Wow, I've been too busy to ck on this list, so perhaps someone has posted
this very same problem during my absence....but I doubt it.
On my 90 Syncro with Tiico conversion : Replaced the starter with
new/rebuilt Bosch and did the Cold Start Relay mod while I was at it because
the Ingition Switch had only been delivering around 8V to Starter Terminal
50, so starting with the key was hit and miss. Immediately following Starter
R&R and Relay mod, I tried to start it and nothing....nada! Checked voltage
to solenoid and it was now only getting 1V.......no problem as I had a new
Ignition Switch itching for the job. I put it in and presto!! Starts right
up every time.....and sure it would. Why not? Well, now, to my surprise,
when I revved the engine, the starter engaged again. I quickly shut it down,
then restarted and no problem. Rev the engine and starter engages. Shut
engine down and restarted....no problem. Pulled red/blk wire from terminal
50 on Starter Solenoid while engine is running and hooked up multi meter to
it. Revved engine and got 13V!
This vehicle has always been fine and has never done this before.
Immediately I think that it is the Ignition Switch, but..........
It may matter that it is equipped with a battery isolator and until today,
the only thing that ever changed when I revved the engine was that the
Alternator light would turn off..........
Thanks for your help!!..........Miguel