Author Topic: Hot start, electrical issues.  (Read 483 times)

myblue67

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Hot start, electrical issues.
« on: September 25, 2016, 12:00:45 AM »
1967 RS/SS, all of a sudden having stating issues when hot. Turn the key and nothing, absolutely nothing, no noises, smells, etc... Turn the key a few times and get ignition. Funny cause I had similar problems about 40 years ago with my first camaro and never figured it out. Where to start? Neutral safety switch, ignition switch, a relay, battery ground to firewall?



mikefam

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Re: Hot start, electrical issues.
« Reply #1 on: October 18, 2016, 02:55:27 PM »
I struggled with the same problem and there is no simple answer. Here is a link to my experience and a positive outcome. The car has been starting fine now in all kinds of weather for months.

http://www.camaros.org/forum/index.php?topic=13449.0
68 Convertible w/327 275hp donor engine from a 67 Impala and TH350

mikefam

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Re: Hot start, electrical issues.
« Reply #2 on: October 18, 2016, 03:15:10 PM »
What is probably happening is that there is not enough power getting to the starter solenoid to activate the electro-magnet and energize the starter motor. The problem is that it an be very difficult to find where the problem is.

You need to use a volt meter to trace the circuit from the battery to the starter solenoid. Your problem may be as simple as a weak battery or it can be one or more poor connections in the circuit.

You need good basic understanding of DC electrical circuits to troubleshoot this and I don't know your level of knowledge. So  before getting into the details of tracing the circuit from end to end there are a few things that you can try.

Clean the battery cables.

Try jump starting the car when the problem is occurring and see if that helps. If it does then it would suggest that your battery is weak.

Check that the negative battery cable is connected t the engine block. If it is connected to the body of the car then make sure that you have good ground straps between the body and the engine. I connected my battery cable to one of the water pump bolts and then put ground straps from the engine to the body in a couple if different spots.

Check out my link above and I hope it helps, Mike.



68 Convertible w/327 275hp donor engine from a 67 Impala and TH350

myblue67

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Re: Hot start, electrical issues.
« Reply #3 on: April 21, 2017, 12:42:55 AM »
Just thought I would document that after checking a dozen suggestions, I simply noted that the draw on the battery was significant on initial start. The battery was only charging back to about 60% capacity and proved that it was in those cases when I would turn the key and get nothing.  No more cheap Duralast stuff. Bought a real battery from NAPA. No problems hot or cold for last couple months.