I have a 79 f-250 cs 460 starts right up in morning runs good but when it gets up to temp i have to wait at least 30 min to restart any help would be great.

 

Does it crank slow, like the battery is weak? Or does it crank fast but acts flooded? Two very different problems...

Marty

 

I had a similar problem. Check the spark when it doesn't start. I used an old plug and just laid it on the power steering pump. It still may show a spark but if the coil pickup is misreading...it is firing at the wrong time. I would crank and crank and then get a backfire. My coil pickup in the distributor was bad. I had a post about a week ago. Part was under $20 and install was not bad just watch the clips don't fall in the distributor. JOHN

 

I had the same problem. It ended up being that the alternator was bad. You may want to take it to autozone, they should be able to tell you if it is good or bad.

Larry

 

are you running headers and do you have a fan shroud. headers will heat the starter up creating starter problem, ala my truck. the fan shroud part really wont have much to do with it, but if you let it idle awhile without one after awhile it begins to overheat a bit witch makes it not want to run right. hope it helps!

 

check your timing even 2 degrees can make your engine hard sarting hot retard just a touch and see if that helps

 

See my reply to post https://www.ford-trucks.com/forums/s...87#post2476087

 

I had the same problem with my truck, when it warmed up it would barely crank like the battery was dead. The problem was the cable from the solenoid to the starter, go with a 4/o gauge or bigger and it should fix it.

 

i would check the choke. if the ignition system is working properly. the choke could be sticking open. i put a mechanical choke on my 2 bbl to avoid that problem.

 

need some more info could be one of the varouis problems
timed to fast
starter
carb
coil

give us a example of when and how it won't start!!

 

Yes, I forgot about the choke issue. If the choke is too open, the engine wont fire right away causing the current in the cable from the solenoid to the starter to degrade and act like a weak battery if the cable is old and needs to be replaced.

 

just my opinion but i have had a similar problem before. mine turned out to be the coil. apparently the winding inside had broken and when it heated up the two ends would spread apart causing it to lose power and when it cooled down they went back together(thats how it was explained to me anyways). like some of the other folks i would need to know more specifics on your problem before i could be of more help. Eddie II

 

my 76 f-250 camper special had a 460 and it would do that. i always thought that it was because there is very little room inside that engine compartment for air flow and to make matters worse the 460 is a big motor and stays very hot. my carb would get so hot that when i shut the truck off, the gas would start to boil in the float bowls and it would boil out into the manifold, in essence flooding the truck so it was very hard to start.
but let us know what your truck is doing.

 

Have you disturbed the timing recently?

 

There have been several posts about this same thing and most of them seem to be specific to the 460. The most common causes are a hot starter from being so close to the exhaust manifolds/headers, timing is advanced too far, and crappy battery cables. There are other possibilities, but these seem to be the most common.

Kevin K.