New LS1 Owners - Newbie Tech - Think I fixed my cars studdering!

I took all the plug wires and plugs out today. Plugs looked fine. No cracks. So I put the plug wires back on. And pushed every one of them on very hard. Also checked things over twice while I'm at it. The rear wire on the pass side came off very easy when I removed the wires. I think that was the issue.
Before I did this, the car had a loud fast tick on the pass side. I could hear it under the car. It got worse if I put the car in d or r and stayed on the brake. Like it was in the pass header. So I think the spark was going into the header on that side. Now the sound is gone. I'll drive the car in the morning and see how it does.

Nope. The car still flutters at wot. Well it makes a flutter sound. Like an exhaust leak. But I checked everything. No leaks. My exhaust is all welded.
Maybe my ported tb is junk. I've been told that on here.

no lights?...if its a misfire you should have a light.

no lights?...if its a misfire you should have a light.

No light. Not even a flashing ses light. I went wot many times to set the light. It won't turn on. I has it scaned and it showed no codes. That sucks, because then I would know what the issue is. I bet I did 12 wot runs to 120.

is it just a noise your experiencing or like a misfire?

is it just a noise your experiencing or like a misfire?

At first I thought it was a misfire. But the car doesn't buck. It pulls very well. I would say it's more of a noise. It sounds like a flutter. Like a exhaust leak. But there is no exhaust leak.

Leaky headers?

Leaky headers?

How would I check for that? They look tight. When the wife and I installed them, I think I went through the bolts and checked to to if they were all tight.

might be a badd lifter?
Just a guess

West Coast Bon