Hondata

Hi Hondata,

the engine does not run as expected in cold conditions so I am currently investigate. No check engine code is logged or other trouble codes...
Currently it looks like that my Hondata-4-Bar-MAP sensor is going bad.

In different cases the RPM and Tplate going down but the MAP readings going high.
So the ECU determine to inject more fuel because the MAP is going high... S-Trim shows also a rich condition (-xx state).
In this case the engine going to stall - thats clear...

The strange thing is, if the engine is warmed up, all works fine.

Can you confirm this?

Log (including comments) attached.
Calibration attached.
graph template attached.

In advance thanks for help.

The MAP value in the datalog looks normal. The fuel trims are very high, which indicates a tuning problem.
I'd suggest testing the sensor by switching the ignition on but not starting the engine. You should see around 100 kPa, depending on elevation.

Hi Hondata,

thanks for your reply. I will check this. Thanks for your input.

Yeah looks good.
The characteristic of the vaporizing from the DW800 injectors in cold conditions. I must add more advance in the ignition coolant temperature compensation section. Now the engine runs fine.

ECT (°C) -30 0 10 30 45
Advance (°) 7,5 5,0 4,0 2,0 0,0