Starting mystery

[tdavis2000]

Hey All,
First time poster here.
I've got an '89 3.0 LWB that runs well except when starting.
Here's the clues:
-Starts perfectly when cold.
-When warm, when I turn the ignition, I sometimes get a single "click" (like a solenoid sound)
or it turns over 8 or 9 times before finally starting weakly.   
-I've recently replaced the fuel pump, distributor, and the starter.

Ring a bell for anyone?

Thanks!
Terry

[RXIN HED]

Check your ground and primary wires for corrosion and oil soaking, both lead to high ohms and lots of current loss

[TOASTY]

 Some of those trucks had capacitors that leak when they get old and hot, the acid then leaks on the injector drivers or so i recall. Eventually it lets out the smoke and stinks (also no longer works).

 Another thing to check is the "Power Unit" they do weird things when they start going and a shitty coil wire can too.

[tdavis2000]

Thanks for the advice guys!!!

Terry

[anothersteve]

 Hope you solved your Mysteries, but wanted to comment on your choice of color and black detailing . Be nice to see other photos and interior. Very clean looking ride.

[IncorpoRatedX]

Ohm test the coolant temp sensor regarding cold start fuel enrichment. It's a two-pin sensor on the thermostat housing. When it fails it can cause it to read the wrong coolant temp and either run the engine lean/rich depending on how it failed.

[tdavis2000]

SOLVED:
It was a compound problem between the starter and a sensor issue inside the distributor.   Replaced the starter and the distributor module.   
And it ran great for a few weeks.

Now it's the throttle position sensor and the injectors throwing codes.

Looking for a good mechanic in the Los Angeles South Bay area, if anyone has one.

Thanks,
Terry