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My guess is I got a bad rebuilt starter. I cleaned the area with steel wool before I put the new ground lead in place, so that's not likely the cause. If the starter relay was bad, then bypassing it with jumper cables would get the starter to kick in. Process of elimination would indicate the starter, even though it's only been in a few weeks.
(drum fingers on desk) Time to pull it and take it back to the shop for testing.
Oh, easy there Stan. In the general sense, as long as the ground strap is ON the block(a clean spot) and the three(or even ONE) bolt is holding the starter in its place then there "should" be sufficent contact for it to receive enough current to operate properly. Now, granted if "everything" was wrong with set up, it could be poor enough to create issues but I am thinking towards it being more than adequate.
Nothing so far, but I've been out of town and busy as all getout for the past several weeks. I've got myself a volt meter, figured out how to use it, and I'm going to take Robert's list of suggestions out to the garage before it gets too dark and try them out.
had my ign switch go bad on me with my old 240Z, it took a lot of troubleshooting for me to catch that. Even with a fresh batt, new cables etc. the switch was worn to the point where it would just spin the starter motor & nudge the pinion out far enough to grind the flywheel some... a new ign switch solved the problem in that case. not as likely on an f100 but possible after these decades.
-- you probably have her running by now anyway?? here's hoping anyway. a voltmeter is a great thing to have
Just to chime in, a month late --- I have the same truck (68 F100) in California. Replaced the starter in it about 6 months ago. It started maybe a dozen times, then refused. I figured I had done something amiss and shrugged it off, got busy and didn't play with it for a while.
Anyway, I just replaced the starter again, and received a DOA unit directly from the store. Yes, I should have had them test it first. I took it out of the plastic, cranked it into a vise, and hooked it up, neg to bolt hole, tap pos to the threaded positive lead. Spark, but no spin. Good thing I kept the receipt.
I suspect we may be getting them from the same place, and there may simply be a bad batch out there. I'm going to have the shop test the next one before I bring it home.
Couple weekends ago I had the same problem with my 68. Put a lifetime warranty starter in on Saturday and it fixed it right quick. Then Sunday I made a trip to the yard waste dump site in town and the starter wouldn't do anything once I got there. Lifetime warranty and it barely made 24 hours.
I suspect we may be getting them from the same place, and there may simply be a bad batch out there. I'm going to have the shop test the next one before I bring it home.
no one sells a good starter anymore. not even the brand new units are good. the only rebuilt one that has worked is the one i bought form my ford dealer it was 80.00 but worth it . try www.motorcraft.com
I try to avoid the normal retail places altogether. There ok if you need some towels or an air freshener or maybe some plastic neon lights for your gas cap. Napa still has ok parts but I would try a local shop that rebuilds alt's and starters I've always got good ones for a good price. Friend of mine went thru 4 altenators before getting one that worked longer then 24 hours from Autozone.
I tried all the troubleshooting steps detailed in an earlier post and they all came out fine. Dropped the starter, tested it, and it worked fine. Put the starter back in the truck and she fired right up.
Conclusion: the starter just wanted to go for a walk. OK, the real reason is the gears just needed to be reseated so they meshed properly.