No Start When Warmed Up?

[DuallyGuy]

Hello There,
My Dually starts right up first thing in the morning. But once I park it and run in to the auto parts or something, it has a very hard time starting once the trucks warmed up. So bad, that I'm afraid it's going to leave me stranded. Any suggestions as far as what I should replace/repair? Thanks for your input.

 

[Smitch320]

maybe something with the timing and starter?

 

[Jims86]

How long does the fuel pump prime? on a k30, its supposed to prime for 15-20 seconds. You may have an ignition part starting to give up, coil or module. Check for proper fuel pressure too. 9-13 psi in your case.

 

[Boone83K10]

check what jim86 said but a couple of other things to consider are...

1. Vapor Lock
2. timing is too retarded or advanced.
3. overheating the starter

my guess is vapor lock.

 

[fastnloud]

Sounds like maybe heat sink on the starter. Do you have headers on the truck? I think you can get heat shields for the starter as well.

 

[bucket]

Has trouble starting because it doesn't like to crank?

A weak battery can also be to blame. I've had that happen a few times on my trucks... I think the starter is getting heat soaked on a hot start, but the battery ended up dying later on. With the new battery, no more hot start problems. Just happened on the '88 Burb actually. I thought I had occasional heat soak the last couple months, but the battery died on Monday morning. Now with the new battery, there's never any trouble at all.