I am helping a buddy with a LS swap in a RX-7. The swapped motor is a 5.3 from an 01 Tahoe with a car intake. The motor runs really bad with MAF connected, and the fuel trims are going up to 50. The o2 sensors are staying low. If we disconnect the MAF, the car runs pretty good, the fuel trims are within 10 and the o2 sensors seem to be working normally.
Any ideas? I'm pretty new to tuning and such. Thanks