Ford 300 6-Cylinder hot dying issues and won't crank over.

[sean donato]

This went bad last summer, and the hot dying issue started sometime after we had the new one in… Wondering if this is a faulty piece? This is not the actual unit I bought, just a picture of what it is.
View attachment 1093191

Are you sure it had a grey module in it and not a black one? They don't really interchange but they will run if swapped, just not last long.

 

[Mufflermonkey]

90' F-150 with fuel injected 300 six.

Engine runs great but will occasionally die when hot (usually when idling in gear). Sometimes it starts right up and other times it will barely crank over (vapor lock??) unless you put a surge charger on it. Otherwise just it cool for an hour and it starts right up.

I have read this is an occasional issue with these engines but nobody has mentioned how to remedy it.

It is not a starter issue or bad ground issue. Cranks fine otherwise. Something is causing the engine to die when hot and then the engine is not wanting to turn over.

Thoughts?

Sounds like its overheating.Check cooling system, thermostat fan belts etc.

 

[svk]

Are you sure it had a grey module in it and not a black one? They don't really interchange but they will run if swapped, just not last long.

Not sure that’s just what it looks like

 

[sean donato]

Not sure that’s just what it looks like

Just wondering, it was sometime around when your truck was made that they made the switch from grey to black modules. They could have at least made the plugs different to avoid confusion.