I have a 2013 chevy camaro v6, 101,000 miles and a rough idle / fluctuating rpms and I've tried everything. New spark plugs, ignition coils, like 5 types of injector cleaner, new throttle body, crankshaft position sensor, cleaned k and n air filter, cleaned MAF sensor, visually checked for loose hoses in case of vacuum leak. There isn't a check engine light. I have had a engine light for evap high purge flow so I changed both the little evap canister and evap solenoid to fix it. Please help.
Do a smoke test
https://www.youtube.com/@scottykilmer/search?query=evap%20leak
https://www.youtube.com/@scottykilmer/search?query=vacuum%20leak
When you captured live data for analysis was there anything suspicious?
I mean I guess I noticed the short term fuel trim was constantly adding 3 then negative 1 and the rpms have like a 30 or so rpm fluctuation. If that helps answer your question
Maybe get a whole new MAF sensor instead of just cleaning it again?
Does the MAF sensor reading in the data look OK?
I'm not sure what's a normal reading
A quick test is at idle with a warmed-up engine you should be seeing approximately one gram per second airflow per liter of engine displacement. More comprehensive tests below:
https://www.alldata.com/sites/default/files/file-attachments/maf_sensor_testing_110918.pdf
https://www.youtube.com/watch?v=CfwTc7Im0dE
To answer your question, maf reading is at 0.01 lbs / sec which converts to 4.5 grams, I have a 3.6l v6 engine. That being said, I watched a video of someone's short term fuel trim at a steady like 4.7 but mine fluctuates between -1 to 3. Is this normal??
So i believe the MAF is working normally, do you guys think it might be the fuel injectors not spraying as they should, even though I've used many different injector cleaners?
I think, think, I found the issue doing some more research, I'm gonna clean or replace the pcv valve on the passenger side, it maybe clogged. I'll keep you guys posted