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does not shut off

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matty 401 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote matty 401 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/22/2017 at 8:56pm
thinking about taking to the 1/8 mile drag strip by me  will find out about a 35-45 minute drive with 456 gears 
72 matador 401 the beast
79 concord 2 door
72 matador 304 grasshopper
68 Rogue 360

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70 Donohue 390 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 70 Donohue 390 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/22/2017 at 9:00pm
Originally posted by FSJunkie FSJunkie wrote:

 then it could very well be the starter relay is sticking. There is a contact inside that wires the ignition coil directly to the batter while the starter is engaged. Sometimes that contact sticks on and will supply the ignition with power and keep the engine running even though the ignition switch is turned off.Whacking the starter relay with the butt of a screwdriver usually does the trick. 

Had the same thing happen to my 70 AMX on the way to its first show. I just happened to be next to a mechanic and he swapped out the ign switch and it didn't cure it. Then we swapped out the starter relay and success. BTW running a Mallory Unilite with balast resistor and 100 Amp 1 wire alt with external exciter.

Edited by 70 Donohue 390 - Jun/22/2017 at 9:05pm

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: Jun/22/2017 at 9:02pm
Originally posted by 401harry 401harry wrote:

Originally posted by matty 401 matty 401 wrote:

got the new switch in  it shuts off so far  lol

One thing i remember is i had a problem in my Matador is that I replaced my original switch even though it was still good and noticed the new ones arent as high a quality as the old ones. Plus I had to get under and re tighten the tiny screws that hold it to the column cause the new one was tighter and would move the switch back over over time where I coudnt get the key position back to off.... I also had to cut a portion of the switch plate near the bottom to clear the brake light switch as it is tight on these cars. Must only be trouble because its a GM part I guess

Somewhere in my TSM, there is a procedure to set the ignition switch. There is a wee hole at the firewall end that you place a 1/8" drill bit In to set the adjustment before tightening down the switch. So start, on, accessory and off are in alignment with key function.

As for a loose switch, that is probably why it would not shut off, but there would be some power drain along with burning up alternator. Well any how that it's replaced, who knows.

71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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