MadMaxSC400

The ECU is a real bastard sometimes on OBD-II I guess, a 40 hp difference is huge. The DynoJet 248 (which that printout is from, I recognize the text) doesn't measure at the crank, nor does it have a setting for it.

Bean

iTrader: (1)

damn i'm glad i got ODBI

As for the AFM trick... I think you gain power from it because your running LEANER... running richer makes you lose power...

ChrisK

iTrader: (1)

henrynguyen,

Can you explain to me where I can find this AFM screw?

Thanks,

henrynguyen

The Following information will help you understand how your AFM work on SC400:
The Lexus air flow meter on V8 is equipped with an electronic square wave Karman vortex device that is mounted to the air flow meters aluminum body. The air flow meters aluminum body has two separate air passage ways through it: A LARGE one that contains the Karman vortex generator sensor, and a SMALLER one that is straight through and has an adjustable flow size. THE LARGE CHAMBER In the large passage way through the aluminum body of the lexus air flow meter, filtered incoming air is measured with the TCCS Karman vortex measuring sensor mounted in the air flow meters body large chamber. THE SMALL CHAMBER on the Lexus meter has a smaller adjustable capacity passage way. The adjustable passage way allows a percentage of the fresh filtered air that is not measured by the TCCS engine control computer to go directly into the engine. The volume amount of this direct in air can be adjusted by a custom SONIC air screw located in the center of the small chamber. The adjustment screw in this chamber can be set to any position allowing the chamber to be from 100% open to 85% closed in the chambers air flow. As the filtered incoming air that passes through the SMALLER chamber does not come through the larger measuring chamber this air is an unknown portion of the total filtered induction air. Any air that passes this chamber is not known by the TCCS engine control computer because the Karman vortex sensor did not measure it. I hope you understand how to use the air flow meter on your SC400.

Good luck

ChrisK

iTrader: (1)

henrynguyen,

Let me rephrase my question. Do I have to take the Karman vortex device out to get to the Sonic air screw to adjust it? Is it accessible from the outside of the AFM? Where exactly is it?