recently purchased an f-150 w/ 5.0 the truck had sit for 4 years removed both fuel tanks installed one new tank the front one new fuel pump and new lines run to the high pressure fuel pump on the rail new gas ran sea foam 5 cans through the system

the truck starts great every time gets warm then quits

is there something that needs to be done that I missed?

It acts like the fuel is being cut off as the truck warms up

any suggestions would be very helpful. thanks

 

You need to start a new thread for this issue. I'm sure there are plenty of guys that will jump in to help.

Go here:
1980 - 1986 F100, F150 & Larger F-Series Trucks - Ford Truck Enthusiasts Forums

...and then click the "New Thread" button.

 

Actually, I made a new thread for him, extracted the two posts from the JYWS thread.

mncsweeney - We need to know the year of your truck so we have a better idea of its fuel & ignition systems.

-chris

 

1986 thanks

 

1986, OK.

Is this with EFI or a carburetor?

 

non carb efi

 

With EFI, my first approach is to ask the computer what it thinks is going on since it's a computer-controlled engine.

Here's how:

Ford Fuel Injection » How To Run a Self-Test
Ford Ranger/Bronco II EEC-IV Testing

 

Should be EFI that year unless it's been deflowered... Have you verified spark, sounds more like a possible TFI issue, module warming up then dying.

 

will check tfi module thanks

 

Seriously, pull codes. You need to know what the computer thinks is going on. You'll be surprised the amount of information you can get from this simple procedure.

If you take the TFI module in to be tested, make sure they run 5-6 loops on it in order to warm it up. Sometimes these modules work just fine when cold, but fail at operating temp.

Also, check your fuel pressure regulator, and fuel pressure at the injector rail.

Make sure that ALL your vacuum lines are in good shape.

 

thanks for your help
will let you know the results tomorrow