OK , been thinking, what would I do? Pull the RCM , it takes 2 people , when starter engages ,does the engine control relay function? Can you manually engage the relay to get the engine to turn over? Also there's a way to test the starter (8F-33) in the manual. You know the starter is engaging , even though, intermittently. Remove an replace (clean) the connection on the starter (+ an -). Check continuity on the solenoid. Here's where I stop, with what I see. Hope it helps, let us know.