Intake Air Temperature Sensor
Using Bosch air temp sensor, part number 0 280 130 085. Sensor comes from a VW 1.8t 20 valve, small port head.
Values in EasyTherm are:
50F=4800ohm
82F=1900ohm
208F=230ohm
Still have to test these values to be certain but thats what I have now. I believe these are +/-2F of actual temp.
Note about Megatune: When tuning sensors it is not necessary to recompile and upload firmware each time. Simply update the .inc files in the Megatune directory and watch values change in Megatune. Recompile and upload firmware when values are correct.
WBO2 Setup:
All wiring is correct, I have double checked. wbo2_pump_pw (0x63) is calibrated correctly, voltage is -0.03V. Measured Rcal at 127 ohms, so wbo2_calibration is set to 0xB0. Attached sensor to do free air calibration, command mde02, sensor heat comes up to maximum (0xE4) and O2% appears on LCD mlp07. As soon as heat is maxed, drops to 0x00, pauses then comes up to a reasonable level gradually. As soon as O2% appears on screen, value changes VERY rapidly from 20.9x% to 11.xx% to 17.xx% to 19.xx%, in no particular order. Ri stays between 0x90 and 0xAD. Any ideas what is going on here? All of this is without engine running.
More info:
Did some testing last night with 100ohm resistor method. Nernst was at 3.96V at first (nernst_dc_target=8D), raised it gradually to 0xBD to get to 4.47V. (I suspect that integral was too low, not enough to push PID error down to zero)
Intermediate nernst_dc_target values resulted in wavering (by about 0.2V, instead of the max 0.1V allowed maximum) Nernst voltage. When nernst_dc_target was raised to 0xBD, Nernst voltage was dead steady at 4.47v (maybe pump was railed at max FF?).
WBO2 testing page says I need 3.96V+0.45V=4.41V sortof steady, so lowered nernst_dc_target to 0xB7, but voltage started to waver again. With values where Nernst voltage wavers, pump value (on mlp07 of LCD) is a value such as 0xC3, jumps to FF briefly, then back down to 0xC3 (0xC3 is just an arbitrary number. actual value is above 0xC0, but I don't remember what it was).
When measuring nernst and pump-, I have varying values. I think the values i measured were bouncing between 120mv and 150mv. They are written down at home, I will post later.
I changed wbo2_pump_pidki from 0x40 to 0x20, but didn't see a difference in voltage values. Should this affect the bouncing of voltage up and down when measuring nernst (to ground) voltage and nernst to pump- voltage?
yes, it sounds like a WBO2 PID configuration issue (oscillation), because your WBO2 pump (HW) seems to react. Play with the values, especially pump_pid....
eg. try this:
- wbo2_pump_pid_kp=30
- wbo2_pump_pid_ki=80
- wbo2_pump_pid_kd=00
- wbo2_pump_pid_ilimit=80
Above suggested settings work well so far. Only had to adjust the wbo2_calibration and bring nernst_dc_target back down to reasonable values.
RPM reading issue (VR Sensor)
Ignition is controlled by ... K-Jet
Injection is contolled by ... VW solid state ignition module + K-Jet knock box
Made a log of rpm, it reads 3000-4000 rpm at idle, which is really 900-1000 rpm. RPM drops to ~600 for two to three samples, then back up to 3-4k.
- another_trigger_tooth=12 (decimal 18) is correct for a 36-1 tooth (tooth_wheel=23) and 4-cylinder
These settings worked for me.