Slow, then fast starting on 93LT1
Thread Starter
Race Director
Joined: Jan 2012
Posts: 17,062
Likes: 166
From: United States
Slow, then fast starting on 93LT1
My 93 LT1 uses a 96 Opti, with a DELTEQ ignition. The rotor in the Opti is cut down just to hold the metal disc that spins within the opti sensor. I then loctited the hardware to keep things solid for many years. Sealed the opti etc. Solid. No issues for several years.
When I turn the key to turn over the engine, it is very slow then spins fast to start. It has always been a fast, spins over quickly, starting engine, till Friday.
The battery is new, and always on a tender when not in use. I do have extra Opti Boxes for the Delteq, as they are spares.
What would cause the engine to start like this? Tune has been the same too..
Thoughts.
When I turn the key to turn over the engine, it is very slow then spins fast to start. It has always been a fast, spins over quickly, starting engine, till Friday.
The battery is new, and always on a tender when not in use. I do have extra Opti Boxes for the Delteq, as they are spares.
What would cause the engine to start like this? Tune has been the same too..
Thoughts.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
My initial thought is that it has nothing to do with your Opti.
In previous life (mopars) that "slooooooww then fast spin to start" was caused by a combination of battery condition, starter condition and compression/timing and then fuel delivery.
Have you changed any timing elements lately or is your starter in good condition?
In previous life (mopars) that "slooooooww then fast spin to start" was caused by a combination of battery condition, starter condition and compression/timing and then fuel delivery.
Have you changed any timing elements lately or is your starter in good condition?
Thread Starter
Race Director
Joined: Jan 2012
Posts: 17,062
Likes: 166
From: United States
My initial thought is that it has nothing to do with your Opti.
In previous life (mopars) that "slooooooww then fast spin to start" was caused by a combination of battery condition, starter condition and compression/timing and then fuel delivery.
Have you changed any timing elements lately or is your starter in good condition?
In previous life (mopars) that "slooooooww then fast spin to start" was caused by a combination of battery condition, starter condition and compression/timing and then fuel delivery.
Have you changed any timing elements lately or is your starter in good condition?
Timing has not changed in years, as it is a custom chip for the 396..
I am going to look at grounds and measure battery voltage during cranking.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Thread Starter
Race Director
Joined: Jan 2012
Posts: 17,062
Likes: 166
From: United States
So charge it via regular charger, and what about while not being driven, disconnect battery?
Last edited by krackenvette; Feb 23, 2017 at 11:29 AM.
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Thread Starter
Race Director
Joined: Jan 2012
Posts: 17,062
Likes: 166
From: United States
Took Vette off of battery tender, showed around 12.4 volts.
Let it set for a while, 2 hrs, and it was at 11.9. So, I trickle charged it 2A overnight, , barely over 12, at 12.1. I think the battery is toast. Weird, there is no date code anywhere, Sears Die Hard Gold. Just a bar code.
Called my SEARS rep, no joy, I bought it unattached to car, so it was open purchased couple years ago. She said, bring it in and she will fix it.
Let it set for a while, 2 hrs, and it was at 11.9. So, I trickle charged it 2A overnight, , barely over 12, at 12.1. I think the battery is toast. Weird, there is no date code anywhere, Sears Die Hard Gold. Just a bar code.
Called my SEARS rep, no joy, I bought it unattached to car, so it was open purchased couple years ago. She said, bring it in and she will fix it.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Again, get a new battery and enjoy the rest of your weekend. Playing with chargers and tenders is wasted effort on your current battery. As you stated "It is toast"
Team Owner
Joined: Sep 2003
Posts: 25,406
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Took Vette off of battery tender, showed around 12.4 volts.
Let it set for a while, 2 hrs, and it was at 11.9. So, I trickle charged it 2A overnight, , barely over 12, at 12.1. I think the battery is toast. Weird, there is no date code anywhere, Sears Die Hard Gold. Just a bar code.
Called my SEARS rep, no joy, I bought it unattached to car, so it was open purchased couple years ago. She said, bring it in and she will fix it.
Let it set for a while, 2 hrs, and it was at 11.9. So, I trickle charged it 2A overnight, , barely over 12, at 12.1. I think the battery is toast. Weird, there is no date code anywhere, Sears Die Hard Gold. Just a bar code.
Called my SEARS rep, no joy, I bought it unattached to car, so it was open purchased couple years ago. She said, bring it in and she will fix it.
