Question about 1985 Ford F150

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1985 Ford F-150

I just replaced my electric fuel pump and the single function fuel / filter reservoir located on left rail under the truck. The fuel rservoir had fuel in the line, but the truck still want crank. The truck is a 1985 Ford F-150 with a 302, 5.0L EFI.
If I mistakenly reversed the electrical leads (Red & Black) to the fuel pump would the pump operate ?
I traced the fuel line from the Electric Fuel pump to the high rise intake to see if there was another fuel filter, I can not see behind the intake. The intake is so high you cant see where the fuel line connections.
Need help !!!, I been working with this truck for 2 weeks now and have no luck so far.

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  • haywardervin Feb 22, 2009

    The engine will turn over but it will not start.

    Where is the Relay for the Electric Fuel Pump located on a 1985 Ford F-150, 302, 5.0L ?

    Like I stated, I replaced the electric fuel pump and just received a new single function reservoir from the Ford Auto Part Store. I replaced this also.This Reservoir is located between the Fuel Tank and The Electric Fuel Pump, It has a fuel filter inside the reservoir. I thought it was plugged up, but that was not the problem.The Truck will try to crank when I spray Carbureator Cleaner into the Fuel Ejectors, once this burns off it quits.

  • haywardervin Feb 22, 2009

    I know this may sound silly, but I'm not a mechanic. If the Electric Fuel Pump is humming and clicking would this still be a relay problem ?

    The New Electric Fuel Pump is doing the same as the old one I took off, its humming and clicking when I turned the switch on. I can actually hear the pump when I turn the switch on. It just want pump any gas to the fuel injector, I dont have a carbureator. The filter reservoir (bowl) have gas in it, It's new also.

    I wil take a look at the relay, i just hope i can find it.

    It really have me puzzled.

    I hate to take off the fuel tank and find the (Inside Tank) Fuel Tank Low Pressure Pump & Filter is working OK. Since this seems to be big job.

  • haywardervin Feb 23, 2009

    I have a Haynes Manual, but believe me, It really dont tell you what wrong. If I could get it to crank it's going to the shop. Thanks for your help.

  • Anonymous Apr 13, 2009

    Just replaced the electric fuel pump in my 1985 Ford F150 but I cant find the relay swith now can u plz help...

  • john milligan May 11, 2010

    first, if the leads were switched (should not even BE possible!)
    it would have shorted out immediately when you tried to start the truck! ( you MAY want to check the fuse and/ or relay for the pump, just in case!)

    you said that it won't crank? do you mean that it won't start? if it will not crank over at all, then you may have a new issue.


  • Anonymous Mar 13, 2014

    i need a electrical connector to fuel pump for 1994 1500 truck

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  • 373 Answers

If engine won't crack - dead battery
if engine cranks but won't start - no fuel or spark
fuel reservoir is the fuel tank.
a fuel filter can be inside a housing...

Posted on Feb 22, 2009

  • Rick Jones
    Rick Jones Feb 22, 2009

    my 86 ranger had a filter housing semular to what you have on yours. i had to remove the bowl to change the filter element. i do prefer the inline filters but that's the way ford designed the system.

    the fuel pump relay can be inside the engine compartment either on the firewall or on one of the inside fender wells.

    my ranger's relay was between the air filter housing and the fender. hard to find, but there were two relays not just one.

  • Rick Jones
    Rick Jones Feb 23, 2009

    buy yourself a Haynes tech. manual #H1636058 read thru some of this book to see if it will help. if you still feel that any of this is above your ability, it's time to take your truck to a garage and have them troubleshoot it for you.

    i took my truck to the shop the other day to see why the check engine light was on. and it ran rough. since i dont have a scanner to read the trouble code. i replaced the fuel filter before hand. it helped a little but not good enough and i still had the engine light on. they checked it for me, the code said #5 coil was bad and i should change the sparkplugs. of course for $300. so i took the truck home. stopped at o'reilly's got a coil for $45. installed it myself and if runs great and the engine light went out.

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