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retired millwright first truck was 64 f100 moved up to 73,2-80s 89,93,95,13,and 14. had 80 and 93 broncos all trucks 1/2 tons. enjoy my fords now i have a 84 f150 to play with. really like the info on this site.  the 84 f150 4x4 302 4 speed when i start the truck everything is good  when the truck is run for a while and turned off it wont start sounding like bad battery or bad drag in starter. have replaced battery solinoid starter checked alternator then replaced ignition switch and key tumbler. it still does the same thing  when you let it set an hour or so it starts up like its new again. adjusted timing also. anybody had experience with this or a cure

Welcome!

My first thought was timing which you did, next would be the coil.

I’ve had coils give me a hard time starting, some when cold, some when hot.

Welcome!  

Where's home?  We have a map (Bullnose Forum/Member's Map in the menu) and I'd be happy to add you.  Perhaps you are close to one of use and we could help?

Also, it is easier to help if we know what the truck is.  You've told us something about it here, but the memory of that will fade and we'll forget.  But if you were to tell us what it is in a signature we'd not have to ask.

On the hard starting when the engine is hot, which is what I think you said, that is frequently a bad starter. And in that case it usually drags internally when the starter gets hot and expands, which is what you were suggesting.  But you said you've replaced it - right?

So, then to the next thing I've seen, which is a bad connection.  A cold engine is easier to start than a hot engine, and a poor connection might start the engine when cold.  If you have a voltmeter try the test described here to find problems in the wires or connections: Documentation/Electrical/Voltage Drop Testing.

Even a replacement starter can be bad [unfortunately]. You have checked the timing, but the next time the hot start dragging occurs, pull the coil wire and attempt to start the engine. If the engine suddenly spins faster, then timing is involved.

How about the battery to ground and starter cables? Make certain all connections are clean and tight.

Welcome! To add to the list of things that can quit when hot, the ignition module comes to mind. I’ve heard the advice that they either work or don’t and when they quit they quit but that has not been my experience.

You can also check to see that the timing retard while cranking function is working.
These DSII modules are suppose to pull the timing back to help the starter turn the truck over.

But I would do a voltage drop test on both the starter cable and ground as a first diagnostic step.

If you find fault with the new starter, I'd suggest a PMGR replacement from a '93 or later truck with the same engine.

how do i add truck in signature pic and year enough or more is better?

jarwood wrote

how do i add truck in signature pic and year enough or more is better?

Not exactly sure what you are asking, but I'll guess.  Both things start with clicking on your name or pic below the name.  Then click Account Settings.

For the pic click on Change Your Picture.  But if you are on a device w/o a keyboard that becomes difficult if not impossible after that.  If you don't have a computer with a keyboard let me know and I'll help.

For the signature click on Edit Your Signature.

Does that answer the questions?