Hey folks,
I'm new to learning this stuff and trying to figure out what is going on with my Supercharged Jeep JK with the 3.8 in it. It seems like the PCM is trying to remove fuel even when it is lean. Not sure why, seems to be opposite of everything I have been reading up on. I added a wideband so I could see the exact numbers and was able to add it as a PID in the CAN BUS system so I could log it. I was able to check that the wideband and the narrowband O2 sensors are agreeing with each other around a 14.7 stoich. I work in cyber security with a background in forensics and hacking so I was able to figure out enough to get things logged and understand basic fueling concepts but that is about where I am at now. Any help is much appreciated.
Hardware:
- RIPP kit with high altitude pulley
- 180 degree thermostat
- plugs gapped to .30, NGK 4306
- fuel pump pressure is holding between 56-58 for this logging session (I have another standalone gauge for that but I watch it while I am driving)
- compression and leakdown numbers are in excellent shape
- injectors are Bosch 0280156127 (recently flow tested and they are literally in perfect condition and perfectly matched)
- MAP sensor is a Mopar 05033224AB (came with the kit)
Here is what I am seeing and I am attaching the logs and tune file:
Fuel Trim and AFR graph.png