1991 350 tbi hard start when warm

[91-2wd]

Hey guys long time lurker and first ever poster, in need of some help quick.

I have a 1991 350 tbi that is having issues starting when hot. heres a little backstory

I went to leave for school one morning and hard troubles starting due to the cold, eventually i blew out my starter and replaced it with a second one ( larger starter.) After replacing it with the second one the engine would crank , fire once or twice, then give up, (occasional I could play with the throttle to get it going.)

I then went into town to do some Christmas shopping (stupid i know) and then had the same starting issue after getting fuel. This time i tried to start it so many times the nose casing piece of my starter broke off and jammed up in my flywheel.

I then towed the truck home and pulled the starter along with the piece that had broken off with no issues. I then pulled all my positive battery wiring to check for corrosion and such and replaced it after seemingly finding none. I also bulled my negative battery cable and cleaned off all the grounds.

I then did some research on gear reduction starters on the forum and decided to put one in. I got one from a yard and replaced it. Cranked up easy the first time but still has the warm hard start issue.

A couple of notes that i feel might help

-My top radiator hose is soft even when truck is idling (is this normal?)
-Before the truck had issues it would bog out around 1 quarter throttle then come back to life.
-before, the truck would smell like fuel immediately after starting.
-boosting doesn't seem to help.

Really needing to get this fixed before my winter break is over so any help is appreciated boys!
I will link a video below

 

[91-2wd]

Heres when the starter jammed after getting fuel
https://photos.app.goo.gl/LuRc2GX9my5T6qpA7

And hers it now with the reduction starter
https://photos.app.goo.gl/9DSXLruyjpxU6GyF6

 

[tanman_2006]

Check your fuel pressure while running and under load.

 

[wheelman]

Sounds like the starter is.binding with the flex plate.some people call the automatic ones.fly wheels.are you sure you got the right starter.

I all so hear.it cranks like the engine is out of time.rotor button.points at number one piston up on the

Compression stroke.

 

[evilunclegrimace]

It sounds like you may have a cracked flexplate

 

[Schurkey]

Hard to tell from your description, but it seems like you have TWO SEPARATE problems.

1. Exploding starter motors. Over-advanced timing, low voltage to the starter, and failed flywheel/flexplate can all cause this.

2. Engine cranks, won't start. Verify fuel pressure. Verify fuel pump primes for 2 seconds when key is turned from "Off" to "Run". Connect scan tool, look at data stream. Pay special attention to coolant temperature sensor, air temp sensor (if equipped), short- and long-term fuel trim, and MAP sensor. Assure fuel sprays from both injectors during cranking.