[Gregski]

Part IX - Enable Power Enrichment aka Accelerator Pump / Secondaries

Let's take a look at some Channels that can help us gauge first if Power Enrichment is even coming on, and then how much it is effecting our Air Fuel Ratio and when.

To do this we need a minimum of three channels, so we'll start with those and then add some more for better context.

Throttle Position channel (so this is the throttle blade position on the nose of your engine, and not the actual throttle pedal, since some of us may still have drive by cable, meaning non electronic throttle pedal)

Equivalence Ratio Commanded channel (this is the adjustment that is being made to our Air Fuel Ratio, so since we are dealing with Power Enrichment it will always be the amount we are enriching) we can choose what units to show this in, either Lambda or AFR. If we choose lambda it will show the value of 1.0 until PE kicks in then it will drop below 1.0 to something like .85 to show a richer fuel mixture. In other words when we are just cruising the system says lets take our perfect AFR of 14.68 and multiply it by 1.0 and that doesn't change anything cause one times four apples is still four apples type of thing. Again the cool kids tune in Lambda but I can barely wrap my head around AFR. It doesn't matter which units you use as long as you're comparing apples to apples.

Air-Fuel Ratio Commanded channel (this is the actual final result after all the adjustments, this shows what Air Fuel Ratio we are running at this particular moment in time, if Power Enrichment never comes in then we strive for a perfect Stoich ratio of 14.68, which is a theoretical number that says 1 shot glass of pure(ish) gasoline requires approximately 14 and a half shot glasses of air to burn at it's best)