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Old 03-01-2010, 04:55 PM   #1
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Default Truck Stalls-code p0191--fuel rail pressure sensor! ANSWER

So, my 2004 F150 kept stalling on me and i couldnt figure out whatr was wrong with it so i started with the following..after replacing my fuel filter, then my fuel pump...estimated costed of a little over $550, i finally took it to a mechanic and the problem was the fuel pump module. so if ever you run into this problem check this first, its located above the spare tire and its a black box with an aluminum plate on the bottom that is bolted onto the steel frame, and since im up north salt and what not works its way in between these to metal and it corroides the aluminum plate and reveals the electronice circuit board which communicates with the fuel pump, onces this gets wet it shorts out and makes your truck stall. so if anyone runs into this problem, check out your fuel pump module. Hopes this saves some of you some money, unlike myself.
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Old 06-21-2011, 12:11 AM   #2
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Originally Posted by jls6681 View Post
So, my 2004 F150 kept stalling on me and i couldnt figure out whatr was wrong with it so i started with the following..after replacing my fuel filter, then my fuel pump...estimated costed of a little over $550, i finally took it to a mechanic and the problem was the fuel pump module. so if ever you run into this problem check this first, its located above the spare tire and its a black box with an aluminum plate on the bottom that is bolted onto the steel frame, and since im up north salt and what not works its way in between these to metal and it corroides the aluminum plate and reveals the electronice circuit board which communicates with the fuel pump, onces this gets wet it shorts out and makes your truck stall. so if anyone runs into this problem, check out your fuel pump module. Hopes this saves some of you some money, unlike myself.
THANKS for the info. I took spare tire down & there it was. BROKE. Who would put that under the truck? Not a good ideal.
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Old 06-21-2011, 01:27 AM   #3
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Good information yes, and it's been talked about here before. Folks can search out their problem and save money.

Last year a bunch of these failed; it was assumed the salty roads up north contributed to the failure. Ford mounted them up against that rail by the spare tire, and many think water, mud, and salt from the roads gets between the module and rail, making it corrode and rust out (the metal backing. The fix was discussed and found to be a good solution: install a few washers between the module mounting holes and the rail to allow about a quarter inch or so of space. This way the module back will not trap water, mud, or whatever. Another possible fix is to use some silicone around the edge to keep the water, mud, and grim out.

Also, if your dealer is out of the F150 part, the Mercury part is exchangable; some of the parts guys don't know this.

This was all discussed here last year.
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Last edited by Bucko; 06-21-2011 at 01:33 AM.
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