a buddy of mine just picked up a 66 belvedere 383 has alot of work doe but has alot of electrical gremlins!! i used to be a drag car so the alternator was hooked back up properly no charge wire the field wire was hooked to a switch that fed 12 volts to it which also powered the MSD 6al i changed some connections and cleaned up some of the wiring and now the car won't start i thought it was a problem with the MSD box so i put in a spare crane hi-6 still nothing got a new blaster 2 coil and pertronix unit stil won't start evertthing is getting 12 volts and is grounded but the car will not fire any suggestions? also looking for sites for good wire diagrams or if someone is willing to let me know which wire goes where any help will be great!!! need fro fusebox to starter basiclly the whole charging system
I think the problem might be with the resistor (?) on the firewall. It should be about 1.5-2 inches long, maybe 1 inch wide, and 3/4 inch thick, white ceramic with 2 electrical prongs. If I recall correctly, when these go, the engine spins over, but will not start. It has been over 10 years since I owned a Mopar though.......
The Pertroniks units and maybe also the MSD (not sure) need to power up for a few seconds before they'll operate. Think like starting a cold diesel...Turn the key on and wait 5-10 seconds to start it. If that doesn't work, isolate the MSD box and hot wire 12 v directly to the coil, again waiting 5-10 seconds to energize the electronics in the Pertroniks conversion. If that works, work backwards through the system. If you have a tach, isolate that, too. MSD boxes fry tachs if not connected correctly.
ok.....got rid of MSD/crane boxes hooked a switched 12 straight to the coil hooked up the pertronix unit to the coil still nothing key goes on i get 12 volts and then it drops to 8 or 10 or so i've hooked this stuff up before my GS uses crane hi-6 with HEI/hypertech and it fires right up! not to pick on the mopar guys but the wiring genious that hooked this car up should be shot!
Can you tell us EXACTLY how you have the MSD box hooked up? The lead from the ignition switch only turns the box on. The only wires to the coil should come from the box. The Pertronics red lead should also hook to the ignition switch lead. The Black Pertronics hooks to the white MSD lead. Are you losing the voltage when you crank the engine?
