Exhaust smoke / burning oil
 

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

Turbo, Valve seals, or piston rings.

If you have a lot of blow by in the crankcase, do a compression test. Most probably the rings are shot or you have a piston/ring broken.

Hey you asked (criticism) I honestly don’t understand the mods… they’re ugly (wing and louvers) and mechanically unnecessary (catch can down pipe etc.) I have no idea how many miles you have, but I’d put the mechanical stuff back to stock and visit a dealer if you haven’t tuned it.

I said the same is this duplicate thread:
https://www.camaro6.com/forums/showthread.php?t=625227

Thanks all for all the help. Turns out so far the catch can setup was causing the smoke. I reverted back to the stock tubing and removed the "2" cans. so far so good.

I appreciate all the help and criticism.

LTG Piston/Ring History
 

I had the same problem with my stock internals, I was pushing 500hp at the crank (check my other posts for an HP Tuners log), I basically had the same setup you had, I gradually started losing power, started to smoke, so I did a pressure test and a borescope, Piston #1 looked "off" on the one side, the cylinder pressures were all over the place, Blowby got to the point to where the oil cap was jumping all over the place if I just set it over the filler hole, and losing about 1 quart of oil every 1000 miles, so I said Oh shit! there's something not right, I parked it immediately, It took me about 3 months, to pull, disassemble, replace with forged pistons and rods, and put everything back together, Long story short, (I know it's too late now), but if you push your motor, it's going to push back, just catch the problem before you score your cylinder walls, I lucked out, another week of driving with the motor like it was, I would be replacing the block. since the rebuild, I've driven 5,000 miles and have 0 oil in my catch can. Good luck bruh, these are 3 different pistons, the 4th was the same. Good luck bruh, I hope it nothing, But this will probably be your future.

Thanks for sharing those photos, which are quite disturbing.
Let's hope our OP got this all fixed up before that kind of trouble started brewing!

well, its been a couple of weeks now. since the returning of "everything" to stock it initially stopped the white smoke instantly. However, after a few days of driving it started again. (not as bad). but the cloud of smoke would now happen at start up, and especially after driving all day. I started to get a clacking sound from the turbo, and misfire on cylinder 1, turbo under boost code, lean codes, etc. I went ahead and pulled the plugs again (one week old NGK's). I noticed that cylinder 1 / 2 both had oil on them and the remaining two were charred pretty good.

I was told I blew the valve cover gasket (reason for oil on plugs) and I blew the turbo. I replaced both this weekend. New valve cover, new turbo, new plugs, coils, o2 sensors, and new MAF.

Car runs great, however I now have a code for p2227. Is there anything I'm missing? suggestions?

Thank you all

Any pending codes?
I think the pressure sensor in the pressure sensor in the MAF needs to agree with the turbo boost sensor at startup.
https://forum.hptuners.com/showthrea...wap-IAT-issues

I looked at the repair manual. It looks like there is a separate manifold absolute pressure (MAP) sensor located just behind the throttle body. held on by one bolt.

Thank you!!!! So just replace it and see what happens? I guess that can be contributing to the misfire on cylinder 1 as well. As for other codes pending, see attached.
p2227,p2096

a bad MAP reading can affect fuel delivery.
I would try a new one.
Make sure you match up the GM part number. I think these are made by Bosch, but you need one that reports the range your car is expecting.

Done, just ran to dealership and installed. code gone :thumbup: now just need to figure out the misfire on #1. probably should do a leak down test next.

thanks for the help again.

Swap coil packs and see if you get the misfire to move.
Apologies if you already tried this.

Yeah, I moved the coils around and even installed new ones. Still getting the misfire on cylinder 1. However "all" codes are completely gone pending and permanent. I truly believe cylinder 1 has issues. Either rings, or a burnt rod. No smoke out the tail pipe unless I give it about 3-4 good revs. Then it's a nice size cloud. Today on the way into work I got the low oil light again. So I'm still burning. I imagine it's just pooling in #1 and when I rev or WOT it chars it.

At this point I'm considering buying another engine off ebay. If I got to do the rings, I'm already in it to win it with just tear down alone.