Question about 1990 Ford F150

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1990 Ford F-150 Fuel Pump

I have a 1990 Ford F 150 with a 351 5.8L V8 Windsor Motor. The problem I have is that at low revs and idling, the truck just dies. This isnt too much of a problem at lights, I can just restart it, but it does become a problem if you are making a U-turn and there is traffic coming at you.

I have replaced the Throttle position sensor (for a high-rev/ irreguar rev issue) which made it not die as often, but it does still die.

I had the idea of replacing the fuel filter and putting fuel injector cleaner in the tank to see if that cleared it up, and I would like feedback on this idea.

But back to the original issue, if the fuel filter and injector cleaner doesnt work, I think i would have to replace the fuel pump. Where is the fuel pump exactly? Is it in the tank or next to it? Do I have to drop the tank to fix it?

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  • ryanmoffitt Jun 27, 2009

    I know that this is a fuel problem, because it wont start at all if there is less than a quarter of a tank. Still, where is the pump exactly?


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Yes, fuel pump is inside the tank, replace filter first. then i would test the fuel pressure at the rail, 30 -45 psi at idle. also test pressure regulator. replace pump last (its expensive)

Posted on Jun 27, 2009

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The fuel pump is in the tank. You will have to drop the entire tank to get to it. It will cost about $120-$145. I just replaced mine today. Hint, try not to have a full tank of gas, pain in the rear end to pour it all out and back in...

Posted on Apr 06, 2010

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Yes I Am A Ford Guy My Self He Is Correct On What You Should Do But If You Resort To Replacing The Fuel Pump Go To A Auto Salvage Yard And Get One Second Hand And Put It In Just To See If That Is Your Problem If So Then You Should Replace Your Fuel Pump It Is Expensive That Is Why I Suggest Getting One Second Hand To See If That Is Your Problem Instead Of Wasting Your Money On A New One If That Is Not Your Problem Right?

Posted on Jun 27, 2009

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Good idea go for it

Posted on Jun 27, 2009

  • roddy chippeway Jun 27, 2009

    the pump is located in the fuel tank. you would have to drop the tank which is held by 2 straps.


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Posted on Jan 02, 2017

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SOURCE: ford 351 widsor firing order

The firing order is casted on the intake; 15426378 good luck

Posted on May 21, 2009

SOURCE: 5.8 v8 351 windsor fuel injected firing order and

Don't have a pic of dist
You should know where the rotor points at TDC on # 1 and match up the cap and wires no problem

Posted on May 08, 2010

michigan man
  • 3533 Answers

SOURCE: Download ford 351 windsor v8

give these websites a try and if all fails stop by your local library and get your hands on a Haynes auto repair manual wish you the best of luck Michigan Man.

Posted on Oct 03, 2010

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