MAF Diagnostics for your volvo can help with troubleshooting. Troubling load percentages are in brown and they seem to be all over the place too… dropping off strongly from 53% to 43% in the frame immediately before the MAF and Throttle position spike, and then jumping to 63% in the frame after the MAF/Throttle spike, and peaking at 67% a frame later.
Calculated Load Value(%)53.7
Short Term Fuel Trim -Bank 1(%)-2.3
Long Term Fuel Trim – Bank 1(%)-1.6
Intake Manifold Absolute Pressure(kPa)58.0
Engine RPM(rpm) 2184
Vehicle Speed Sensor (km/h)99
Ignition Timing Advance for #1 Cylinder(¡£)33.0
Air Flow Rate from Mass Air Flow Sensor(g/s)21.69
Absolute Throttle Position(%)25.5
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.485
Short Term Fuel Trim Bank 1-Sensor 1(%)-3.1
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.730
Short Term Fuel Trim Bank 1-Sensor 2(%)-0.8
———————-
Calculated Load Value(%)51.4
Short Term Fuel Trim -Bank 1(%)-5.5
Long Term Fuel Trim – Bank 1(%)-2.3
Intake Manifold Absolute Pressure(kPa)73.0
Engine RPM(rpm) 2184
Vehicle Speed Sensor(km/h)99
Ignition Timing Advance for #1 Cylinder(¡£)37.5
Air Flow Rate from Mass Air Flow Sensor(g/s)18.42
Absolute Throttle Position(%)19.2
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.485
Short Term Fuel Trim Bank 1-Sensor 1(%)-7.0
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.765
Short Term Fuel Trim Bank 1-Sensor 2(%)-0.8
———————-
Calculated Load Value(%)53.3
Short Term Fuel Trim -Bank 1(%)-9.4
Long Term Fuel Trim – Bank 1(%)-2.3
Intake Manifold Absolute Pressure(kPa)55.0
Engine RPM(rpm) 2151
Vehicle Speed Sensor(km/h)98
Ignition Timing Advance for #1 Cylinder(¡£)34.0
Air Flow Rate from Mass Air Flow Sensor(g/s)19.32
Absolute Throttle Position(%)27.5
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.470
Short Term Fuel Trim Bank 1-Sensor 1(%)-8.6
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.230
Short Term Fuel Trim Bank 1-Sensor 2(%)-0.8
———————-
Calculated Load Value(%)43.5
Short Term Fuel Trim -Bank 1(%)-5.5
Long Term Fuel Trim – Bank 1(%)-1.6
Intake Manifold Absolute Pressure(kPa)52.0
Engine RPM(rpm) 2141
Vehicle Speed Sensor(km/h)97
Ignition Timing Advance for #1 Cylinder(¡£)34.0
Air Flow Rate from Mass Air Flow Sensor(g/s)18.00
Absolute Throttle Position(%)25.1
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.405
Short Term Fuel Trim Bank 1-Sensor 1(%)-7.0
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.125
Short Term Fuel Trim Bank 1-Sensor 2(%)-0.8
———————-
Calculated Load Value(%)52.9
Short Term Fuel Trim -Bank 1(%)-6.3
Long Term Fuel Trim – Bank 1(%)-1.6
Intake Manifold Absolute Pressure(kPa)55.0
Engine RPM(rpm) 2144
Vehicle Speed Sensor(km/h)97
Ignition Timing Advance for #1 Cylinder(¡£)33.0
Air Flow Rate from Mass Air Flow Sensor(g/s)31.93
Absolute Throttle Position(%)38.4
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.495
Short Term Fuel Trim Bank 1-Sensor 1(%)-6.3
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.135
Short Term Fuel Trim Bank 1-Sensor 2(%)-0.8
———————-
Calculated Load Value(%)63.9
Engine Coolant Temperature(¡£C)92
Short Term Fuel Trim -Bank 1(%)-8.6
Long Term Fuel Trim – Bank 1(%)-2.3
Intake Manifold Absolute Pressure(kPa)60.0
Engine RPM(rpm) 2129
Vehicle Speed Sensor(km/h)96
Ignition Timing Advance for #1 Cylinder(¡£)32.5
Air Flow Rate from Mass Air Flow Sensor(g/s)21.47
Absolute Throttle Position(%)17.6
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.470
Short Term Fuel Trim Bank 1-Sensor 1(%)-7.8
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.155
Short Term Fuel Trim Bank 1-Sensor 2(%)-1.6
———————-
Calculated Load Value(%)67.1
Short Term Fuel Trim -Bank 1(%)-3.9
Long Term Fuel Trim – Bank 1(%)-2.3
Intake Manifold Absolute Pressure(kPa)70.0
Engine RPM(rpm) 2119
Vehicle Speed Sensor(km/h)96
Ignition Timing Advance for #1 Cylinder(¡£)26.5
Air Flow Rate from Mass Air Flow Sensor(g/s)27.34
Absolute Throttle Position(%)31.8
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.480
Short Term Fuel Trim Bank 1-Sensor 1(%)0.0
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.680
Short Term Fuel Trim Bank 1-Sensor 2(%)-0.8
———————-
Calculated Load Value(%)65.5
Engine Coolant Temperature(¡£C)92
Short Term Fuel Trim -Bank 1(%)0.0
Long Term Fuel Trim – Bank 1(%)-2.3
Intake Manifold Absolute Pressure(kPa)72.0
Engine RPM(rpm) 2133
Vehicle Speed Sensor(km/h)96
Ignition Timing Advance for #1 Cylinder(¡£)27.0
Air Flow Rate from Mass Air Flow Sensor(g/s)27.65
Absolute Throttle Position(%)32.2
Oxygen Sensor Output Voltage Bank 1-Sensor 1(V)0.485
Short Term Fuel Trim Bank 1-Sensor 1(%)-0.8
Oxygen Sensor Output Voltage Bank 1-Sensor 2(V)0.655
Short Term Fuel Trim Bank 1-Sensor 2(%)-0.8
