engine won't shut off until low idel. it appears when alt charging there is feed to ign. stumped,any ideas would be appreciated

Your Y-Block is rejecting the scrub transplant? 
You might have to put a diode in the GEN warning light circuit?

"FREE SAMPLE"

Go to the internet and read up on wiring a one and three wire alternator. Run on will happen if the sensing wire is typed in with the coil ignition wire circuit such as the ignition switch.

Duane

Need a diode in the circuit per Lord  Gaga. Had to do that when I put a GM alternator on my antique two cylinder John Deer tractor.

Is your gas really old?
The common causes for run-on are lean fuel mixture, poor grade fuel, and too high an idle speed. Too hot spark plugs (non stock) are another possible cause.


1936 Ford 3W Coupe : 56 T-Bird 312, 47 Packard 3 speed, 40 juice brakes.
1968 Merc Cyclone FB GT 390, Getting a better front clip!
1977 Ford F-250 Supercab RWD Explorer Long box.
1976 Chev Camaro RS LT
Future rebuild : 1949 Ford F-1

using a single wire delco alternator.engine idls at 600 it will stop at idl (when alt stops charging) on warm up with choke on high idle won't stop. i cant figure out  how the system leaks  to keep running when alt charging. replaced off with new that was  new 2 months ago   ???.  

Here ya go
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Butch Lawson

Manchester,  TN

thanks will get 1 cliff

How does that diode harness work on a 1 wire alternator?


Lawrenceville, GA

years ago I read an article on how to put an early 70s gm alternator on my 56 ford.it was an easy swap but you have to put a diode on the wire that goes to the ignition switch.the switches back then weren't isolated like they are in more modern cars like the 60s on up. what happens is electicity runs through the switch so the car keeps running even though you shut the key off.I went to radio shack back then  and bought one fairly cheap and it has worked fine for 10 years or so without any problems  hope this helps.