Platform is 2012 cruze 1.4 manual. I have a hot dynotune on it and its been perfect for about 6 months until now. My idle is super rich and has a rich missfire if i hold rpms below 1500. Driving is perfectly normal. The ltft like to hang around -3 to +3 while driving normal or under hard pulls. Just idle is giving me a issue. Injectors are stock 26lbs. I have 60 lbs injectors i plan on swapping in to eliminate a leaky injector. "Yes the 60's have been dyno tuned too" i originally i swapped back to stock injectors for mpg while commuting. The stock are just about static on pulls past 5k rpm. So heres what i tried. Cleaned maf, went back to stock intake "best maf placement", new front o2 sensor, no exhaust leaks, no boost/vacuum leaks, plugs good, coil good. Im mechanically inclined i just have basic tools atm. My guess is do my injector swap then look at maf for issues. Thoughts?