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nickw14 · 03-22-2015, 04:11 AM

So I just got my OFT today and have been experimenting with some maps. I have been testing out VVT cam angles at idle and I keep running into this really weird situation. I will try to explain the best I can, so bear with me

At idle (0% throttle and ~.20 engine load) I have changed the vvt cam angle (both intake and exhaust). However, when I flash the tune and the car enters closed loop, I see NOTHING happen. The only time my values are ever actually used is when I press the throttle ever so slightly (not even enough to bump the value up 1%, but the rpm's do go up by less than 100).

Is there some value that basically limits vvt at absolute 0% throttle? I have searched up and down all these values and can't find anything relating to that.

Thanks for any help you all may provide!

EDIT:
http://forums.nasioc.com/forums/show....php?t=2573995 This thread provides some insight. It appears as though one of two things could be happening here:

1) AVCS is not active because the oil pressure drops once the engine enters closed loop. Since the threshold is (apparently) a higher value than what the pressure is at idle, AVCS will not do anything unless the throttle is depressed even slightly.

2) AVCS is not active because of a neutral switch (I assume both park and neutral are considered the same thing).

03-22-2015, 04:11 AM	#1
nickw14 Senior Member Join Date: May 2014 Drives: Built FA20 Location: Toledo, OH Posts: 125 Thanks: 28 Thanked 50 Times in 21 Posts Mentioned: 0 Post(s)	VVT Angle and throttle % (OFT) So I just got my OFT today and have been experimenting with some maps. I have been testing out VVT cam angles at idle and I keep running into this really weird situation. I will try to explain the best I can, so bear with me At idle (0% throttle and ~.20 engine load) I have changed the vvt cam angle (both intake and exhaust). However, when I flash the tune and the car enters closed loop, I see NOTHING happen. The only time my values are ever actually used is when I press the throttle ever so slightly (not even enough to bump the value up 1%, but the rpm's do go up by less than 100). Is there some value that basically limits vvt at absolute 0% throttle? I have searched up and down all these values and can't find anything relating to that. Thanks for any help you all may provide! EDIT: http://forums.nasioc.com/forums/show....php?t=2573995 This thread provides some insight. It appears as though one of two things could be happening here: 1) AVCS is not active because the oil pressure drops once the engine enters closed loop. Since the threshold is (apparently) a higher value than what the pressure is at idle, AVCS will not do anything unless the throttle is depressed even slightly. 2) AVCS is not active because of a neutral switch (I assume both park and neutral are considered the same thing). Last edited by nickw14; 03-22-2015 at 03:07 PM.