Car Quit In The Parking Lot: HELP
#729431
06/20/10 11:21 AM
06/20/10 11:21 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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OP
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I was driving the Challenger this morning and I pulled into a parking lot to tune the in-gear idle vacuum. The car ran great and I just finished tweaking the carb and while I was walking around the car, it quit running. There was no hint, it just shut off like a light switch. I had voltage, I had fuel, but I could not do any ignition checks. The car sat for 15 minutes or so while I tried to figure it out and then I started up and it was fine for about 10 seconds then died again. Then about another 15 minutes went by and I tried to start it again and it was a bear to get running and then when it finaly did, it was sputtering and puking and I was fighting to keep it running at 1800rpms or so. Then it just slowly died again. I got my AAA card out and it is now sitting in the garage. My thinking is that the coil or the ECU puked out. Any suggestions? Note: It does not have a ballast and it has a 3 month old "non-ballast" Mallory coil, 4 year old FBO ECU and distributor. I have another old coil and Orange ECU box to test out but I wanted to get some advise before jumping in on it on FATHERS DAY. It was a crapty start for my Fathers day having one of my kids with me and having the whole family watch the car bing loaded onto flat bed, but hopefully my day will get better. Happy Fathers Day to everyone. Thanks
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: Pacnorthcuda]
#729434
06/20/10 12:37 PM
06/20/10 12:37 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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OP
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No ballast, and the coil is only 3 months old and it is one of the Mallory epoxy coils. I would hope that these last longer than 3 months. I am charging the battery now since I cranked with it for a long time. I might have some time to check the wires at the bulk head later on today. thanks
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: stumpy]
#729436
06/20/10 01:49 PM
06/20/10 01:49 PM
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Joined: Apr 2010
Posts: 1,216 Under My Car
Mopar_Country
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pro stock
Joined: Apr 2010
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Under My Car
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Quote:
Why no ballast?
What he said.
Any part can go bad prematurely, I would seriously look at the coil especially if you haven't been running the ballast. The ballast takes over after start to lower the voltage to the ignition system. With no ballast it has been running at full voltage constantly, unless there is a specific reason the ballast has been deleted. I'm certainly no "expert" but I can speak from experiences from owning a lot of Chrysler products in the past 35 years.
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Re: Car Quit In The Parking Lot: HELP
[Re: SomeCarGuy]
#729438
06/20/10 02:09 PM
06/20/10 02:09 PM
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Joined: Apr 2010
Posts: 1,216 Under My Car
Mopar_Country
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When the engine is running, you can get by fine with a lot less current at the points. That's the purpose of the ballast resistor. If the points were to receive full battery current/voltage at all times, they would only last a few hundred miles before needing replacement. On the same token with the electronic system it protects your coil from premature failure, unless your running aftermarket stuff such as MSD.
At the time of cranking (when the starter is operating), a separate wire gives the points the full 12 volts, bypassing the ballast resistor. When you release the key from "start" to "on", all the power to the points now has to flow through the ballast resistor, preserving the points.
For the .002 second performance gain, it's not worth running your coil at 12+ volts when it's designed for 9v. You wont wreck it right away, but you will shorten it's life.
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Re: Car Quit In The Parking Lot: HELP
[Re: Mopar_Country]
#729439
06/20/10 02:16 PM
06/20/10 02:16 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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The Mallory coil is designed to run without a ballast and I don't want one. I blew a ballast this spring so I changed to a different coil.
The battery is now charged so I am going to check some voltages. Thanks for the replies.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: Pacnorthcuda]
#729440
06/20/10 02:54 PM
06/20/10 02:54 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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"Blue and green wires very near the brake booster. These spade connections often fail after this much time."
Check out my picture. The blue wire is burned about half an inch back from the connector. Is this my issue? If so, what is the best way to fix it since the wire is potted into the connector?
Thanks
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: Mopar_Country]
#729441
06/20/10 02:58 PM
06/20/10 02:58 PM
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Joined: Feb 2003
Posts: 10,220 Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
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Quote:
When the engine is running, you can get by fine with a lot less current at the points. That's the purpose of the ballast resistor. If the points were to receive full battery current/voltage at all times, they would only last a few hundred miles before needing replacement. On the same token with the electronic system it protects your coil from premature failure, unless your running aftermarket stuff such as MSD.
At the time of cranking (when the starter is operating), a separate wire gives the points the full 12 volts, bypassing the ballast resistor. When you release the key from "start" to "on", all the power to the points now has to flow through the ballast resistor, preserving the points.
For the .002 second performance gain, it's not worth running your coil at 12+ volts when it's designed for 9v. You wont wreck it right away, but you will shorten it's life.
One of the recent Mopar mags had a question about running a 12 volt coil w/o the resistor, the reply was that it would cook the ECU box. Why would that happen? I thought the resistor was to keep the coil from seeing the full voltage?
The car in question had an MSD coil designed to run on 12 volts.
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729443
06/20/10 03:13 PM
06/20/10 03:13 PM
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Joined: Dec 2007
Posts: 7,759 So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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Easiest way to check is to use a jumper wire from the battery to bypass those wires. If it starts, most likely it is your problem.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: Car Quit In The Parking Lot: HELP
[Re: Mopar_Country]
#729444
06/20/10 03:17 PM
06/20/10 03:17 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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The coil in question does have an internal resistor. This is a picture of the inside of the bulkhead. This side shows signs of being burnt too. How can I fix this at the connector or do I need to pull the connector and reroute this wire around the bulkhead?
Thanks
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: Mopar_Country]
#729445
06/20/10 03:17 PM
06/20/10 03:17 PM
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Joined: Feb 2003
Posts: 10,220 Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
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Quote:
The MSD coil was probably set up with an internal resistor.
That would mean that if you ran the OEM balast that the coil was operating on less than 9 volts, correct?
I'm wondering if I'm cooking the ECU in my car since I jumped the ballast. Blaster 2 coil.
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Re: Car Quit In The Parking Lot: HELP
[Re: buildanother]
#729447
06/20/10 03:51 PM
06/20/10 03:51 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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This is my current Mallory non ballast coil. What is the best/safest way to fix the above burnt ignition feed wire?
Thanks
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: stumpy]
#729450
06/20/10 04:08 PM
06/20/10 04:08 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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Do the new terminals just press into place on oth connectors? Bama: I do have another ECU to test but since I found this burnt connector issue, it needs to be fixed first. The inside of the connector (second picture) shows that the blue wire only has a few strands holding it onto the spade due to the burnt sheilding of the wire.
Last edited by YO7_A66; 06/20/10 04:11 PM.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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