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Vladgmru
Vladgmru, Automotive Electrician
Category: Ford
Satisfied Customers: 2510
Experience:  I've been working with American made cars since 1992.
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1996 ford f-250: />Engine cranks but wont start..intermittent

Customer Question

1996 ford f-250 w/460 & E4OD transmission.
Engine cranks but won't start.
Problem started as intermittent then just would not start.
Replaced the ignition module, started fine.
Problem reoccurred 2 weeks later intermittently then would not start.
Replaced the coil, it would still crank but not start.
I checked the coil with a spark plug tester and wasn't getting any fire, then 5 minutes later it started fine.
Submitted: 5 years ago.
Category: Ford
Expert:  Vladgmru replied 5 years ago.
HelloCustomer
Thanks for choosing JustAnswer.
My name is Vladimir.
I have a question, please reply in this thread.
Did you install an original Motorcraft ignition control module?
Customer: replied 5 years ago.
no I bought it at napa
Expert:  Vladgmru replied 5 years ago.
Well, since your problem is intermittent, I would use an original Ford part.
I have seen a lot of problems with such non-original modules , especially when they get hot.
You should also check that you get +12V at the ignition coil and module ( Red/Light Green wire) when the engine won't start.
Use this wiring diagram graphic:
Customer: replied 5 years ago.
Where would the problem be if I don't get any voltage to the coil?
Could it be a resistor getting hot then having time to cool off?
Expert:  Vladgmru replied 5 years ago.
Sorry for the delay, I had my breakfast.
Voltage to the ignition coil, module and distributor hall-effect switch comes from the ignition switch via the fuse #22.
What resistor are you talking about?
Customer: replied 5 years ago.
It was just a theory posed to me earlier by a friend, I just wanted to verify.
Sounds to me like I might just have a loose wire somewhere, maybe.
Though it wouldn't hurt to thouroghly clean the ignition module connections either.
Expert:  Vladgmru replied 5 years ago.
Your vehicle does not use a resistor in the ignition system.
Yes, it is possible that you have a bad contact somewhere in the wiring.
I do not think you have any problem within the ignition module connector, it is a quite reliable sealed connector. Check for +12 voltage at the moment it has no spark and if it is, try using an original Motorcraft ( I suppose it should be DY1075) module.
Vladgmru, Automotive Electrician
Category: Ford
Satisfied Customers: 2510
Experience: I've been working with American made cars since 1992.
Vladgmru and 10 other Ford Specialists are ready to help you
Customer: replied 5 years ago.
Thank you
Expert:  Vladgmru replied 5 years ago.
You are welcome and thank you for accepting my answer.
This part number should be verified.
Let me know how it turns out.
Regards,
Vladimir.

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