VVT offline

[solidsnake11]

C

[steve99]

Originally Posted by solidsnake11

So It seems my VVT is off after a flash causing a no midrange condition. I have one tune that I can flash and the VVT is active immediately but if I change something in the tune it takes two or three pulls to come online. Anybody no what causes this?

After flash do you let car idle for a couple of minutes, the ecu needs at least one minute of idle at arround 700 rpm to activate vvt system.


Some cars can ve tempromemtal and take longer.


Im not sire of all the parameters the ecu looks for but one is that cams are pretty well zero offset at idle.


The other is vvt initial setting but you need techstream to look at that

[tomm.brz]

One requisite is oil temperature over 30 Celsius

Why do you care waiting for 2 minutes at idle?
It s slow at activating only the first 2 starts after a reflash

[steve99]

Originally Posted by solidsnake11

I think I found the answer.
I have the idle set to 1200rpms to cut down on the transmission rattle, I get from the carbon twin disc clutch.
Sorry steve99 I overlooked the 700rpms you mentioned. So does anybody know what each idle map is for?

I believe its for different phases of the warmup and maybe some other circumstances but i dont know. Also i dont know what idle spped the ecu needs to set vvt mabe try less than 1000 as base idle in all the tables

[steve99]

Originally Posted by solidsnake11

Lowered idle to 950rpm in all idle tables. Seems to fix the cams but it idles about 3 minutes and just dies, like you turned it off. Around and I around I go. Lol

Check your afr at idle should be arround 14.7, but during intial warmup may be 15.


Check long term fuel trims if its way positive might be exhaust leak


Check manifild pressure at idle should be arround 0.3 tp 0.4 bar. With ignition on but engine stopped 1 bar.


If its not pulling down to arround 0.4 bar might be intake leak