I have an 87 LX that was a 4 cyl swapped to a 93 5.0.. I replaced my clutch a few months ago and only drove the car maybe 1,000 miles since then. While I had it all out I rebuilt the starter, bench tested it and it worked great. For a couple months after that the car started up no problem, cranked strong and quickly. About a week or so ago I got in to start it and it and all I heard was the solenoid on the fender click and nothing else. It eventually turned over once then stopped then again and stopped then a third time and started running. Sometimes when it's warmer it starts sooner and others it doesn't. Now you have to turn the key on and back off a few times to get it going. Also when it does the slow cranking i believe I can hear something arcing somewhere but I'm not positive where. I tested both the power and ground wire that go from the fender solenoid down to the starter and both have about .04 ohms of resistance. This leads me to the starter but the times that it does crank right, the starter sounds nice and strong and it starts quickly. Anyone have any ideas what could be causing something like this?