[raiderdave007]

I have 71 monte carlo and almost everytime I turn key off car won't shut off I replaced ignition switch and it still dosent work any ideas please help stressed out thanks dave

 

[klutchmaster427]

Does it just keep running like normal or does it "diesel"?

 

[raiderdave007]

Runs like normal its not dieseling thanks if u got some ideas please share

 

[T-bucket23]

Your alternator may be back feeding your ignition system. More info would be helpful as to what electrical modifications have been done. Sometime a diode is required in the alternator feed line. If you search for diode on here you should get the information you need. You can prove this issue by disconnecting the alternator and start and shut down the car and see if it shuts off.

 

[raiderdave007]

So on a 3 wire alternator I unplug the 2 wire clip on top or fat cable on bottom

 

[fast68]

has anyone done any wiring work on the car? something is definitely feeding back to the ign coil.

definitely try disconnecting the alt and then see what it does.

 

[dklong]

is there a electric fan hooked up to the ignition switch, if it is it could be back feeding the electrical system, I have seen this happen a few times when you turn the car off the fan become a generator and some times they'll run for afew minuites.