I was Driving home the other day. my truck just cut off. And now it wont start back up. it has spark and fuel to the rail. i even sprayed starting fluid. and it wont bark off. any help will greatly be appreciated.


Thanks Brian

 

You lost the TFI module....

 

Try to pull some codes from the computer. See if it's working and will talk to you. Here's how to do it with a old meter or testlight.

EEC IV Self Test hookup

 

He said he had spark.

 

How many miles on the motor?


When trying to start the motor, cranking over, does it sound normal or does it spin fast?
Set the timing mark at TDC and pop the dist. cap and see if the rotor is pointing to #1 plug wire or 180* from it or some place else in the cap.


Using a socket that fits the crank bolt have someone move the crank so the rotor just starts to move and see where the timing make is.
Then turn it the other way till the rotor just starts to move and see where the timing mark is and let us know how many deg. it is.
Dave ----

 

But we don't know if it is a nice strong spark or a little weak one?
I remember someone posting they had spark also but come to find out it was too weak to fire fuel.
Dave ----

 

Sorry, If TFI is working, as me FORD mechanic Uncle told me years ago, "just because you have spark, don't mean you have spark".
The translation is Get a "noid" light and plug it into the injector harness, injectors may not be opening....

If you have plug-spark, and Pressure in the rail, injectors opening?
Weak spark?.... TFI? or bad ground?........

 

I spun the motor to #1 TDC and the rotor button is on the number one plug wire. If it jumped time it would have Back fired or something? it was like you cut the key off. i had a TFI Module laying around I put it in and it Coughed once and that was it. But before it spun fast like having no compression and it still spins fast like no compression.

 

When you spin the motor over watch the rotor if it turns smoothly or skips.
Also take a compression test but spinning fast is a sign of a bad timing chain.
Dave - - - -

 

My 1985 F150 (fuel injection, 302) had the same symptoms, but I doubt it had the same issue; anyway here is how I fixed it

I was driving down my drive way and it suddenly died, I cranked it and it would not start, we tried jumping it and it would not start. We thought it was the fuel pump and it sat for about a year and half after it died on me (last tag)

I decided I was finally going to fix it and just for fun I tried to jump it; it fired right up. While I was fixing other issues it had I had started it and killed it several times and one time it started behaving exactly how it did before; would not start even with a jump.

I got the battery tested and the guys at O'riellys said "the tester isn't even recognizing it as a full circuit".

After I bought a new battery and installed it I haven't had any trouble.

I don't know what was really wrong with mine or why a new battery fixed all of my problems, but you may want to at least get your battery tested and go from there

-Matt

 

I do know there is a small ground wire that comes off the battery terminal and goes to a small disconnect, and then into the harness. I disconnected this ground and the engine died. I would check this ground and see if it's ok and not corroded. I would still try to pull the codes though. If it will not talk to you , then that is even more reason to check that ground and some of the power sources to the computer.

 

Give it a real good blast of Starting Fluid via the Throttle Body..... I see you tried, once twice? Good blast? dunno....

 

I found out what was actually wrong with my 1985 f150, I was missing around with my fuel pump (engine wouldn't start) and I realized that the pump was getting no where near enough voltage. I pulled the fuel pump relay and it was full of water. After I replaced the relay I have had no starting/ running problems what so ever.

I hope that helps with your situation.

-Matt