Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Engine pinging. Fuel trims and more…. › Engine pinging. Fuel trims and more…. October 11, 2019 at 5:27 am #894666 Alberto WongParticipant Thanks for replying relative4. =) Should I check the MAP sensor? This car doesn’t have a MAF sensor. Also, in my OBD scanner you can monitor the “Intake Manifold Absolute Pressure”.