I haven't see a mod that increases power and caused the car to run rich. Not on a nissan. Can you give me an example? Headers, high flow cats, intakes all increase air flow. The ecu CANNOT compensate at WOT conditions. Can you explain to me how an ecu can richen the mixture on a closed loop WOT condition?
I'm not sure how you can come to the conclusion that this mod actually did anything to increase power when the dyno sheet plainly shows otherwise. They did do a tune. And the best they could to was get it back to stock power (almost  )
Not too sure where you are going with this post but you aren't make any sense from what I read
Quote:
Originally Posted by d00df00d
...Not always.
A mod that improves airflow can easily cause the engine to run rich. Depending on the mod, the increased flow without corresponding changes in IAT can cause the ECU to think it's seeing something unusual and richen the mixture to compensate.
So, on that untuned engine with the Kinetix IM, the ECU might just have been overcompensating.
As with any significant breathing mod, every car might respond differently. So, you definitely should do a tune with it.
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2003 G35 Sedan. Mods comin'
3-gen parts for sale
Sold Jan 14, 2006'
Mod list:
Eibach/Konis - ST front sway bar/Addco rear bar - Blemco rstb - Otto fstb
350Z 18" touring wheels.
Modified Cattman Y, Custom flex, 4-gen Carsound cat, Custom cat-back, Y2K muffler
Custom CAI, custom ground kit, JWT ecu, Fidanza flywheel, ACT clutch, Jeff92se Cobra 13" bbk with 300zx 30mm polished alum calipers.
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