Intake Cam Timing advanced 20 Degrees at IDLE - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kris86 · 03-31-2017, 02:11 PM

Hey guys, as the title asks, how do I go about checking the AVCS timing? Can it be adjusted ?

My car has the intake cam advanced 20degrees at idle :-S

Would truly appreciate anyone helpglglglgl

Kodename47 · 03-31-2017, 06:03 PM

How are you measuring that it's 20 degrees at idle? If it's via logging, what are you using? Which bank etc? Same on both? Does it noticeably feel different as it should? It would also likely throw a CEL.

Does it move around if you use the accelerator?

Kris86 · 03-31-2017, 09:28 PM

Quote:

Originally Posted by Kodename47

How are you measuring that it's 20 degrees at idle? If it's via logging, what are you using? Which bank etc? Same on both? Does it noticeably feel different as it should? It would also likely throw a CEL.

Does it move around if you use the accelerator?

I'm doing a idling datalog through ECUTEK for my tuner.

When he go it the first thing he noticed was that the INTAKE cam is at advanced 20 degrees :-/

No engine light ever cam on, and that the weird part

it jumps around when u touch the throttle, but it stays in that particular region, while the others stick around -0 - 1

I think also it was on the left head, I'll have to back check if it's both headsgl

Kris86 · 04-10-2017, 10:53 AM

bump! need some help guys.

cant figure out what is causing this up to now. car wont idle on its own even.

it also sounds like a extreme unequal length header, meaning missing badly.

steve99 · 04-10-2017, 11:57 AM

Quote:

Originally Posted by Kris86

bump! need some help guys.

cant figure out what is causing this up to now. car wont idle on its own even.

it also sounds like a extreme unequal length header, meaning missing badly.

As Kodename47 said weird it not throwing and CEL codes and CEL light

AFAIK cams should all be at 0 at idle.

If just one is reading 20 then its possible that cam sensor is bad. but should throw code due correlation error.

If its now idling like crap mabe the cam actuator is stuck, but again you would expect cel codes/light.

mabe look through these TSB

11-130-13R : Difficulty Starting, Rough Idle, Cam Position, Misfire
http://www.ft86club.com/forums/attac...1&d=1375302652

02-132-12 : DTCs Relating to the AVCS (Active Valve Control System)
http://www.ft86club.com/forums/attac...0&d=1352490977

Amputechture · 04-10-2017, 01:15 PM

You have a JDL kit correct? I am running their kit and the downpipe touches my passenger side Cam Angle Sensor. Lots of others have had this issue, I've wrapped it in a loom and heat tape. Perhaps this could be a culprit?

Kris86 · 04-10-2017, 01:31 PM

Quote:

Originally Posted by steve99

As Kodename47 said weird it not throwing and CEL codes and CEL light

AFAIK cams should all be at 0 at idle.

If just one is reading 20 then its possible that cam sensor is bad. but should throw code due correlation error.

If its now idling like crap mabe the cam actuator is stuck, but again you would expect cel codes/light.

mabe look through these TSB

11-130-13R : Difficulty Starting, Rough Idle, Cam Position, Misfire
http://www.ft86club.com/forums/attac...1&d=1375302652

02-132-12 : DTCs Relating to the AVCS (Active Valve Control System)
http://www.ft86club.com/forums/attac...0&d=1352490977

I too thought it could be the cam solenoids, so I swapped the intake cam solenoids to see if it would move the problem over to the other head, but the issue is still on the left head. Same exact outcome

I will definitely read through the TSB's... I'm taking any advice that comes to me at this point

Kris86 · 04-10-2017, 01:33 PM

Quote:

Originally Posted by Amputechture

You have a JDL kit correct? I am running their kit and the downpipe touches my passenger side Cam Angle Sensor. Lots of others have had this issue, I've wrapped it in a loom and heat tape. Perhaps this could be a culprit?

Yes I do have the JDL kit, I did notice that the down pipe runs rather close to that sensor so I did to a little Fab, but the issue is on the other head

Ragin Gti · 04-10-2017, 01:46 PM

Have you had the timing chain off of the car?

Sent from my iPhone using Tapatalk

Tokay444 · 04-10-2017, 01:55 PM

What is the tune commanding?

Kris86 · 04-10-2017, 03:43 PM

Quote:

Originally Posted by Ragin Gti

Have you had the timing chain off of the car?

Sent from my iPhone using Tapatalk

Yes I just did a complete engine rebuild, changed rods, pistons, valves, springs and retainers

Kris86 · 04-10-2017, 03:47 PM

Quote:

Originally Posted by Tokay444

What is the tune commanding?

Not sure, I am doing F&G with delicious

steve99 · 04-10-2017, 04:04 PM

Quote:

Originally Posted by Ragin Gti

Have you had the timing chain off of the car?

Sent from my iPhone using Tapatalk

Quote:

Originally Posted by Tokay444

What is the tune commanding?

Quote:

Originally Posted by Kris86

Yes I just did a complete engine rebuild, changed rods, pistons, valves, springs and retainers

haha, that changes things :-).

Still strange the ECU doesn't complain if its commanding zero and the sensor reads 20, that's assuming that's whats happening.

Kris86 · 04-10-2017, 04:08 PM

Quote:

Originally Posted by steve99

haha, that changes things :-).

Still strange the ECU doesn't complain if its commanding zero and the sensor reads 20, that's assuming that's whats happening.

Yup! Same thing we all are thinking :-S

No codes makes it so much harder

03-31-2017, 02:11 PM	#1
Kris86 Senior Member Join Date: Feb 2013 Drives: RHD Gt86 Location: Antigua, west indies Posts: 369 Thanks: 619 Thanked 102 Times in 75 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Intake Cam Timing advanced 20 Degrees at IDLE Hey guys, as the title asks, how do I go about checking the AVCS timing? Can it be adjusted ? My car has the intake cam advanced 20degrees at idle :-S Would truly appreciate anyone helpglglglgl __________________ Toyota - Making Dreams A Reality 461hp on 91octane - JDL turbo GTX3076r GEN 2 - Mazworx CD009 transmission Last edited by Kris86; 04-10-2017 at 10:55 AM.

03-31-2017, 06:03 PM	#2
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,632 Times in 1,113 Posts Mentioned: 156 Post(s) Tagged: 1 Thread(s)	How are you measuring that it's 20 degrees at idle? If it's via logging, what are you using? Which bank etc? Same on both? Does it noticeably feel different as it should? It would also likely throw a CEL. Does it move around if you use the accelerator? __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

04-10-2017, 10:53 AM	#4
Kris86 Senior Member Join Date: Feb 2013 Drives: RHD Gt86 Location: Antigua, west indies Posts: 369 Thanks: 619 Thanked 102 Times in 75 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	bump! need some help guys. cant figure out what is causing this up to now. car wont idle on its own even. it also sounds like a extreme unequal length header, meaning missing badly. __________________ Toyota - Making Dreams A Reality 461hp on 91octane - JDL turbo GTX3076r GEN 2 - Mazworx CD009 transmission

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Amputechture Senior Member Join Date: Aug 2015 Drives: 2014 BRZ Location: FL Posts: 424 Thanks: 49 Thanked 143 Times in 111 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	You have a JDL kit correct? I am running their kit and the downpipe touches my passenger side Cam Angle Sensor. Lots of others have had this issue, I've wrapped it in a loom and heat tape. Perhaps this could be a culprit?

04-10-2017, 01:46 PM	#9
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04-10-2017, 01:55 PM	#10
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