Heres the deal, new battery and starter! Ground wire to BLOCK and ONE TO FRAME 4G wire! 1 + 4G wire to starter solenoid on fender! Used FACTORY 4g wire cable for the starter + supply! Cleaned all bat connections fender solenoid connections added dielectric grease.... Engine cranks over like its overheated, slowly cranks leaving me stranded upon long driving, before it would do its stupid thing only after a 15 min drive and leave me stranded. added new starter and it helped. I heat shield wrapped the starter at the top of that solenoid on the starter body. Could that fender solenoid cause a slow crank? SHould i replace the wire to the starter from solenoid? all connections were sanded clean and tighten good contact so why isn;t it cranking up bad starter its new? Fuel psi regulator cause a slow crank? no signs of it being bad truck runs all day unless i cut it off then has to kool down for a while. its annoying...

 

Maybe a take a picture of what you have replaced, might help

 

If you have a pmgr starter the fender solenoid is only carrying about 40A inrush, and 13A to hold.
I didn't think Ford used these until 1995?
I doubt that is the problem.

If you doubt the starter cable, a new one could never hurt!

Test with a voltmeter attached at both ends when you try to crank.
There should be no appreciable voltage drop in the cable.

Unfortunately it's not unheard of to get a bad reman right out of the box, but test the cable first.

 

I once replaced a starter after testing and the symptoms remained the same as before. I tested it and checked stuff the rest of the day. Next day I took the "new" starter back off and returned it. Next starter from same place started the veh. but was a noisy mess. Third starter worked fine and was on the veh. for years after. Never overlook the obvious just because it seems unlikely.

 

Agreed, most "new" starters come from china, and you get what you pay for. Company I use to work for had a old ford superduty boom truck with a 460 in it, the starter went back new one would last a month went through that for a year until I was at my place and it died, slapped my gear reduction in it and handed them a bill never had a issue again.
Check all your connections with multimeter ohm them it sounds like a weak ground. Also, being this is a 1990 they still had the big starter, they are prone to being heat soaked and not liking to do their job, your exhaust on passenger side is not leaking on the starter? headers?

Curtis

 

i put heat wrapping insulation at the top of the starter doesn't feel real hot at all.... You think heatsoak is the issue?

 

what voltage should i see while cranking? can i put a solenoid on from a 95 as an upgrade? how about a starter from a 95? highspeed starter upgrades anywhere?

 

If your cranking over normal when the engine is cold I would say it is heat soaked.
Yes you can swap in newer style started harness and solenoid they are the way to go. The old starters like higher voltage the gear reduction are great, 92+ ran them.

Curtis

 

When measuring voltage from two points in a circuit -Any voltage drop- will show how resistive that section of wiring is.
If you try Ohming out a section of cable you are not likely to see it because the ohmmeter is not putting any load on it.

You said you attached the starter cable to the solenoid ON the starter. (maybe I misunderstood)

I have a cheap Chinese PMGR starter from DB Electrical.
Just get the application for a later truck.
They sell direct and on Amazon and Ebay.
The difference is night and day!

That thing just works.
Plus, you never have to worry about overloading the fender relay again.

 

can you use the relay thats on the truck or do you need one from the 93 pickup? isn't their a way to get the stocker one to work or is it just a crap design...

 

Yes, you use the original fender relay..
You move the starter cable to the battery side and run a new 12Ga. wire from the relay down to the trigger terminal on the starter.