Quote:
Originally Posted by mad_sb
Yes, this is the cat light off strategy, retarded timing (and probably late injection) heats the cat more quickly. Messing with the target idle in this area or the after start ignition timing is likely to cause a CEL.
In the past i tried setting the after start timing to 0 rather than -10, but that resulted in large cold start idle speed target errors, a higher cold start idle speed, and a longer wait time before it exits the cold start loop. It did reduce the volume level a little bit though.
Either not all the cold start logic tables are defined yet, or the cold start logic is not exposed to table inputs.
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I experimented again by just setting that timing retard after start to -5 from -15.
I got a higher cold idle, CEL and P050B code. But it is still much quieter
I'll try it again with something in between