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Stumbling Problem When Upshifting

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Old Aug 25, 2023 | 11:52 PM
  #1  
1ScrudeDude's Avatar
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From: Boring Green, Kentucky
Default Stumbling Problem When Upshifting

No one can figure this out. I now have a 98 C5 M6 Corvette. My 10 SS Camaro was totaled in a mysterious fire.

My C5 has some issues going from 1st to 2 second on WOT. I get it up to 5500-6000 in 1st, then when I get her into 2nd, she falls flat on her face. It lasts about 2 seconds, then the motor picks up again. The motor doesn't stall, but the loss of power always puts my face into the steering wheel.

98 C5, heads, cam, nitrous, long tubes, and every bolt on your can think of. She dynoed at 516rwhp with nitrous, which to is kinda low to me. I had a tuner slap on the 200 shot wet kit. I thought he was going tune it as well, but when I picked it up, he said it was already tuned, so he didn't do it. Aren't you supposed to re-tune after a nitrous install? This is my first nitrous car. Please keep in mind, that this event occurs with the nitrous unarmed. The internals are forged.

Here is what the previous owner gave me:



The previous owner left a few things out. He wasn't good about a spec sheet.


I'm ready to race, but 'can't seem to wrap my head around this.

I would gladly welcome any theories, thanks!

-Tom

Last edited by 1ScrudeDude; Aug 26, 2023 at 12:02 AM.
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Old Sep 15, 2023 | 03:54 PM
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Curios too.
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Old Sep 15, 2023 | 05:21 PM
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1ScrudeDude's Avatar
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From: Boring Green, Kentucky
Talking

Originally Posted by cregsimpson
Curios too.
After going to to 5 different "speed shops," I finally found someone to address the issue. I looked for months and this was my last resort. Ronnie was great. The C5 threw a code earlier that week; it was an ignition coil. So Ronnie found it in the history. He then ordered and installed higher rated performance coils, and also got me a high performance ECU.

Problem gone!!! I was elated! Not only that, the C5 is definitely snappier. She feels like she was sprung! Also, Ronnie gave me some cash back after I paid in cash.

I LOVE HAPPY ENDINGS!

PS: N20 bottle is full. I hope the motor doesn't get all blowed up!
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