P0016 on a 60k mile car

[steve99]

@Ultramaroon


tried techstream 9 no go up dated to techstream 12 still no vvt initial function, had to change to North america version as euro version doent have that function weird

[Ultramaroon]

Originally Posted by steve99

@Ultramaroon


tried techstream 9 no go up dated to techstream 12 still no vvt initial function, had to change to North america version as euro version doent have that function weird

Wow! We are peeling back layers of the secret onion. That's very interesting.


Notice how our numbers match pretty well except for Stig's bank-1 intake.

[TheStig85]

I'm willing to change whatever's necessary, but this is mostly beyond me. Any advice you guys have I'll try it.

[Ultramaroon]

Originally Posted by TheStig85

I'm willing to change whatever's necessary, but this is mostly beyond me. Any advice you guys have I'll try it.

Keep clearing codes and watch to see if "vvt initial position learning value #1" changes over time. If it stays at exactly 45.52 every time you read it, then your ECU is toast.


If it rises at all, it's re-learning. Roll with it.


That's my best guess at this point.

[kinghurl]

Originally Posted by Ultramaroon

Keep clearing codes and watch to see if "vvt initial position learning value #1" changes over time. If it stays at exactly 45.52 every time you read it, then your ECU is toast.


If it rises at all, it's re-learning. Roll with it.


That's my best guess at this point.

This!
Monitor and see the rate of change of the learn values. Allegedly it's SLOW....that's what prompted me to change my ecu....again.

Sent from my SM-G930V using Tapatalk

[TheStig85]

Originally Posted by kinghurl

This!
Monitor and see the rate of change of the learn values. Allegedly it's SLOW....that's what prompted me to change my ecu....again.

Sent from my SM-G930V using Tapatalk

Well...... I haven't said anything on here as I was just driving my car daily. Not sure if it matters or not but I've been clearing the codes every time I entered my car.

Just checked the Learning VVT Values and they are basically identical. Only things that were changed were the Exhaust VVT values, and only by 0.10 or so.

What's left to do ? Lol. Change the ECU, again?! Ugh...

[steve99]

Originally Posted by TheStig85

Well...... I haven't said anything on here as I was just driving my car daily. Not sure if it matters or not but I've been clearing the codes every time I entered my car.

Just checked the Learning VVT Values and they are basically identical. Only things that were changed were the Exhaust VVT values, and only by 0.10 or so.

What's left to do ? Lol. Change the ECU, again?! Ugh...

If the learn value or values dont change it may also be that the ecu isnt seeing correct info from cam position sensors as per pist here


http://www.ft86club.com/forums/showp...&postcount=334

[TheStig85]

Originally Posted by steve99

If the learn value or values dont change it may also be that the ecu isnt seeing correct info from cam position sensors as per pist here


http://www.ft86club.com/forums/showp...&postcount=334

I was going off the Learning values in Tech stream. You pull them when the engine is off.

Sent from my Pixel 2 XL using Tapatalk

[Ultramaroon]

Or more likely, the valve timing is correct but, because the ECU "normal" initial position drifted off over time, it's now stuck interpreting the sudden shift to correct operation as abnormal.

[steve99]

Maybe re flash ecu to hopefully reset vvt learned valies to initial settings

[TheStig85]

Originally Posted by steve99

Maybe re flash ecu to hopefully reset vvt learned valies to initial settings

Being the unexperienced one here, what's the easiest way to reflash it? I've never done it before.

Sent from my Pixel 2 XL using Tapatalk

[Ultramaroon]

Me neither.


It would be great to find out otherwise but I believe if the issue could be fixed with a factory flash, basically a hard reset of the ROM, it would be the standard procedure. It's much quicker & cheaper than replacing the ECU.

This is where you have to make the choice between doing it for science, or just getting back onto the road. I respect the science-&-knowledge approach but it's your whip.

*popcorn gif*

[steve99]

Originally Posted by TheStig85

Being the unexperienced one here, what's the easiest way to reflash it? I've never done it before.

Sent from my Pixel 2 XL using Tapatalk

Originally Posted by Ultramaroon

Me neither.

Tactrix cable see tactrix link below or i just bought a kess v2 clone and it works fine as well

[TheStig85]

Originally Posted by steve99

Tactrix cable see tactrix link below or i just bought a kess v2 clone and it works fine as well

Just harassing James Martin (tuner in Florida) and he says it's mostly likely a sensor or OCV that's bad. He says its a PID system, so it has a learned value.

He's recommending to just swap sensors and/or OCVs. Pull the battery, wait a few minutes to reset it.

Sent from my Pixel 2 XL using Tapatalk