Author Topic: Starter Gremlin?  (Read 705 times)

Offline cv70chall

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Starter Gremlin?
« on: December 16, 2019 - 01:24:58 pm »
I've run across something strange regarding my starter- and thought I had solved the issue- but apparently not.
1970 Challenger
440/ Auto
Relatively new starter
NEW Battery

Starts up fine when cold. 90% of the time, starts right up, whether having driven the car for 5 miles or 25 miles. Every so often, when I went to start the car, it would behave as if the battery was low. After several attempts, it would finally start. Initially, I thought it was heat-related, as this was happening generally over the past year. (I live in South Florida)
I purchased and installed a heat shield blanket over the starter to keep the heat down- and it seemed to work fine until yesterday- when after stopping twice, it almost wouldn't start- again, acting as if the battery was weak or dead.
Any ideas on what this could be? I will go back and check all the cables for corrosion, although I'm fairly certain they are fine.




Offline 70chall440

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Re: Starter Gremlin?
« Reply #1 on: December 16, 2019 - 07:55:36 pm »
Check and most likely replace the positive lead down to the starter (the big red one), I had pretty much the same issue on my Challenger and in my case the lead was loose (which I discovered when I went to put in a new starter because I thought the one in the car was bad). I say "replace" because if it is an original one, they can and do corrode internally which draws a huge amount of amperage making starter act the way you describe; however you might just try cleaning the terminals really well and see if that helps.

Unless your headers are really close to your starter and/or you are running a high compression engine, it is probably not heat soak on the starter; many of those cars were sold and driven in FL as well as everywhere else its hot for many years without this issue.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline cv70chall

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Re: Starter Gremlin?
« Reply #2 on: December 17, 2019 - 01:56:07 pm »
I'll get under it over the weekend and check everything again.

Thanks !!

Offline jimynick

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Re: Starter Gremlin?
« Reply #3 on: December 17, 2019 - 07:16:22 pm »
Don't forget to check engine grounding as well as the hot side, because the current can't flow any faster or better than the conductor carrying it.  :cheers:

Offline 70chall440

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Re: Starter Gremlin?
« Reply #4 on: December 18, 2019 - 12:14:01 am »
Don't forget to check engine grounding as well as the hot side, because the current can't flow any faster or better than the conductor carrying it.  :cheers:

 :iagree: well worth running a heavy gauge ground from your engine to the frame.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline cv70chall

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Re: Starter Gremlin?
« Reply #5 on: December 19, 2019 - 03:41:31 pm »
Thanks again.
Yes, I have a 4g ground engine ground from the block to the firewall which looks solid. I'll check the entire hot side when I get under it.

Offline jhaag

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Re: Starter Gremlin?
« Reply #6 on: December 19, 2019 - 07:14:20 pm »
Once you have exhausted all the possible electrical gremlins, check your initial ignition timing. Too much initial advance will give you the starting headaches you are describing. Also a "relatively" new starter and or battery could be the issue. Check it all...
love 70 Challengers

Offline 70chall440

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Re: Starter Gremlin?
« Reply #7 on: December 19, 2019 - 11:37:16 pm »
When you say it the ground is going from the block to the firewall, what or how is it connected to the firewall? I ask because I typically use nutserts to attach anything to the firewall because sheetmetal screws don't last all that long as they will vibrate loose and/or corrode relatively quickly
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline cv70chall

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Re: Starter Gremlin?
« Reply #8 on: March 16, 2020 - 01:20:28 pm »
Hello everyone,

Got her up in the air, removed the blanket and all the connections from the positive side were fine- no corrosion. Decided to remove the OEM style starter and replaced it with a new smaller hi-torque model.

Fires right up!


Offline 70chall440

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Re: Starter Gremlin?
« Reply #9 on: March 16, 2020 - 10:35:53 pm »
Outstanding!!! Congrats
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)