Author Topic: Loss of voltage kills engine  (Read 5452 times)

Offline blown motor

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Re: Loss of voltage kills engine
« Reply #15 on: August 04, 2015 - 10:10:38 PM »
Ok, now I'm lost. I've been following this thread because my car has been stalling at idle with the lights on. I'm not understanding this "putting both ammeter wires on the same post" bit. Please explain. Keep in mind I'm electrically challenged.
In search of the eternal buzz!




Offline 734406pk

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Re: Loss of voltage kills engine
« Reply #16 on: August 04, 2015 - 10:12:02 PM »
Wow resistive ammeter! Also very common. Glad you found it and your back in operation! Nice job!
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline 734406pk

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Re: Loss of voltage kills engine
« Reply #17 on: August 04, 2015 - 10:15:09 PM »
Ok, now I'm lost. I've been following this thread because my car has been stalling at idle with the lights on. I'm not understanding this "putting both ammeter wires on the same post" bit. Please explain. Keep in mind I'm electrically challenged.

 Do you have a wiring diagram for your vehicle? It's very helpful. Electrically challenged no problem. I can walk you through it if you want. :thumbsup:
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline brads70

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Re: Loss of voltage kills engine
« Reply #18 on: August 04, 2015 - 10:18:03 PM »
Ok, now I'm lost. I've been following this thread because my car has been stalling at idle with the lights on. I'm not understanding this "putting both ammeter wires on the same post" bit. Please explain. Keep in mind I'm electrically challenged.
It's the same as by passing it . Instead of using a nut and bolt to connect the 2 wires from the ammeter you use one stud on the gauge instead. I'd prefer a nut and bolt though.
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
 My handling upgrade post
http://www.cuda-challenger.com/cc/index.php?topic=73985.0

Offline 734406pk

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Re: Loss of voltage kills engine
« Reply #19 on: August 04, 2015 - 10:27:20 PM »
Hi everyone- I've been a member for about five years but have never posted before. I now have an electrical issue I can't figure out. My wife had my 70 Challenger out last week and called to say it wouldn't start after she had shut it off. Before I could tell her what to check it started. I started it several times after she got home and it seemed fine. I did check to be sure all electrical connections under the hood were tight. All seemed fine, then I went to drive it. It started fine so I pulled out of the drive. As soon as I hit the brakes it died. I put it back in park and had to turn the key several times but it did then start. I have checked the wiring connections under the dash that go to the ignition switch and they are fine. When I was checking them I kept turning the key to see if there was a loose connection. I never found anything. When it does start, it will die if you hit the brakes or just turn on the park lights. I have changed the voltage regulator and still have the same issue. If I wind it up to about 2500 rpm and turn the park lights on it will run but barely. I noticed when I do this the tach needle drops down to 800 even though the engine is still turning 2500. I believe something is dropping the voltage so low to the ignition when any lights are used it causes the car to die. The fact that I need to turn the key multiple times (sometimes) makes me question the ignition switch. Anybody ever had a problem like this?
Thanks in advance for any help. This is a great site with great members!

If you haven't already done so... Consider upgrading to headlight relays. It will take at least 50% of the amperage load off of your harness and headlight switch. You will notice brighter headlights and it's a great improvement. Highly recommended!
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline bobcatattack

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Re: Loss of voltage kills engine
« Reply #20 on: August 04, 2015 - 10:32:09 PM »
There's not much to doing it. It helps a lot if you pull the radio to gain access and vision. Just remove one wire and put it on the stud with the other. You won't have any way to tell if you are charging so you may want to install a volt meter.

Offline bobcatattack

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Re: Loss of voltage kills engine
« Reply #21 on: August 04, 2015 - 10:36:11 PM »
I put the headlight relay harness on a couple of months ago. After driving without it for the past five years I was extremely pleased with the improvement. It is literally like night and day! I would recommend this to everyone!

Offline 734406pk

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Re: Loss of voltage kills engine
« Reply #22 on: August 04, 2015 - 10:45:42 PM »
I put the headlight relay harness on a couple of months ago. After driving without it for the past five years I was extremely pleased with the improvement. It is literally like night and day! I would recommend this to everyone!

Excellent! Our e bodies should have come from the factory with this. It's one of the best mods to do IMHO!!
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive