I have cleaned the ground behind the battery, the ground strap behind the battery and where it connects on the engine.
How would I connect the solenoid to Ford type relay? Would I just splice it into the wire connecting to the s terminal from the neutral safety switch?It sounds like something is getting heat soaked. Did you wrap the solenoid too? Back in my hot rod days we'd connect the starter lug to the solenoid with a brass strap and take the solenoid to a Ford type relay. You'd turn the key and energise the relay which would put power to the starter and solenoid both. Don't laugh, it worked
By starter lug, do you mean a bolt holding the starter in.It sounds like something is getting heat soaked. Did you wrap the solenoid too? Back in my hot rod days we'd connect the starter lug to the solenoid with a brass strap and take the solenoid to a Ford type relay. You'd turn the key and energise the relay which would put power to the starter and solenoid both. Don't laugh, it worked
If starter & solonoid is wrapped & you are still having issues . I would go with heaver gage ground & power cables ( mine were made by Napa ) & possible battery with higher cranking amp. It cured my problemsYeah the solenoid is wrapped as well