I have a 1994 7.3 idi no Turbo
with 33,000 miles. when cold it
will start in less that 7 seconds
but after running the truck and
shutting it off it will not start until
it cools down a good bit. runs
good and idles fine when hot no
check engine. new fuel filter and
glow plugs. idk why it starts great
cold but will not start when hot
u can crank it all day. also the
speed its cranking is normal
speed when hot so its not the
starter

 

Are you certain the fuel shutoff solenoid is opening when the injection pump is hot? You should hear the solenoid click when you turn the key to the on position.

The solenoid may be sticking closed when the injection pump is hot.

 

actually I'll have to check that

 

Are you sure the truck only has 33,000 miles on it? What your describing is a worn out injector pump, but I've never heard of one wearing out at that milage. Next time it is hot and won't start, you could pour luke warm water over the injector pump, DO not use cold water, and if iit starts it conferms the pump is bad. WARNING This is extreamly hard on the pump, if the pump is good it can cause it to fail. If the pump needs rebuilt, it is not a long term fix.

 

yeah I'm sure the truck has only 33000 it only does it when its really hot so I should take warm water and pour it on the injector pump to cool it down

 

Do this to the injection pump and tell me your results:

Get her started and up to operating temperature....good warm so that the IP is warm. Shut it off....pour cold water on the injection pump to cool it off really good. Then try starting it.

 

I have an 89 F-350 7.3 doing the same thing starts good cold wont start when hot i changed the injectors cause the guy i got it off of said he thought thats what wrong with it and he said he changed the injector pump recently so i dont know what to do !!!!!!!

 

Here's a hint: If the water bath helps, then your injector pump isn't long for this world.

 

And it also raises the rebuild price to double normal because the head and rotor are worn out. Get a uhaul pump to try if the water trick works, oh and pour the water on the line end.

 

Well i talk to the guy i got it off of he said that the ip only had 75 miles on it when i got it so like 300 or so now ...anyone think maybe the fuel shut off solenoid may be causing my problems when its hot ? but it will pull start fine so i dont know....

 

Could be. When it's hot, turn on the key, and pull the wires off of the solenoid. There should be an audible clicking.

 

Pouring luke warm water on the fuel injector pump really does work. Now it time to find a good fuel injector pump. We have been having problems for years with this and our mechanic was unable to diagnosis this for us.

 

My truck was doing the EXACT same thing when I bought it. The previous owner didn't tell me about it, and when we stopped to eat on the way home it wouldn't start back up. Not cool.

Bought a remanned IP from Columbus Diesel Supply, worked like a charm.

 

Ok i have a 1995 powerstroke turbo has 236,xxx miles mods are 3 in down pipe dp tuner 6637 cold air intake mod... I've had the truck for bout two year put roughly 25,000 miles on it starts up cold runs great no missing or no lose in power no hesitation or nothing warms up shut it off won't start back till cools all the way back off then fires up and does great till turned off again then won't start back changed cam sensor un hooked batteries for bout an hour nothing un hooked chip nothing plugged it up and nothing while hot let it cool down fires right up drive anywhere till you shut it off someone help please lol

 

You're on the wrong forum for that truck, but it's probably the same thing.