Classic Mustangs (Tech)Technical discussions about the Mustangs of yester-year.
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The wiper problem is when the engine is actually running. The blades just barely move back and forth. With the engine off, the speed is pretty much normal.
As for the ignition system, no, it's not 1965 original. It's a Ford Duraspark system straight off a 1985 Granada (and y'all thought they were only good for the disc brakes!). I've connected the tach wire to the "green" wire and also the "orange" wire (as instructed by Auto Meter tech support) coming off the ignition module, as well as directly to the coil (which is one of those TFI models), and the results are the same. The tach "works" in that the needle moves with rpm changes, but only registers around 400-500 at idle, and about 1200 at 50-55 mph.
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yeah, yeah...very funny! Some other joker also suggested switching the selector in the tach from the 8-cylinder to 4-cylinder setting! Which actually would work...but wouldn't solve the underlying problem.
I'm just going to take it to a local auto-electric shop, where they specialize is this kind of crap, and see if we can't sort out what's going on. Have to wait for a sunny day, though, since the wipers won't work with the engine running! I'll post whatever we find...
I checked out that starter you mentioned. Unfortunately, neither of the 2 Ford Racing starters will work on my car, since it has a Toploader 4-speed. In fact, most all of the high-torque mini-starters I looked at were specifically for automatics or 5-speeds. Hardly any (if any!) were compatible with a 4-speed-equipped car. Odd....!
It should work if you have the right flywheel. My starter from the 3 spd bolted right up to a 90's bellhousing with the t5. Didn't you say you had a 160T flywheel?
Sorry bout the joke, couldn't help it.
No idea about the wiper blade, though my best guess is that it is some interference from your ignition coil or alternator drawing power from the rest of the system. Maybe try running a seperate power supply to the circuit for testing to see if the problem persist. If it does then it is probably the ground.
On the electrical issue, I just noticed this weekend that the engine has no ground strap, you know, the one that runs from the rear of right-side head to firewall. Not sure if it will make a difference in my case, but I'm going to attach one and see if things improve.
On the flywheel...don't know for sure, since PO claims it's off a '68 model 390 (more on this point in another previous post).
Take your car for a spin long enough for the symptom to kick in then drive back to the house, turn it off and start cutting the legs off the elephant.
When it happens again take a jumper cable directly from the battery and touch it to the starter side of the solenoid bypassing all other wiring in your car. If the starter kicks over then heat soak isn't your problem. At least not starter heat soak.
I don't think it's a component issue. I'm betting wiring. Weak grounding, connections heating up or wiring breaking down.
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