Quote:
Originally Posted by kclem19
Another thing, look for wild changes in injector PW (output of fuel calc) I had cases where noise in my MAP signal was triggering map based acceleration enrichment dumping fuel!
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The graph above looks like this might be happening. The spikes in PW would lead me to believe the Acceleration Enrichment is triggering. For this initial tuning, I would recommend turning all of the AE off until these other items are confirmed.
Lastly, Tunerstudio has a separate VE table and timing table that can be used for idle. I found this incredibly useful for tuning that eliminated a lot of issues using an IAC valve, warmup transient VE issues, etc. Isolating idle parameters from active parameters was key. This also eliminates the need for scaling around the idle area.
Speaking of scaling, the load scale should be scaled to add resolution where the MAP changes are the highest - typically around 90 kpa for ITBs. Having as many rows in this area is key to smooth transient fuel/load. If you plot MAP vs TPS you can see what this means - the MAP signal changes dramatically when the butterfly cross-sectional area starts to open up.