Hey everyone.
I am having some issues trying to trouble shoot why my 2014 Challenger RT is missing/hesitation from 2000-2500rpm. Heres what I have tried so far. I have replaced the MAP sensor and intake manifold gaskets as i thought those might be the issue. They have helped some but the issue still persist. I am thinking that the issue might be injector related but I am not entirely sure since the issue happens at 2000-2500 and no where else in the RPM range. The car had a dyno tune put on in back in January of this year and it ran fine from January until I changed the spark plugs out in August. The car has 60,000 miles on it and I changed the plugs since the shop that did the tuning said they were a little dark. I initally put a set of Autolites gapped at 0.043in and they ran terrible. I then bought a set of NGKs and they were gapped at 0.043in to. I had thought I just got a bad set of plugs, which i did, and new ones would resolve the issue. The Autolites, when pulled from the motor, had various gaps and were not consistent. The problem with the miss/hesistation started subtle but has become more prominent since then. When you drive the car and hold it between 2000-2500rpm you can see the AFR spike to 16.1-16.5 and feel the miss as well. Other areas in the RPM range seem unaffected, however I have noticed the Long Term Fuel Trims seem to be all over the place. I have played with the tune file to take some spark out of the base and WOT spark tables but that did not help either. I also saw in the tune file that the shop still had the rear O2 sensors enabled, I went ahead and shut them off since the car has longtube headers on it. I am just a little lost and if anyone could help me narrow the problem down i would be greatly appreicated. In my mind a simple spark plug changed shouldnt of made the car start to run terrible and not like it had been. I will attach a log file below along with the mods done to the car.
Information: 2014 Challenger RT, 5.7 VVT HEMI, 6 speed Manual Trans
Mods: Interia Motorsports Spartan Eagle Plus Cam, Borla XR1 Longtube Headers, Borla S-Type Exhaust, Mopar CAI, 180 deg Thermostat, Ported 5.7 Manifold, AEM Wideband
In the tune file the problem can be seen from 42-55 seconds and also from 1:08-1:19 seconds.
NOTE: if driven long enough in that trouble zone CELs will apprear on the ECM. Codes P113D, P113E, and P219A have appeared in the past.
JarrettPowell_2014Challenger_9.28.2021.hpl