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does not shut off |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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Ok, i looked over what may cause self excitation of the alternator. Here is a simple test. With engine off and key is off, disconnect the orange wire from the alternator. It Is your sensing wire for the bulb and regulator. Put tape around the connector to make sure nothing metal comes in contact for good measure. Turn the ignition key to accessory and then on, while looking at the charging light on the dash. Normally it should light up, but if it stays off, the positive rectified diode is shorted, thus allowing self excitation by not isolating field from battery. This can slowly drain the battery after sitting. Hopefully is Is not the case, but it would allow your engine to run.
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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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401harry
AMC Addicted Joined: Sep/27/2011 Location: Clearwater,Fl Status: Offline Points: 758 |
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Sounds like an ignition switch to me but Is this a under the cap crane module on the stock distributor? I have had no luck with those conversion modules including a 72 I once owned maybe because i was using the stock resistance wire feed? For that car and my current 73 Matador I used the the anti dieseling solenoid wire for power to my DUI HEI on my 73 Matador which is the large yellow wire coming from the firewall and comes directly off the switch at a full 12 volts and never any problems and then switched to a Mallory Unilite and also no problems. I have a Crane fireball ignition going in with the new 401 and will use the same power supply.
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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Yep, the igntion wire is the problem for most devices to control spark. There should not be any resistance on a voltage going to the electronic ignition module pf any type. Unless it is specifically stated in the directions that it is a dorect factory fit and does not require additonal wiring. I also used the yellow wire from the anti - dieseling soleniod as well for my electric choke on a Holley. Maybe I am stickler, but I would rather put the power lead to the electronic ignition coming off a relay controlled by the I terminal of the solenoid and secure the ignition wire from being used and out of the way. The relay can mount near the starter solenoid and be fairly clean with installing. I see no need for a kill switch with that setup unless you are racing all the time. To add a kill switch to the relay, just put it inline with the feed from the I terminal to activate the relay. The kill switch would be a momentary off switch or button. |
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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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matty 401
AMC Addicted Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1730 |
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this unit just attaches to the coil and it is the under cap style with a stock dist i am running a 94 amp single wire alt also
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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You did say you obtained a new ignition switch, i assume you will be installing it soon? Hopefully that will be your issue. |
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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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matty 401
AMC Addicted Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1730 |
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yes picked it up yesterday been working in my garage so maybe tomorrow
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5903 |
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Did not read entire thread.
When I put an MSD 6 Box and a UniLite Conversion in my stock Distributor, I also had a run-on after ignition was turned off. Using the MSD instructions, I "cured" the problem by installing a Dual Ballast Resistor as shown in this diagram ( on a '69 AMX ) The single Ballast Resistor in the Diagram was to make it all work correctly with the Stock Tachometer. x x
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matty 401
AMC Addicted Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1730 |
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got the new switch in it shuts off so far lol
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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Well, considering how long you were able to run before the trouble, i can see why changing something you know had worked for something questionable, like the switch. If your system was stock, i would have kept on the ignition switch being sticky. Well you may never see it happen again. One of them odd things, as usually they just go bad and not start or fail to connect power. Great to see it working out for you. |
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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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401harry
AMC Addicted Joined: Sep/27/2011 Location: Clearwater,Fl Status: Offline Points: 758 |
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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 |
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