Re: car will only start when releasing key to run position?
[Re: pyp1000]
#2334326
07/09/17 09:18 PM
07/09/17 09:18 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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if it ran before, then you have it wired right, yes you might have jostled something loose or it might just be Murphys Law that a connection worked loose at the same time as the intake swap. Pull the wire/terminal off of the "ign" male terminal on the starter relay to disable the starter then have a helper hold the key to "start" & you under the hood with your meter see if the coil and MSD are both being fed.
live every 24 hour block of time like it's your last day on earth
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Re: car will only start when releasing key to run position?
[Re: pyp1000]
#2334337
07/09/17 09:34 PM
07/09/17 09:34 PM
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Joined: May 2004
Posts: 4,920 Joplin, MO USA
Robbins
master
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master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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Try replacing the the pickup in the dizzy. Are you using a stock dizzy or MSD? I've had this issue with an 81 swb pickup with stock dizzy.
Last edited by Robbins; 07/09/17 09:36 PM.
Moparlee
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Re: car will only start when releasing key to run position?
[Re: RapidRobert]
#2334338
07/09/17 09:35 PM
07/09/17 09:35 PM
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Joined: May 2003
Posts: 4,280 Medford OR
FrankenScamp
master
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master
Joined: May 2003
Posts: 4,280
Medford OR
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Also I've found that just because something is new, doesn't mean it's good. These things can be frustrating. Good luck. Let us know what you find.
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Re: car will only start when releasing key to run position?
[Re: RapidRobert]
#2334346
07/09/17 09:55 PM
07/09/17 09:55 PM
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Joined: Jun 2006
Posts: 857 charlotte,nc
pyp1000
OP
super stock
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OP
super stock
Joined: Jun 2006
Posts: 857
charlotte,nc
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can you tell me exactly where to put the test leads to check for coil and msd spark?
I pulled the wire from starter relay as requested.
I then pulled the coil wire and Had helper turn ignition key to start and then release to run. Somewhere along that time period, I got the ever-loving snot shocked out of me. My right hand is still tingling.
Last edited by pyp1000; 07/09/17 09:59 PM.
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Re: car will only start when releasing key to run position?
[Re: pyp1000]
#2334369
07/09/17 10:42 PM
07/09/17 10:42 PM
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Joined: Nov 2007
Posts: 21,822 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
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any particular thing I should be checking at the bulkhead connector? Yes, disconnect it it from the engine side and inspect, you are looking for signs of heat/burning/melted plastic etc. Clean corrosion if evident. Reconnect and try. You can also check for voltage at the ballast resistor while cranking--I bet there is none, but it IS there when you release the key to the run position.
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Re: car will only start when releasing key to run position?
[Re: pyp1000]
#2334396
07/09/17 11:23 PM
07/09/17 11:23 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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actually, I had 11 volts in both crank and run on both sides of the ballast.
I thought that was weird. Having the same voltage on both sides of the ballast during start is normal.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: car will only start when releasing key to run position?
[Re: pyp1000]
#2334400
07/09/17 11:28 PM
07/09/17 11:28 PM
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Joined: Jan 2003
Posts: 4,270 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,270
Morrow, OH
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So I assume that you are using a Mopar electronic ignition?
I agree with the bulkhead as being a strong suspect.
I also assume that you have a ballast resistor with just 2 wires. Without removing the ballast resistor wires, I would run a jumper from the positive side of the battery to the ballast resistor (end that has 2 wires connected to it) then try to start it.
If it fires while cranking, then it does point to a bad bulkhead connector. I suspect it will fire.
Unless I'm worried about full originality, I splice wires on both sides of the bulkhead for both the high amperage wires. I remove the brass connectors, run a drill through the plastic connectors and just run the wires straight through. Have done this on a couple cars now very successfully.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: car will only start when releasing key to run position?
[Re: markz528]
#2334401
07/09/17 11:35 PM
07/09/17 11:35 PM
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Joined: Jan 2003
Posts: 4,270 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,270
Morrow, OH
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I reread your post and see that you are runnimg the MSD. With most MSDs you should not have a ballast resistor.
Where are you powering your MSD from?
I would still do what I suggested in my post above, but to the MSD power wire.
I do suspect that the way you have the box powered you are losing voltage to the MSD because of a bad connection in the bulkhead. I suspect that the MSD power is being taken off of the original ballast wiring.
PM me if you would like some additional guidance.....
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: car will only start when releasing key to run position?
[Re: pyp1000]
#2334419
07/09/17 11:58 PM
07/09/17 11:58 PM
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Joined: Feb 2010
Posts: 1,645 Phila. Pa.
Mattax
top fuel
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top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
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Hand hurt? Be thankful its not worse (yes it can be). Look at the MSD 6 instructions for how to test. Try not to do a traditional spark wire test with any MSD unless you must. Ignition power during start uses the wire connected to the coil side of ballast resistor. In other words, it comes from the starter switch bypassing the resistor. IIRC if that's not working with the MSD the MSD isn't getting turned on. Disconnect the battery and check for connectivity between the battery supply and the start side of the ballast (resistance if using a meter, light on if doing it that way). If not, then go to the back of the switch to determine if its switch or wiring. If you prefer diagrams, here's my '67 Barracuda charging and ignition wiring diagram Your colors may be different but the layout will be similar.
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Re: car will only start when releasing key to run position?
[Re: Mattax]
#2334432
07/10/17 12:12 AM
07/10/17 12:12 AM
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Joined: Jun 2006
Posts: 857 charlotte,nc
pyp1000
OP
super stock
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OP
super stock
Joined: Jun 2006
Posts: 857
charlotte,nc
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Hand hurt? Be thankful its not worse (yes it can be). Look at the MSD 6 instructions for how to test. Try not to do a traditional spark wire test with any MSD unless you must. Ignition power during start uses the wire connected to the coil side of ballast resistor. In other words, it comes from the starter switch bypassing the resistor. IIRC if that's not working with the MSD the MSD isn't getting turned on. Disconnect the battery and check for connectivity between the battery supply and the start side of the ballast (resistance if using a meter, light on if doing it that way). If not, then go to the back of the switch to determine if its switch or wiring. If you prefer diagrams, here's my '67 Barracuda charging and ignition wiring diagram Your colors may be different but the layout will be similar. Yep. Hand is still tingly. Thank you so much for the easy to understand diagram. I am going to use this as I trace down my wiring.
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