the ground wires on the plenum could be loose.
coolant temp sensor.
a wire end can become loose in the plug and not make contact.
debris lodged in the AFM.
use this info to test the AFM
Between terminals E1 and FC
measuring plate fully closed infinity
measuring plate other than closed zero
Between terminals VC and E2
always 200 - 400 ohms
Between terminals THA and E2
at -20C (-4F) 10 - 20 k ohms
at 0C (32F) 4 - 7 k ohms
at 20C (68F) 2 - 3 k ohms
at 40C (104F) 0.9 - 1.3 k ohms
at 60C (104F) 0.4 - 0.7 k ohms
Between terminals VS and E2
measuring plate fully closed 200 - 600 ohms
measuring plate fully open 20 - 1200 ohms
NOTE: Resistance between terminals E2 and VS will change in a wave pattern as the measuring plate slowly opens.
check the ohms in the injectors.
13.4 - 14.2 Ohms
check the wires, harness and connectors. make sure they are not damaged, burned, or eatin by a mouse.