Mar 10, 2015 (4 years ago)
Connects everything from the fuel injection system to the ECU.
Focus on the AFM,
strip off all the outer covers until the individual wires/insulation is open fro the AFM to the ECU to eyeball inspection.
I usually clean off the outer insulation of each wire with Panel wipe,
Then with a very good light I EYEBALL every MM for insulation damage or telltale bright spots where the inner wire is exposed/
It really doesn't take much,
One tiny strand of inner wire can short out and screw up a sensor output signal.
The fact that unplugging the AFM to no effect tells me The ECU is still getting a signal so not using it's default settings ,
Wires are shorting across.
Same with the fuel solenoid.
Slow painstaking work.
I have taken entire wiring harness of the vehicles in the past and sat at the work bench with solvent and cloths and one of those magnifying lenses/work lamps.
REALLY GOOD LIGHT needed,
Finger sensitivity helps as well,
As stated one tiny strand can be felt as it snags your finger.
Last one I did at the bench I quit counting after 8 or so shorts!
Repaired the insulation refitted the harness and it started with no MIL,
no faults stored and none since.