Might be fuel pump problem not sure?

Tiny
CORNFLAKES911
  • MEMBER
  • FORD F-150
I have a 1997 ford f150 xlt s/cab 4wd 5.4l v8 with 159,500 miles. About 2 weeks ago I was on the road and my engine just stoped, I pulled over and started it back up with no problem. I replaced the fuel filter to see if that was the case and today it did it again and now I can't even start the truck. I'm not sure if it is the fuel filter or not but please someone help.
Friday, October 26th, 2007 AT 7:29 PM

5 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,386 POSTS
Is there a check engine light on or any trouble codes?

Check for spark at #1 spark plug, if nothing then post back and well go through the steps to find out what is wrong.

If you have bright blue sparks at #1spark plug then check for fuel at the fuel rail, If nothing once again post back and well go through the steps to find out what is wrong with it.
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Saturday, October 27th, 2007 AT 9:25 AM
Tiny
CORNFLAKES911
  • MEMBER
  • 13 POSTS
Ok I changed the fuel pump today and the truck still won't start. Now I checked the fuses and there is a blown "pcm power" or pmc im not sure if that has something to do with it.

My check engine light never came on. Might be a bad bulb. I haven't did the diagnostic test yet for codes but I will give more info tomorrow.
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Sunday, October 28th, 2007 AT 9:42 PM
Tiny
UKJONES
  • MEMBER
  • 2 POSTS
Did it happen when you hit a bump in the road because I am having the same problem with a 2004 5.4L F-150.
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Monday, October 29th, 2007 AT 4:57 PM
Tiny
CORNFLAKES911
  • MEMBER
  • 13 POSTS
No, but this is what I fixed today. What I did was under the dash on the passengers side, there is a little blue box with two plugs t(his is your computer). I unplugged it and put in a new fuse. It cranked and it worked fine. I know it is going to shut down again because there is probably a short circuit somewhere. So any more ideas that would be great.
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Monday, October 29th, 2007 AT 5:04 PM
Tiny
CORNFLAKES911
  • MEMBER
  • 13 POSTS
No, but this is what I fixed today. What I did was under the dash on the passengers side, there is a little blue box with two plugs t(his is your computer). I unplugged it and put in a new fuse. It cranked and it worked fine. I know it is going to shut down again because there is probably a short circuit somewhere. So any more ideas that would be great.[/Quote:0d4d059a7b]

I TAKE THAT BACK

i just cranked it up for about 20 min. And I test drove it and I guess when the motor heated up the engine shut back off and the pcm fuse was blown so it is probably a bad computer im not sure need help bad!

That little blue box is the air bag module. I made a mistake.
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Monday, October 29th, 2007 AT 10:08 PM

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