Cold Start Tune

[Ralle#67]

I want to tune my cold start.
Should I try im Crank Fuel Volume Compensation,
and to achieve Post Start Fuel Volume Compensation Lambda Aim
or rather a richer mixture?
Best regards
Ralf

[NathanB]

Crank Volume compensation is the additional fuel to be injected during cranking (engine state = cranking, engine speed below run threshold)

Post start fuel volume compensation (Active during the initial engine run time from exceeding the engine run threshold)

Depending on what your trying to achieve, you will need to adjust either or both.

[Stephen Dean]

Also, with Post Start Compensation, make sure that the last column in the table has 0.0 values, if there is still a trim in place when the post start table times out, that trim will remain in place until the engine is next started and stop the closed loop lambda control from functioning.

[Ralle#67]

The engine starts and stops immediately.
Therefore I wanted an orientation whether I have to set the mixture richer or leaner.
I saw in the M1 example package that there in the "post Start
Compensation" gives a Quick Lambda function.
Unfortunately my package doesn't have that.

[Stephen Dean]

Usually this means that the engine is lean, add some more fuel (use the overall trim function) to get it to start and idle, then tune the fuelling.

[NathanB]

As you are using a MoTeC Europe Bike package, there is also a chance you have lowered your idle throttle position too far at cold temperatures, causing insufficient air into the motor when cold.

[Ralle#67]

The engine is running. Many thanks for your help.
Best regards
Ralph