77 monte not shutting off

[luxeryvic]

hi i have a 77 monte that im restoring and i just got it runnin but when i go to shut it off it doesnt its not dieseling its runnin like normal im thinkin the ignition swith any ideas??? thanks

[j cAT]

Originally Posted by luxeryvic

hi i have a 77 monte that im restoring and i just got it runnin but when i go to shut it off it doesnt its not dieseling its runnin like normal im thinkin the ignition swith any ideas??? thanks

run on with the ignition switch off is usually with these engines/yrs dieseling ...to take the guessing out of it you simply measure the voltage 12 volts at the distributor ....switch on 12volts off o volts ....


with no voltage at the coil and the engine continues to run this is carbon deposits in the combustion chamber glowing causing the fuel vapor to ignite /////no spark needed .......

this is usually an overly rich mixture to avoid detonation .....I would get the proceedure to properly adjust the carb mixture screws ...this means a vacuum guage and tach...check timing first ..and make sure no vacuum leaks before adjusting anything ....

idle should be set to 650 rpm in gear....

[777stickman]

Could be getting feed back thru the alternator. When I installed a new gauge set in the '57 I removed the GEN warning lamp. Had to wire it back in to be able to shut it off without dumping the clutch in gear. Been working fine ever since. I was told that parts places have an item that can be wired into the ALT to prevent this but I never pursued it.

[luxeryvic]

im pretty sure its not dieseling but where on the switch and distributor do i put a voltage tester to test it and if that is the problem wat do i need to replace?

[MagicRat]

Originally Posted by luxeryvic

im pretty sure its not dieseling but where on the switch and distributor do i put a voltage tester to test it and if that is the problem wat do i need to replace?

There should be a fat red wire going into the ignition coil wiring harness(located in the distributor cap) Test this for power, both with the ignition switch turned on, then turned off. Obvouisly, it should be live only when the ignition switch is 'on'...... then let us know the results.

[luxeryvic]

ok perfect ill test it tonight and get back to you either tonight or tommorrow thanks

[luxeryvic]

ok so i got a tester on it and it reads 12 volts with the ignition on and off so wat is causing this wat do i do now?

[j cAT]

Originally Posted by luxeryvic

ok so i got a tester on it and it reads 12 volts with the ignition on and off so wat is causing this wat do i do now?

well that is the test I stated earlier ...key cycling on /off voltage must go to 12volts then to zero ...this means it must be the ignition switch ....inside the switch the body wears out and then this or other weird things occur,,,never the same ...

[luxeryvic]

ok so i gotta take the column apart and pull the ignition switch out ?

[j cAT]

Originally Posted by luxeryvic

ok so i gotta take the column apart and pull the ignition switch out ?

the ignition switch should be below the dash mounted on the steering collumn ..a rod from the key cylinder is the linkage that , moves the switch toggle...should have several wires going to it ...

get the switch first so you know what it looks like ..

the key cylinder is not the switch location ...

[luxeryvic]

ok so it ll be a separate part from the key then ok ill look for it tonight and get back to you

[luxeryvic]

ok got er off and just waitin for the new part thanks

[luxeryvic]

ok so the new switch came in and i got everything in place but it still doesnt shut off??? wat do i do now???

[777stickman]

If you have 12v at the coil with the key off and the engine off it's an issue with how things were wired during the resto.

[j cAT]

Originally Posted by luxeryvic

ok so the new switch came in and i got everything in place but it still doesnt shut off??? wat do i do now???

this appears to be a miss wiring or wires shorted out ...the ignition feed wire to the carbody wiring that always has a feed ...

using a meter check the wiring at the switch , see if you can switch power on off there with the key..it is possible the distributor was improperly wired to a feed that is always on not coming from the ignition switch as well..