3400 Swap with P0102 MAF Low Input Issue in Chrysler Corsica
I recently completed a 3400 engine swap into my Chrysler Corsica. I installed all the sensors and verified all ground connections. The car runs smoothly when idling in Park. However, as soon as I shift into Drive and apply throttle, it begins to chug and then stalls. I've confirmed that spark and fuel are present. The check engine light activates, and the fault code displayed is P0102 — indicating a low input signal from the MAF (Mass Airflow) or VAF sensor. When I disconnect the MAF sensor, the vehicle runs perfectly. As soon as I reconnect it, the car stalls again. I've also replaced the MAF sensor with a new one, but the issue persists. What other components could be causing this MAF-related problem? Are there any specific parts or wiring configurations that might interfere with MAF function in a 3400 swap setup?
For anyone performing a 3400 engine swap, be sure to avoid using the 3100 throttle body gasket on a 3400 throttle body. This can block airflow to the IAC (Idle Air Control), which disrupts proper MAF sensor operation and leads to incorrect readings or stalling when under load.