Well, its that time again...my truck has stopped running(its been a while). Alright here's what I'm working with:
1978 F-250 Ranger Explorer
351 M Auto Trans (All time 4x4)
Stock 2 barrel and stock intake

My truck died one night and it wont start, heres what I've changed:

Plugs
Wires
Cap and rotor
Ignition Coil

Im getting spark( I pulled a plug and watched it spark)
Im getting fuel, but its shooting out of the carb and misting all over, as I turn the engine it does this. Is it a carb problem? Also I assume its an electric choke since I dont have a choke adjustment in the cab?? I looked for any kind of unhooked vacuum lines and everything seems to be in place. Could these mean I need to rebuild the carb?

Any ideas what to do next??

 

Usually back-firing out the carb is a timing problem.

How many miles on this engine ?
What was it doing before youy replaced all these parts ?

 

Sounds like the timing chain slipped, valves are out of time with the pistons.

It is very common for this to happen when you shut the engine off. The pressure on the piston closest to TDC pushes the crank backwards a little. The sudden change in direction is what causes all the commotion. If the timing chain or gears are worn enough, they can slip.

To answer the unasked question, it may not be the teenager's fault. ;~)

Do you know how to index the engine?

 

The odometer reading is ove 100,000. Before this happened it would run fairly well- never had any major problems with it. I replaced all the parts thinking that it would solve the problem, plus I never tuned it up since I bought it about two years ago. If it is the timing, are there any posts or threads I can read on to fix it? Thanks

 

It's pretty simple: With the #1 piston at the top of the compression stroke, timing pointer on "0" or "TDC" mark on damper; both valves should be closed, Rotor should be pointing at the #1 terminal on the distributer cap. If these three events dont converge with the piston at the top of it's compression stroke, the engine timing(crank to valves) is off. Ignition timing relies on the cam/valves being in time with the crankshaft.

 

Just remember "TDC at compression stroke" and not TDC at Exhaust stroke.

Once you do this test,
you can do a chain to gear slop test as well.