2001 Ford Explorer Sport Trac 4.0L SOHC V6 4WD
Mileage: 98,000
Symptoms: Somewhat erratic idle, low power, below average fuel economy, popping / puffing sound in the airbox, and CEL P0171 System Too Lean (Bank 1).
What I have done in order to resolve the issue:
Spark Plugs
Spark Plug Wires...