Any suggestions on what's wrong anyone?Ive got a 2013 Dart Rallye with a 2.0 engine and Auto Tranny. Owned it two years, has 111k as of today and recently I've decided to give it some pep as its its got the slowest pick up ever. Below is a time table of my additions. Recently when I accelerate no mater the speed I'm currently at 30, 40, 65, 75 if I go to press the accelerator too fast the car chokes as if its not getting air and the ETC (lightning symbol) flashes until I depress the pedal slightly then it picks up. Also If I accelerate gradually no problems. Any ideas what's going on.
02/20 - Ingen CAI - no issues
06/21 - Sprint pedal booster - no issues and pickup was way better made car fun to drive.
07/30/21 - MPX Header - Car picked up even better not 100% sure but tranny felt like it responded better as well.
08/05/21 - o2 sensor - P0420 gave me a check engine light figured I damaged sensor when removing from OEM header and placing on new MPX one. code cleared after a day of driving ran great.
08/06/21 - NGK Iridium plugs - didn't feel any difference - Coil packs replaced @100k - No Issues
08/09/21 - 2x Flowmaster Resonators - car sounded like a damn scooter on drugs when going from 0-40 after that it sounded good and didn't drone Modern performance recommended I add the resonator to reduce the volume.
08/15/21 - Issue started happening and also code P0420 came back no other codes.
08/17/21 replaced same O2 sensor again as the code was exactly the same and same location. waiting to see if code clears but the choking is still happening.