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CMAR · 04-29-2024, 01:47 PM

Good morning all.

Looking for some much needed help.

Problem: exhaust smoke.

I have a 2019 camaro ltg. No tunes, only bolt ons. About 2 months back I started noticing smoke out the tail pipe while driving. I noticed it only happens when in gear and when letting off the gas. Prior to the smoke I had another issue with a squealing noise from under the hood. I soon found out it was coming from the built up oil pressure. When I removed the oil fill cap, the noise instantly stopped. I monitored oil pressures and everything seemed as it should. I did some research and decided to add a vent cap. However this caused excessive spray under the hood. I then added an additional catch can that was vented. This helped tremendously with not having the MAF covered with oil, and it also stopped the built up pressure. No smoke. After a month I decided to just run two regular catch cans (no breather) and instantly I began blowing smoke out the tail pipe. The contents in the catch can was milky. But it was heavily diluted with gas. I decided to return to using the catch can with the Breather, and I am still getting an abundance of white smoke from the tail pipe. Does anyone have any suggestions, advice, criticism, etc. I just ran blue devil, it seems to have helped a bit. But it's like I'm driving a lawnmower with a f^up carb. Below are the modifications I made.

Injen CAI
Zzp high flow catted downpipe
Zzp larger throttle body
American Thunder Axle-Back Exhaust
Two catch cans

Current DTC's
P0420 permanent
P0171 comes and goes
P0131 comes and goes

04-29-2024, 01:47 PM	#1
CMAR Drives: 2019 Camaro 2.0t Join Date: Nov 2022 Location: Arizona Posts: 20	White smoke. Exhaust Good morning all. Looking for some much needed help. Problem: exhaust smoke. I have a 2019 camaro ltg. No tunes, only bolt ons. About 2 months back I started noticing smoke out the tail pipe while driving. I noticed it only happens when in gear and when letting off the gas. Prior to the smoke I had another issue with a squealing noise from under the hood. I soon found out it was coming from the built up oil pressure. When I removed the oil fill cap, the noise instantly stopped. I monitored oil pressures and everything seemed as it should. I did some research and decided to add a vent cap. However this caused excessive spray under the hood. I then added an additional catch can that was vented. This helped tremendously with not having the MAF covered with oil, and it also stopped the built up pressure. No smoke. After a month I decided to just run two regular catch cans (no breather) and instantly I began blowing smoke out the tail pipe. The contents in the catch can was milky. But it was heavily diluted with gas. I decided to return to using the catch can with the Breather, and I am still getting an abundance of white smoke from the tail pipe. Does anyone have any suggestions, advice, criticism, etc. I just ran blue devil, it seems to have helped a bit. But it's like I'm driving a lawnmower with a f^up carb. Below are the modifications I made. Injen CAI Zzp high flow catted downpipe Zzp larger throttle body American Thunder Axle-Back Exhaust Two catch cans Current DTC's P0420 permanent P0171 comes and goes P0131 comes and goes Attached Images