Vvti 2jz gte issue

Jdmfreak · Post by **Jdmfreak** » Sun Jun 14, 2015 12:44 pm

https://vimeo.com/130693232

I switched from rising edge to falling edge to see if it would change anything and with zero sync loss and timing locked to 10° it jumps from 10° to 20° when I Rev it

Jdmfreak · Post by **Jdmfreak** » Sun Jun 14, 2015 1:26 pm

i pulled timing added fuel switched to wasted cop and turned off vvti now it cuts around 5krpm

Matt Cramer · Post by **Matt Cramer** » Mon Jun 15, 2015 6:17 am

Can you get a tooth log of the timing jump?

Jdmfreak · Post by **Jdmfreak** » Mon Jun 15, 2015 6:19 am

Yes I can if it would help, but I went ahead and switched it back to rising and added latency till it was rock solid which ended up being 80usec it only jumped on falling edge

Should I switch it back to falling and get a log?

Jdmfreak · Post by **Jdmfreak** » Mon Jun 15, 2015 6:23 am

Turned back to cop still cuts out around 5k,

added fuel to my ve table till I was uncomfortably rich and the lean spike/miss happens at the same point

Jdmfreak · Post by **Jdmfreak** » Mon Jun 22, 2015 8:23 pm

Still chasing this problem.... A Friend went through my tune and changed some stuff now it back to only breaking up with boost on and at 4k rpm

Jdmfreak · Post by **Jdmfreak** » Mon Jun 22, 2015 9:44 pm

Can anyone tell me if my vvti 1 angle is supposed to jump around like it does? If I Rev the car it retards more than it is at idle

Matt Cramer · Post by **Matt Cramer** » Tue Jun 23, 2015 8:14 am

A slightly wavy VVT angle isn't that odd - the real problem there is it isn't coming anywhere close to hitting its targets.

Jdmfreak · Post by **Jdmfreak** » Tue Jun 23, 2015 8:21 am

Ok, that is probably my settings, I really haven't tried to tune it in much at all because if it had to do with the cam sensor I should be able to run wasted cop and vvti off without a issue, correct?

one other question, Why don't I get sync loss when the vvt changes position? Wouldn't it change how many crank teeth it sees between cam teeth?

Matt Cramer · Post by **Matt Cramer** » Tue Jun 23, 2015 8:41 am

Jdmfreak wrote:Ok, that is probably my settings, I really haven't tried to tune it in much at all because if it had to do with the cam sensor I should be able to run wasted cop and vvti off without a issue, correct?

Correct, you can run without a cam sensor if you have the VVTi off and are not running anything sequentially. But an out of place cam might make the motor run poorly.

one other question, Why don't I get sync loss when the vvt changes position? Wouldn't it change how many crank teeth it sees between cam teeth?

Because the 2JZ-VVTi wheel decoder is intentionally designed to maintain sync at any possible cam location.

Jdmfreak · Post by **Jdmfreak** » Tue Jun 23, 2015 9:54 am

Ok, that makes sense, how can I tell if I have a clean signal on my cam? Just the Composite Logger? It looks clean except for a couple blank pages in the log I took up a few posts that was while driving, and while it was breaking up.

Do I need to be running wasted cop with the 2jz vvti wheel setup or am I good running fully sequential?

Jdmfreak · Post by **Jdmfreak** » Tue Jun 23, 2015 10:53 am

What frequency should I be running the vvt solenoid at?

Rusty · Post by **Rusty** » Wed Jun 24, 2015 1:35 am

Hello, I have a 1jzgte vvti running perfect except for vvti control . I had an issue with it breaking up just like your describing and I found on this forum it needed a resister on the crank signal worked perfect. Could please post a screen capture of your vvti settings?

rusty

Matt Cramer · Post by **Matt Cramer** » Wed Jun 24, 2015 5:15 am

Jdmfreak wrote:Ok, that makes sense, how can I tell if I have a clean signal on my cam? Just the Composite Logger?

Yep, that is the best bet. You should see three cam pulses for every two turns of the crank.

Do I need to be running wasted cop with the 2jz vvti wheel setup or am I good running fully sequential?

It's good for full sequential.

You may need to experiment with the frequency and PID settings for the solenoid. First use test mode to find a frequency that gives response across a wide duty cycle range, then dial in the PID settings.

Jdmfreak · Post by **Jdmfreak** » Wed Jun 24, 2015 8:57 am

here is a composite log while driving breakup happened during this log

2015-06-14_16.25.47.csv.zip

everything looks great to me , however there are 2 pages that are blank in the log

could it be i need to adjust the pots a bit more?

Or maybe just add some resistors in line?

Matt Cramer · Post by **Matt Cramer** » Thu Jun 25, 2015 5:36 am

It looks pretty normal to me. Make sure you're not running any software noise filtering on the cam.

Jdmfreak · Post by **Jdmfreak** » Tue Jun 30, 2015 6:48 am

Not running any software, I played with the pots, I zeroed them and adjusted them cw just until the signal is clear, same issue, I am considering zeroing the pots and adding resistors? Think it would help?

Jdmfreak · Post by **Jdmfreak** » Fri Jul 17, 2015 8:47 am

Ive added resistors, adjusted pots and found if i add a wire between sensor ground and the vr- my breakup happens at 5k instead of 4k rpm but other than that no change, im about out of ideas

Matt Cramer · Post by **Matt Cramer** » Fri Jul 17, 2015 10:35 am

Can you post a composite log and tooth log of the breakup with the latest settings?

Jdmfreak · Post by **Jdmfreak** » Fri Jul 17, 2015 10:36 am

Yes, I'll do that this weekend

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