99 f150 4.6 auto 4x4
well my truck stopped starting no fuel pressure checked the shrader valve. replaced the fuel pump put the tank back up and nothing! fuel pump doesn ot make any noise at all when turning the key to the run position. I checked the relays and they are ok. i am at a loss here any one have any ideas? any help would be appreciated.

Len

 

check the enertia switch behind the passenger kick panel (triangle plastic piece)

its a little black and white canister looking thing that houses a spring and a button, the button should be pushed down about 1/3"

 

if not that, check the fuel pump fuse.

 

If not that, hit the schrader valve/ purge the air once, you may have over pressurized the rail.

BTW- Don't crank more than 4 consecutive seconds- or the PCM will shut down the injectors.

 

thecked the inertia switch and it seemed fine pressed the schrader falve and nothing came out. I also pulled the positive battery terminal for a few minutes to reset pcm just in case. still nothing.....

 

so what about the fuse? if you have a voltmeter then check for power going to the pump.

 

Do you hear the pump pressurize the lines KOEO ? If you can't hear it with the window down or door open, there is a power problem.

Never mind , I just read there is no noise. The 99 is wired different, but you still may be able to swap relays like I can. The 98's have a relay and a fuse under the hood, but like I said, I know the 99's were changed, just not sure what was changed. That little book in the glovebox will tell you if you still have one.

Also, you can feel the relays, if any are hot = means their bad.

 

I did check the fuse that I think is the right one downloaded the owners manual off the net but I am picking a pack of fuses up tonight along with another relay just to be safe. I tried a test light and it did not light but I am going to double check that tonight as well.

 

Dose that year have the PATS system?
Do you have 2 keys? If so try your other key.
I had a problem similar to that and I had to have my keys reprogrammed and it started right up.
Just a thought.

Phil

 

I do have pats in the truck. the theft light does blink fast. when I try to start the truck. Can I reprogram the pats myself? I am not sure if the 2 keys I have are original but I do have 2 ford keys. thanks for any info guys.

Len

 

if you have two original keys you could program a new one.

i would try the other key and see where you get with it

 

i tried both of my keys same result

 

Does one of the keys have the PATS chip on it?

 

yes both keys are ford pats keys

 

Could it be a bad PATS sensor in the steering column? Does the truck have an aftermarket alarm system?