Starting/Firing Question
Thread Starter
Pro
Joined: Oct 2002
Posts: 670
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From: WEST BLOOMFIELD MI.
Starting/Firing Question
I have a 72 SB Auto, cold or hot engine, as I turn the key to the crank position it cranks just fine, after about two seconds I let the key go to the run position and that's when it starts, fires up as I let go of the key, I have 12V at the coil when cranking, which it should have, anybody out there understand this issue, and what is going on as to why? Thanks, Jim
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Joined: May 2006
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I have a 72 SB Auto, cold or hot engine, as I turn the key to the crank position it cranks just fine, after about two seconds I let the key go to the run position and that's when it starts, fires up as I let go of the key, I have 12V at the coil when cranking, which it should have, anybody out there understand this issue, and what is going on as to why? Thanks, Jim
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From: Sunshine Coast, Queensland, Australia
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Cruise-In VIII Veteran
It sounds like your car is starting, after cranking for only 2 seconds no less.
Problem???
So, if you continue to hold the key in the start position, are you saying it doesn't then start? Or takes longer than 2 seconds? Or what exactly?
Have I heard of starters pulling so much power that not enough is left for the ignition? I've heard of it. Don't think I've ever documented it however.
I would be checking all connections. And not just for tight screws and nuts. But proper crimps. Corrosion inside wiring, etc. Common to see wiring go green under the insulation on old cars. this creates these types of Voltage drop problems.
Problem???
So, if you continue to hold the key in the start position, are you saying it doesn't then start? Or takes longer than 2 seconds? Or what exactly?
Have I heard of starters pulling so much power that not enough is left for the ignition? I've heard of it. Don't think I've ever documented it however.
I would be checking all connections. And not just for tight screws and nuts. But proper crimps. Corrosion inside wiring, etc. Common to see wiring go green under the insulation on old cars. this creates these types of Voltage drop problems.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
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From: Cool Northern Michigan
Jim Wallace,
By chance did you recently swap-out the starter or solenoid?
I have seen this weird scenario before. Wish I could remember the fix.
Just a guess. One small wire to the solenoid small post is at the incorrect position / location?
By chance did you recently swap-out the starter or solenoid?
I have seen this weird scenario before. Wish I could remember the fix.
Just a guess. One small wire to the solenoid small post is at the incorrect position / location?
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Race Director
Joined: May 2006
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On a cold start, are you completely pressing the gas pedal to the floor two to three times, taking your foot off the pedal and than turning the key?
On a warm start are you pressing on the pedal about a quarter of the way and then starting?
Thread Starter
Pro
Joined: Oct 2002
Posts: 670
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From: WEST BLOOMFIELD MI.
Starting/Firing Issue
This morning checking spark at the spark plugs, as what I suspected, no spark at the spark plugs, in the crank mode until I let go of the key. Replaced the distributor with another one I had, car now starts as it should, so some issue with the original distributor. I will get to the bottom of it!!!! Thanks to all who commented. Jim
Race Director
Joined: May 2006
Posts: 18,731
Likes: 2,582
This morning checking spark at the spark plugs, as what I suspected, no spark at the spark plugs, in the crank mode until I let go of the key. Replaced the distributor with another one I had, car now starts as it should, so some issue with the original distributor. I will get to the bottom of it!!!! Thanks to all who commented. Jim
