MY 87 F250 3/4 4x4 302/5.0efi ran then i parked it then a day later it stopped running i checked spark there is spark it has a msd plug wire and cap i checked fuel i dont have a fuel presure gauge but i just replaced the on the rail fuel pump and filter the rail has fuel in it when i press the tire release looking thing on the rail it shoots out gas idk why it will not start, when i got it to start one time i sprayed starting fluid into the air intake hose and it started right up ran smooth no hiccups or studdering...so it wont start but if it can get started it runs fine.
when i turn the key it turns fast but wont catch and try to fire it just spins and spins.

i have no idea what to do i just got this truck from my dad and i drove it for like 5 months and now it has done this but i dont have anyone to help me can someone please tell me what to try next or what might be going on thank you

 

you are going to need a fuel pressure gauge to see how much fuel pressure you really have . spec is 35-45 psi, engine off.

 

When you turn the key on, do the fuel pumps keep running?

 

It does the 2 sec pump then waits for the key I just bought a new fuel pump for the rail under the door could it be a in tank pump problem im gonna borrow my friends fuel pressure gauge

 

You should also try pulling the codes.

 

how the hell do i pull codes on it its a 87 and wat code reader would i need i mean doesnt the computer in this thing just operate the fuel injection system

btw is there anyway it could be the computer that is bad i tried to cross a pond lik a month ago and it was like seat high water which i looked woulda hit the computer but like i said it was a while ago why would it stop working now it ran all that time after the pond so

 

Do a google search for "Ford OBD1 Codes", and you'll find many many guides to pull the codes. You only need a paper clip to do it. If you don't want to do that, the Innova 3145 code reader can pull the codes and it costs $25.

 

I am not a fan of this write-up but it does work: Ford ? OBD/OBD2 Trouble Codes

The Diagnostic Data Link should be located near the driver side hood hinge.

Or as Ian suggested invest in an Innova 3145 Code Reader.

 

 

Alright, so did you hook a fuel pressure gauge up or check for codes yet?

 

I looked at the link for the codes and I dont ilunderstand how to check so I hook up a touch light pen to some ground and start touching holes in there?

 

I suggest you go and purchase an Innova 3145 Code reader if you don't feel confident in checking the codes yourself. They cost about $25.

 

So I ran the code scanner and it pulled a 11 84 and a 10 the others r good but a 10 isn't even a thing so wtf is a code 10 a d I still havnt been able to to get a fuel pressure gauge so now im checking to see if i put the new fuel pump on backwards it didnt have a shown direction anywhere but I put it on the way the old one came off but well see but yea anyone know what a code 10 is ....just so u didnt know i bought a code reader
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10 is just a spacer code. Any auto parts store will rent you a pressure gauge.

 

How do I know what ring and pinion to get for my axle is it long or short it's a ford 10.25 or sterling 10.25