Sorry, Fred, leaving you without answers. I was quite busy at work and I try to answer them later in details.
OK. Now I bought AutoEnginuity tool with Honda extension.
This is pretty good tool compare to what I had before.
I took a few logs already and have a bunch of questions but struggle to ask them now cause of lack of free time.
I confirmed with this tool that this sudden spikes are not tracking accelerator pedal.
I uploaded a log file
here to prove it.
Now the question is does it really a throttle plate movement or not I don't know yet.
Is any parameter in ECU available to reflect throttle motor operation?
Here is a list of available (thru AE) parameters for my car:
2-Way Bypass Valve Solenoid Circuit (Bit) [0 - 1],
ABS Warning Lamp Control Line (Bit) [0 - 1],
Absolute Throttle Position (%) [0 - 100],
AC Clutch Switch (Bit) [0 - 1],
AC Generator Control Request (Bit) [0 - 1],
AC Pressure Switch (Bit) [0 - 1],
AC Refrigerant Pressure (inHg) [0.0 - 19350.8],
AC Refrigerant Pressure - Volts (V) [0.00 - 5.00],
AC Refrigerant Pressure Received from AC Module thru F-CAN (inHg) [0.0 - 19350.8],
AC Temperature Dial Signal - Volts (V) [0.00 - 5.00],
Accelerator Pedal Position (%) [0.000 - 327.675],
Accelerator Pedal Position 1 (%) [0.000 - 327.675],
Accelerator Pedal Position 1 - Volts (V) [0.00 - 5.00],
Accelerator Pedal Position 2 (%) [0.000 - 327.675],
Accelerator Pedal Position 2 - Volts (V) [0.00 - 5.00],
Accelerator Pedal Position Sensor Input - Driver Requested Torque (Nm) [-655.36 - 655.34],
ACGL Terminal (Bit) [0 - 1],
ACM Module - Volts (V) [0.00 - 3276.75],
ACM Solenoid - Volts (V) [0.00 - 3276.75],
ACM Solenoid Power Supply Relay (Bit) [0 - 1],
Actual Current Oil Pressure Control Solenoid On VTC System (Deg) [-20.0 - 107.5],
Actual RPM Of Hybrid AC Compressor Reported (RPM) [0 - 9000],
Air Assist Solenoid (Bit) [0 - 1],
Air Conditioner Clutch (Bit) [0 - 1],
Air Conditioner Evaporator Temperature (F) [-40 - 419],
Air Conditioner Evaporator Temperature Output Voltage (V) [0.00 - 5.00],
Air Conditioner Switch Input (Bit) [0 - 1],
Air Pump Motor Relay For Secondary Air Injection System (Bit) [0 - 1],
Air Pump Motor Terminal For Secondary Air Injection System (Bit) [0 - 1],
All Injector Deactivation Mode (Bit) [0 - 1],
AT 'D' Position Switch (Bit) [0 - 1],
AT Neutral-Parking Switch (Bit) [0 - 1],
AT-CVT Reverse Position Switch Input Status (Bit) [0 - 1],
Average Of Fuel Level From Fuel Level Sensor (%) [0.0 - 6553.5],
Barometric Air Pressure (inHg) [0.0 - 75.3],
Barometric Air Pressure - Volts (V) [0.00 - 5.00],
Battery Voltage (V) [0.00 - 25.50],
Block Learn For IG Timing Collection For Knocking Control (HEX) [0 - 128],
Block Learn For IG Timing Collection For Knocking Control EGR Condition (HEX) [0 - 128],
Brake Booster Pressure (inHg) [0.0 - 258.0],
Brake Booster Pressure - Volts (V) [0.00 - 5.00],
Brake Fluid Pressure 1 (PSI) [-355.58313 - 529.90247],
Brake Fluid Pressure 1 - Volts (V) [0.00 - 5.00],
Brake Fluid Pressure 2 (PSI) [-355.58313 - 529.90247],
Brake Fluid Pressure 2 - Volts (V) [0.00 - 5.00],
Brake Switch (Bit) [0 - 1],
Brake Switch Input Status For Cruise Control System (Bit) [0 - 1],
Bypass Valve Control Solenoid (Bit) [0 - 1],
Calculated Ambient Air Temperature (F) [-40 - 419],
Calculated Load Value (%) [0 - 100],
CAM Pulse Disappearance Counter (Count) [0 - 255],
CAM Pulse Noise Counter (Count) [0 - 255],
Check Engine Light (Bit) [0 - 1],
Circuit DIAG Signal' For The Vent Shut Solenoid Circuit Monitoring (Bit) [0 - 1],
CKP Sensor Notch Learn Process Status - Any Other System Condition (Bit) [0 - 1],
CKP Sensor Notch Learn Process Status - Engine Coolant Temperature Condition (Bit) [0 - 1],
CKP Sensor Notch Learn Process Status - LEMFPGO (Bit) [0 - 1],
CKP Sensor Notch Learn Process Status - Shift Position Selector Position (Bit) [0 - 1],
Closed Throttle Position Switch (Bit) [0 - 1],
Controlled Intake Camshaft Advance Angle Of VTC System (Deg) [-20.0 - 107.5],
Cooling Fan High Relay (Bit) [0 - 1],
Cooling Fan Low Relay (Bit) [0 - 1],
Cooling Fan Relay (Bit) [0 - 1],
Crank 1 Sensor Noise Counter (Count) [0 - 255],
Crank 1 Sensor Pulse Disappearance Counter (Count) [0 - 255],
Crank 2 Sensor Noise Counter (Count) [0 - 255],
Crank 2 Sensor Pulse Disappearance Counter (Count) [0 - 255],
Crank Pulse Disappearance Counter (Count) [0 - 255],
Crank Pulse Noise Counter (Count) [0 - 255],
Crankshaft Position Notch Learning Processing Status (Bit) [0 - 1],
Crankshaft Position Notch Learning Status (Bit) [0 - 1],
Crankshaft Position Notch Variation Learning Processing Status (Bit) [0 - 1],
Crankshaft Position Notch Variation Learning Status (Bit) [0 - 1],
Criteria A Misfire Counter - Amount (Count) [0 - 65535],
Criteria A Misfire Counter - Cylinder #1 (Count) [0 - 65535],
Criteria A Misfire Counter - Cylinder #2 (Count) [0 - 65535],
Criteria A Misfire Counter - Cylinder #3 (Count) [0 - 65535],
Criteria A Misfire Counter - Cylinder #4 (Count) [0 - 65535],
Criteria A Misfire Counter - Cylinder #5 (Count) [0 - 65535],
Criteria A Misfire Counter - Cylinder #6 (Count) [0 - 65535],
Criteria B Misfire Counter - Amount (Count) [0 - 65535],
Criteria B Misfire Counter - Cylinder #1 (Count) [0 - 65535],
Criteria B Misfire Counter - Cylinder #2 (Count) [0 - 65535],
Criteria B Misfire Counter - Cylinder #3 (Count) [0 - 65535],
Criteria B Misfire Counter - Cylinder #4 (Count) [0 - 65535],
Criteria B Misfire Counter - Cylinder #5 (Count) [0 - 65535],
Criteria B Misfire Counter - Cylinder #6 (Count) [0 - 65535],
Cruise Control Pilot Lamp Testing Mode (Bit) [0 - 1],
Cruise Control System Calculation Request Input from AT Shift Selector (Bit) [0 - 1],
Cruise Control System Calculation Request Input from MT Gear Lever (Bit) [0 - 1],
Cruise Control System CANCEL Switch Input (Bit) [0 - 1],
Cruise Control System Main Switch Input (Bit) [0 - 1],
Cruise Control System RESUME Switch Input (Bit) [0 - 1],
Cruise Control System SET Switch Input (Bit) [0 - 1],
Cruise Control Torque (Nm) [-655.36 - 655.34],
Current Of Front Side ACM Solenoid (Amp) [0.00 - 655.35],
Current Of Rear Side ACM Solenoid (Amp) [0.00 - 655.35],
Cylinder Deactivation Solenoid (Bit) [0 - 1],
Cylinder Deactivation Solenoid (Bit) [0 - 1],
Cylinder Pulse Disappearance Counter (Count) [0 - 255],
Cylinder Pulse Noise Counter (Count) [0 - 255],
Cylinder Sensor Noise Counter With Crank 1 Sensor (Count) [0 - 255],
Cylinder Sensor Noise Counter With Crank 1 Sensor 2 (Count) [0 - 255],
Cylinder Sensor Pulse Disappearance Counter (Count) [0 - 255],
DBW Module Inhibitor Relay (Bit) [0 - 1],
DBW Throttle Motor Control Halted (Bit) [0 - 1],
Deceleration Fuel Cut Condition (Bit) [0 - 1],
Distance Travelled While MIL is Activated (Mile) [0 - 40717],
Econo Lamp (Bit) [0 - 1],
EGR Valve Lift - Volts (V) [0.00 - 5.00],
Electric Load Signal Line From the EPS ECU (Bit) [0 - 1],
Electric Power Measured at The IMA Battery Terminal (W) [-32767 - 32768],
Engine Coolant Temperature (F) [-40 - 419],
Engine Coolant Temperature - Volts (V) [0.00 - 5.00],
Engine Coolant Temperature 2 (F) [-40 - 419],
Engine Coolant Temperature 2 - Volts (V) [0.00 - 5.00],
Engine Coolant Temperature 2 For Radiator Fan Control (F) [-40 - 419],
Engine Coolant Temperature 2 For Radiator Fan Control - Volts (V) [0.00 - 5.00],
Engine Idling Mode Control (Bit) [0 - 1],
Engine Oil Pressure (inHg) [0.0 - 19350.8],
Engine Oil Pressure - Volts (V) [0.00 - 5.00],
Engine Ready Status (Bit) [0 - 1],
Engine Run Time (Sec) [0 - 65535],
Engine Speed (RPM) [0 - 9000],
Engine Torque - Air Flow Sensor (Nm) [-655.36 - 655.34],
Equivalence Ratio Bank 1 (Ratio) [0.000 - 1.999],
Equivalence Ratio Bank 2 (Ratio) [0.000 - 1.999],
Fast Idle Valve Control Solenoid (Bit) [0 - 1],
FPC Relay (Bit) [0 - 1],
Fuel Cut Condition (Bit) [0 - 1],
Fuel Pump Relay (Bit) [0 - 1],
Fuel Pump Relay 2 (Bit) [0 - 1],
Fuel System Status Bank 1 (State) [0 - 255],
Fuel System Status Bank 2 (State) [0 - 255],
Fuel Tank Pressure - Volts (V) [0.00 - 5.00],
HO2S Bank 1 Sensor 2 - Commanded (Bit) [0 - 1],
HO2S Bank 1 Sensor 2 - Current (mA) [0 - 655350],
HO2S Bank 1 Sensor 2 - Volts (V) [0.00 - 5.00],
HO2S Bank 2 Sensor 2 - Commanded (Bit) [0 - 1],
HO2S Bank 2 Sensor 2 - Current (mA) [0 - 655350],
HO2S Bank 2 Sensor 2 - Volts (V) [0.00 - 5.00],
Hybrid AC Compressor Motor (Bit) [0 - 1],
Idle Air Volume Learning Status - IALSTAT2 (Bit) [0 - 1],
Idle Air Volume Learning Status - Learning ProcessIALSTAT0 (Bit) [0 - 1],
Idle Air Volume Learning Status - Parameter IALSTAT0-2 (Bit) [0 - 1],
Idle-Up Solenoid (Bit) [0 - 1],
Idling Throttle Position Block Learn Condition (Bit) [0 - 1],
IG1 Terminal Of ECU (Bit) [0 - 1],
IMA Battery State Of Charge (%) [0.00 - 655.35],
IMA Battery Temperature Reported (F) [-40 - 419],
IMA Motor Actual Output Torque from Motor-Battery (Nm) [-655.36 - 655.34],
IMA Motor Torque Output Command To IMA System (Nm) [-655.36 - 655.34],
Indicates Within Quick MIL ON Mode (Bit) [0 - 1],
Injector #1 On Duration (ms) [0.0 - 262.1],
Intake Air Temperature (F) [-40 - 419],
Intake Air Temperature (F) [-40 - 419],
Intake Air Temperature - Volts (V) [0.00 - 5.00],
Intake Air Temperature - Volts (V) [0.00 - 5.00],
Intake Control Solenoid (Bit) [0 - 1],
Intake Manifold Tuning Valve (Bit) [0 - 1],
Intake Manifold Tuning Valve Position Sensor - Volts (V) [0.00 - 5.00],
Intake Manifold Tuning Valve Position Switch (Bit) [0 - 1],
Knock Sensor System Sensor Input (HEX) [0 - 255],
Learning Status Of Hi-NE Crankshaft Position Notch Variation Learning Status (Bit) [0 - 1],
Long Term Fuel Trim Bank 1 (%) [-100.00 - 100.00],
Long Term Fuel Trim Bank 2 (%) [-100.00 - 100.00],
Manifold Air Pressure (inHg) [0.0 - 75.3],
Manifold Air Pressure - Volts (V) [0.00 - 5.00],