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Christ · 07-12-2009, 11:36 AM

I don't think it's a ram air effect so much as a computer compensation.

I think what happens is that the VSS tells the ECU that the car is moving, but the engine is not under load, so the ECU opens the IACV to help compensate for where the engine should be, in case it gets a sudden load.

I could be spitting canal water, here, but that's what I've always thought was happening, cuz it never happened on any of my carbies.

07-12-2009, 11:36 AM	#3 (permalink)
Christ Moderate your Moderation. Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts	I don't think it's a ram air effect so much as a computer compensation. I think what happens is that the VSS tells the ECU that the car is moving, but the engine is not under load, so the ECU opens the IACV to help compensate for where the engine should be, in case it gets a sudden load. I could be spitting canal water, here, but that's what I've always thought was happening, cuz it never happened on any of my carbies. __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"