Just for reference, I have a 97’ with the 2.5l. I recently got a P0121 and P0123 DTC. Some symptoms that I have noticed that could point to my TPS is at once I let off my throttle my idle drops to about 200-300 RPM and oil pressure drops to 23-25psi. The oil pressure makes sense because the pump is barely moving anything at that low of an RPM. When idle drops it occasionally levels out at about 700rpm when coming to a complete stop (this is only an issue in stop and go traffic).
I tried everything that I can think of I backprobed the wires in here are my findings. Attached is my wiring diagram and I will be referencing the wire colors and tracer colors just for simplicity.
K7 200R is my 5v (Solid Orange)
K167 20 BR/YL is sensor Ground
K22 180 R/DB is my Signal wire (I’m not sure where the Red comes from but it’s Orange with a Blue Tracer)
Some confusion that may arise may be because my wires aren’t the same color as the Manual states….
All testing was done KOEO (Key On Engine Off) with ground directly to the battery backprobing with the TPS connector attached and DC V on my multimeter.
K7 which is supposed to be my 5V constant is resting at 0.768v and steadily increases to just under 4v at WOT
K167 which should be my ground is a 5.13v Constant
K22 which should be my signal wire is 10.4mV
Wtf is going on???? Maybe someone rewired my connector to be messed up but that wouldn’t explain the engine running perfectly fine 80% of the time and only having intermittent issues. I can wiggle the connector and TPS % fluctuates on my OBD2 scanner.
TPS% (Absolute Throttle Position) moves around from 23.5 to 23.9 to 24.3 approximately every 3 seconds with no throttle applied and eventually drops to 15.0-19.0 after applying throttle and fully releasing my foot.
Intake Manifold Absolute Pressure (the only map spec I can monitor) is steady at 9 (inHG)
TPS WOT sweep maxes out at 79.6 % on my scan tool and at WOT it fluctuates between 78.0, 78.4, 78.8, 79.6 but it usually maintains at 78.0% at WOT KOEO. It steadily increases in voltage when I use my multimeter to monitor.
I can’t monitor the throttle plate while fully pressing down the petal, but I zip tied my petal so it’s at WOT and the throttle plate is fully opened, my thought was maybe slack in the DBC wires. After that test and the Jeep sitting at KOEO for about 10 minutes. The TPS percentage has dropped to a steady 15.3.
I’m so scattered brained right now and I've been on this for like 4 hours so if anyone has knowledge that may help I’d appreciate it!
I tried everything that I can think of I backprobed the wires in here are my findings. Attached is my wiring diagram and I will be referencing the wire colors and tracer colors just for simplicity.
K7 200R is my 5v (Solid Orange)
K167 20 BR/YL is sensor Ground
K22 180 R/DB is my Signal wire (I’m not sure where the Red comes from but it’s Orange with a Blue Tracer)
Some confusion that may arise may be because my wires aren’t the same color as the Manual states….
All testing was done KOEO (Key On Engine Off) with ground directly to the battery backprobing with the TPS connector attached and DC V on my multimeter.
K7 which is supposed to be my 5V constant is resting at 0.768v and steadily increases to just under 4v at WOT
K167 which should be my ground is a 5.13v Constant
K22 which should be my signal wire is 10.4mV
Wtf is going on???? Maybe someone rewired my connector to be messed up but that wouldn’t explain the engine running perfectly fine 80% of the time and only having intermittent issues. I can wiggle the connector and TPS % fluctuates on my OBD2 scanner.
TPS% (Absolute Throttle Position) moves around from 23.5 to 23.9 to 24.3 approximately every 3 seconds with no throttle applied and eventually drops to 15.0-19.0 after applying throttle and fully releasing my foot.
Intake Manifold Absolute Pressure (the only map spec I can monitor) is steady at 9 (inHG)
TPS WOT sweep maxes out at 79.6 % on my scan tool and at WOT it fluctuates between 78.0, 78.4, 78.8, 79.6 but it usually maintains at 78.0% at WOT KOEO. It steadily increases in voltage when I use my multimeter to monitor.
I can’t monitor the throttle plate while fully pressing down the petal, but I zip tied my petal so it’s at WOT and the throttle plate is fully opened, my thought was maybe slack in the DBC wires. After that test and the Jeep sitting at KOEO for about 10 minutes. The TPS percentage has dropped to a steady 15.3.
I’m so scattered brained right now and I've been on this for like 4 hours so if anyone has knowledge that may help I’d appreciate it!
