i noticed ever since i have been driving this truck that after it has been run for 10 or more minutes, shut off then tried restarting it, it really puts a ton of load in the starter and both batteries. it turns over very slowly from so much amperage draw.

does this mean timing adjustment, rings,starter, batteries?

gonna tell you right off the back that it has 2 deep cycle batteries from a boat, i never replaced the rings when i tore the engine down, it has the updated metal gear timing chain set, original starter.

works perfect when the engine is cooled off or cold

 

1989 xlt 302 5.0 129,500 miles

 

Sounds like it could be TPS not working right, mine was doing the same very slow when warm. Works very much like a carb and choke.

 

Bad ICM, Ignition Control Module, distributor?

 

I'd check for codes before you go any further. The light need not be on, and all you need is a paperclip. www.fordfuelinjection.com has the details.

 

check your battery cables. all three (- to ground, + to start solenoid, start solenoid to starter) an old corroded wire can add a huge amount of load to your system. and heat only makes it worse.

 

none of the connectors are corroded, not the battery or the starter. the solenoid is fine too.

the only thing i can think of is timing. it starts fine when cold and sitting but starts hard when hot, probably a fuel issue caused by timing slack or adjustment.

if it was an electrical issue wouldn't it just short out or fail from so many over drawn voltage?

 

How old are your cables? I didn't say check your connections. the cables themselfs will deteriorate over time causing a line of problems from dim lights, poor radio signal and even burning up coils. I don't see how timing could have anything to do with a slow crank. the problem is in the start system (battery, cables, solenoid, & starter) there wont be any codes or computers problems because none of those control how fast the starter turns.