Intake Cam Timing advanced 20 Degrees at IDLE

[steve99]

Originally Posted by Kris86

Yup! Same thing we all are thinking :-S

No codes makes it so much harder

If the ecutek logging for that cam and your ROM id is incorrect it could explain it.


but doesn't explain why engine runs like crap.

[Kodename47]

You should be able to log AVCS commanded, however at idle it should be 0 degrees.

Did the cams get timed correctly when it was put back together? That's the obvious issue and may need checking. If it's not that then I'd guess something is preventing oil flow to the solenoid to give it control. The fact the engine has been apart and is running poorly suggests it's going to be mechanical.

[Kris86]

Originally Posted by Kodename47

You should be able to log AVCS commanded, however at idle it should be 0 degrees.

Did the cams get timed correctly when it was put back together? That's the obvious issue and may need checking. If it's not that then I'd guess something is preventing oil flow to the solenoid to give it control. The fact the engine has been apart and is running poorly suggests it's going to be mechanical.

Thank you very much for your honest opinion. My mechanic has thought also it could be internal.

My mechanic took off the front cover and back checked the timing and said it is correct.

I will be speaking with my mechanic about looking into taking the engine back out and atleast check the internals and also make sure no oil ports are being blocked

[Kris86]

Originally Posted by steve99

If the ecutek logging for that cam and your ROM id is incorrect it could explain it.


but doesn't explain why engine runs like crap.

Would be tuner be able to pick this up through the log I sent him?

[Ragin Gti]

I'd bet the chain is on wrong. It's also possible to install the cam sprockets incorrectly. They have a nipple on the back side to locate them properly but if you just run the bolts in anyway they bolt on.


Sent from my iPhone using Tapatalk

[Kris86]

Originally Posted by Ragin Gti

I'd bet the chain is on wrong. It's also possible to install the cam sprockets incorrectly. They have a nipple on the back side to locate them properly but if you just run the bolts in anyway they bolt on.


Sent from my iPhone using Tapatalk

Calling my mechanic right now to mention this

[steve99]

Originally Posted by Kris86

Would be tuner be able to pick this up through the log I sent him?

As kodename47 said it's most likely mechanical issue. It's often difficult to detect from logs if it's mechanical issue. Best way would be to log a car with same calibration I'd ecu and confirm it logs ok

[Kodename47]

Originally Posted by Kris86

Would be tuner be able to pick this up through the log I sent him?

If you're logging using the supplied tune that is flashed to the car, this isn't the issue. As Steve said, it wouldn't tie in with the poor running anyway.

[Kris86]

Originally Posted by steve99

As kodename47 said it's most likely mechanical issue. It's often difficult to detect from logs if it's mechanical issue. Best way would be to log a car with same calibration I'd ecu and confirm it logs ok

but what all mechanically could be related to this?


I have already got and replaced the cam sprocket :-S

[Kris86]

Originally Posted by Kodename47

If you're logging using the supplied tune that is flashed to the car, this isn't the issue. As Steve said, it wouldn't tie in with the poor running anyway.

any ideas as to what all mechanically I can look for?

[Kris86]

Originally Posted by Ragin Gti

I'd bet the chain is on wrong. It's also possible to install the cam sprockets incorrectly. They have a nipple on the back side to locate them properly but if you just run the bolts in anyway they bolt on.


Sent from my iPhone using Tapatalk

all were installed correctly according to the Service Manual


anything else I can have a look at?

[Kris86]

Originally Posted by Kodename47

You should be able to log AVCS commanded, however at idle it should be 0 degrees.

Did the cams get timed correctly when it was put back together? That's the obvious issue and may need checking. If it's not that then I'd guess something is preventing oil flow to the solenoid to give it control. The fact the engine has been apart and is running poorly suggests it's going to be mechanical.

is it true that the cam sprockets advance timing with increased oil pressure?


so does this mean I dont have a oil pressure issue u think? or can lack of oil still cause this

[Kodename47]

Originally Posted by Kris86

is it true that the cam sprockets advance timing with increased oil pressure?


so does this mean I dont have a oil pressure issue u think? or can lack of oil still cause this

Having a quick look at this: https://web.archive.org/web/20110820...hatsInside.htm

Oil control valve: The control unit then actuates changes through an oil control valve positioned at each intake camshaft sprocket. The oil control valve uses oil pressure from the engine to advance and retard the intake camshafts via the AVCS actuator.

Actuator: Mounted in the chain- or belt-driven drive sprocket, the actuator is fitted directly to the camshaft. Chambers in the actuator allow oil pressure to advance or retard it within the timing-belt sprocket. The oil fills the chambers and pushes against three lobes to turn the actuator and the camshaft on its axis.

Having not looked into the system in detail I can't comment more, but there are only a few components that control the system. Is this the original cam systems? I'm sure I've read that some issues have occurred using older/newer components to the original ECU.

[Kris86]

Originally Posted by Kodename47

Having a quick look at this: https://web.archive.org/web/20110820...hatsInside.htm



Having not looked into the system in detail I can't comment more, but there are only a few components that control the system. Is this the original cam systems? I'm sure I've read that some issues have occurred using older/newer components to the original ECU.

I'm going to have a read on this myself

Yes these are the same stock cams and cam sprockets that came on the motor that were reused, up until this past weekend when I got another sprocket from the U.S and changed it to see if anything changes, got the very same result