[Smithpw1]

I'm at a loss with issues I am experiencing with my 2020 Camaro SS 1LE, and it has been a long time since I've asked for help on a forum so bear with me!

First off, I installed Stainless Power LT headers (even had them JetHot coated), LT2 intake, Kaetech 87mm ported TB and regular Rotofab CAI. For the most part, I have done all of the wire relocating and heat shielding to clear the headers. Nothing touches.

Furthermore, after I was finished with install. I took the car to a tuner and had it dyno tuned. We road tested immediately after, and it drove better than it ever has. Drivability was much improved over the stock tune.

However, that was the last time it seemed to run well. Ever since, I have been dealing with an issue where the engine power breaks-up/hesitates/struggles during situations such as WOT when merging onto the interstate or downshifting into 4th at 70 mph and again going WOT. Anywhere between 3k and 5.5K power is reduced. Otherwise, just driving around normal, there's no issues.

So far, I have checked plugs, reseated plug wires, retorqued intake manifold to spec, tried the stock TB just for shits and gigs. I am not getting any DTC's or CELs. None related to any of these issues anyway.

I pulled some data with an MPVI and sent it in but my tuner says fuel tables, and everything look spot on and suggest that I change my battery. The claim being that they've seen bad batteries do weird things in these cars. But I just can't get behind that, this doesn't seem like a battery issue to me whatsoever. Plus, batteries aren't cheap and I'm not about throwing parts at the problem.

Any suggestions would be appreciated.

[cjperformance]

Can you take a log with HPT and post it up?

Someone may know by armchair diagnosis, but a log will help a ton.

Are you running cats? Could they be clogged, damaged?

Ill assume your air filter is in good shape?

[Smithpw1]

Originally Posted by cjperformance

Can you take a log with HPT and post it up?

Someone may know by armchair diagnosis, but a log will help a ton.

Are you running cats? Could they be clogged, damaged?

Ill assume your air filter is in good shape?

I do have a data log I can post. I would just need to know the best way/how to post it up.

Hi flow cats installed with headers and are still basically brand new. The filter is brand new as well.

[cjperformance]

I believe you just have create a zip file and attach it. I dont think it will let you attach if not a zip.

Not at comp right now to verify on a windows machine (i use mostly linux) but should just be a right click on the file and select something like compress or archive or something.

Then when posting, click the "go advanced" button, then choose the paperclip icon and attach the zip file.

[Smithpw1]

I will post up the file later.

Additionally, I’m also going to check the TB relearn process.

[easttxss]

You should also join and post on the HPTuner forum, Gen V section. There are a few tuners on there that are very helpful. You will need to post the tune and log file on there for them to help.

[Smithpw1]

Originally Posted by easttxss

You should also join and post on the HPTuner forum, Gen V section. There are a few tuners on there that are very helpful. You will need to post the tune and log file on there for them to help.

Good call, brother. Thank you.

[Megahurtz]

put the stock throttle body back on and see if that fixes it. If so, the Katech unit may have an internal failure. I've seen this before. Usually it pops DTC codes too but not always if the tuner changed some parameters to be so far out of range.