I would start looking at the phasers themselves if everything else checks out ok. I assume you have a non revup motor and the logs are just the intake side.

Also check your crank sensor and see if it has any debris on it etc....

 

I think its the actual VTC pulley.

Ive replaced the IVT solenoid and the corresponding cam sensor. if it was the crank sensor, i'd have other issues as well..

I need to wire both IVT solenoids off 1 channel in my proefi still though.

 

I would still check the CPS as it could still be providing a slightly dirty signal.

I see the difference in banks in cam timing come up when one of the VTC pulleys(phasers) is going out usually if not then one of the solenoids is leaking internally. The exhaust ones tend to fail more then the intake but it does happen.

 

ahh phasers = pulleys.

ya i have the same conclusion. esp with the rattle i get on startup.

 

just like str8dum1, i have the same issue. rattle on cold starts for a second or two, logged data with cipher on the int cam advancement. bank 2 advances with throttle, bank 1 does not or does very little. one of the most extreme cases i saw in my logs was with a throttle blip at about 3100rpm, bank1 was advance 4* and bank 2 was advanced 30*. obviously not ideal, something is up, get a regular p0011 code too.

things i have tried so far:
brand new nissan oem crank sensor (old sensor was clean)
swapped both cam sensors with known good ones (old sensors were clean)
brand new solenoids on both banks
changed oil and filter

the only other thing i can think of is the vtc sprocket/pulley. i just wish there was a way to try and clean it out without removing the timing chain cover.

another note, when logging data, i also monitored the solenoid %, which i think is the signal from the ecu going to the solenoid telling it to advance. the bank 1 solenoid % was going very high, which to me sounds like the ecu's way of trying extra hard to get the bank 1 side to actually advance when it wasnt hardly at all. so, i think the ecu and wiring are ok in my case.

str8dum, did you log info and find similar findings with the %? that might help determine if it is a wiring issue or not, plus the process takes only a couple minutes.

 

when i get home this weekend, i will try cleaning the maf sensor, its easy enough to do that anyway

 

i have barely put anymore time into this lately. they car is finally running well enough, so hopefully i can do some more logging shortly. I just got my uprev cipher and tuner license so i will log some of that. The problem is worse when I am using my Proefi to control the cams and that the endgoal. Having the stock ecu control the cams while everything else is on the standalone is not ideal.

The cam still advances like its supposed to, its just has alot of jitter, like in the 1st post. Not pulling the timing cover anytime soon, so i'm not in a huge hurry.

 

i would be curious to see how that jittery cam advance on the bank 1 side correlates with the solenoid %. curious to see if that is what is driving the jitter or if the solenoid % is stable and the jitter happens separately. in my limited experience, it looks like the solenoid % is what controls the oil pressure, thus the cam advancement

this is really my final issue to sort out on the new motor, ready for tuning once this is resolved. just not looking forward to removing the timing cover, at all...

 

Duty cycle controls the oil flow which controls the advance. On our cars since it only advances the cam 0% is fully retarded and and increasing duty cycle advances.

 

ok, thanks meatbag. so, in order for me to determine if the ecu is sending the correct signal to advance the int cam, i need to log the duty cycle and compare that to the int cam advance? thanks

 

Duty cycle will vary with oil temp, weight, viscosity, etc... That is why they use a PID system to control it because X duty cycle will not always get you the same thing.

You have to look at actual advance compared to whats commanded.

 

so what specific parameter in cipher do i need to monitor and compare to the int cam advance?

 

What settings are you using on the new Haltech box for the cam control? I've seen 3 different solenoid frequencies. What about the PID values?

 

is this to me?
all i have is uprev for tuning. i am NA without boost, but will have a 180 direct port nitrous shot

 

no, bryan (meatbag) should have used the new haltech box i think.

 

Ive got these right now.

Freq: 300hz
Steady State duty: 35%
Min duty: 20%
Max duty: 70%
deadband: 0.7s
Operating coolant: 113F

I have not had a chance to put mine in yet but its what ive used in a customer car. Building a new turbo system and some other stuff.

 

Having some issues with my car when I engage the VVT through the haltech. It's a VQ35de.
As long as the Haltech doesnt engage the VVT, the engine idles and runs fine. When the VVT is engage the car sputters and shuts off.
I'm using BC springs with Kelford 272 camshafts, any ideas?

 

Need more info. Revuo? What are your targets? What PID settings Etc...

I run those cams and springs in mine with no issue on haltech plug in

 

I've played around with the PID settings, Ive tried mapping them strictly against rpm, same result.
There's a difference between the bank A and bank B intake target and actual, could it be the VVT solenoid?

 

Have a log?