that the harness and wires to the unit are tight
suspect that the module may be in an area that is near the transmission and the wires may have been disturbed
I went google and typed in--- ford fault code p1316 and there are videos and forum sites that will help you
code p 0562 refers to system voltage --low===causes ---wiring---poor connection--battery---alternator
also refers to ECM power relay control--circuit open wiring ---ECM relay
check that all harness connections were put back properly after the transmission job
code p 0231 refers to fuel pump relay---circuit low ===causes --wiring short to ground --fuel pump relay---ECM
yes seems like the fuel pump will be going soon.the next time this happens replace it,they must have turned the many times trying to start it that it finally excited the pump but soon it will happen again.
i actually have a 1985 302 efi... there are 2 pumps one one the rail right under drivers door and one in the tank.. there are also two filters... one just behind the pump one the rail.. its actually inside a canister that you open with a oil filter wrench then it has a paper element inside..then there is a inline filter that is actually part of the high pressure line the hose is about 3 feet long and runs from your front pump up to the fuel rail agaist the firewall...this one is really hard to find (Buy) good luck wish i hade a carb
Same problem with my 85 F-150 5.0 EFI---turned out that the fuel pump relay under the hood was teriffically corroded on the inside (I opened up the relay to look inside). When I checked the voltage at the fuel pump it would show 3.5-6 volts instead of 12 volts.
I was thinking fuel blockage or perhaps failure of the in-tank pumps. Sometimes the truck would start and run, othertimes it would neither start nor run. Typically, if running it would stay running until turned off (where the relay had to break).
Changing the green fuel pump relay fixed the problem--12 volts now at the pump and no reoccurance.