any ford mechanics?

[filthy forever]

anyone a ford tech or anyone at an independent shop with experience with ford diagnostics?

before I ramble on ill see if anyone replies.

seeing its a Datsun/Nissan forum I doubt it but never know.

 

trying to diagnose a car at my shop and would like to see if anyone could help.

[dime'n daily]

sorry wrong account that was my brothers

[JoeCool]

Used to be a Ford dealer tech until 2009. What ya got?

[EastBay521]

fords really good when it comes to tellin you whats wrong with your car.

the circle the problem for you

[MicroMachinery]

State the nature of your mechanical emergency.

[TENDRIL]

i know quite a bit about the 89 f150..... :hmm:

[Busta Nut]

Worked on a ton of'em.............what's up????

[dime'n daily]

gee thanks guys for the fast response.

and eastbay good one, im not very fond of fords hahah expecially the 3valve spark plugs :(

 

car came in after sitting for 5 years.

99 e150 5.4L

crank no start. 0 fuel pressure. no power to inertia switch.

 

sorry if I ramble

 

on the wiring diagram the pcm power relay is supposed to power up the fuel pump relay to pin 85. or atleast that's what ive gathered.

 

 

I left all my findings at work so trying to go off my head

 

both relays have power at pin 30 like supposed to.

 

now pcm power relay has power at 85 and is supposed to have ground at 86 but theres no ground, and its a body ground not a pcm provided ground or anything. checked all the wires from the fuse box. cleaned the g101 ground that the diagram showed. still nothing.so I jumped it to ground now the relay clicks.

 

fuel pump relay has power at pin 30 obviously.

but still no power at 85, and the ground for 86 for that relay is pcm provided.

 

im thinking bad pcm, but that doesn't explain no power to 85 still on the fuel pump relay so the pcm can give it ground and then send power to the fuel pump obviously.

 

sorry if I make no sense maybe I can get pictures tomorrow if the boss isn't around to maybe make it easier.

of the diagram and the connections for the relays

[Laecaon]

On a 99 F150, 86 is Key hot ign or start., 85 is PCM ground. Then 30 is from the power distribution switch. 87 goes to the PCM and it goes to the inertia fuel cutoff switch. This switch has to be manually reset if it gets triggered (for collisions). It appears the switch is connected to a light on the dash as well if it gets triggered. From the switch it goes to the fuel pump.

 

 

So when you manually ground the FP relay, do you get power at the inertia switch?

[dime'n daily]

I wish I had the paper I have at work.

I might have to wait and get back to you tomorrow when I have everything in front of me. so im not going off my head

 

the ground for the fp relay is pcm provided pin 86. if I remember correctly.

I have power at 30

im missing power at 85 which is from the pcm power relay. even when I manually ground the pcm relay cause that one was missing its ground in the first place which is a body ground

and the 87 goes to the inertia switch to pump

[dime'n daily]

customers in no rush this is the car I work on when I have down time. its already been sitting for 5 years haha

came in yesterday and just started working on it today.

[dime'n daily]

ill get back to you guys tomorrow when I have the wiring diagram and all the info.

hopefully I get time to work on it and its running tomorrow haha

[smoke]

Nothing more than a total shot in the dark here, but is the theft light flashing when you turn on the ign?