[seventeenapg]

Guys,

I took in cat red for an oil change at 1500 miles ( I supplied the parts) and the labour was £110.00!!. 

Anyway whilst in there the technician was able to tell me that a fault had been logged for both exhaust valves and he then saw them disconnected. He came to me to ask of I had wanted them reconnected and I said no. He went on to say that it would not affect any warranty. But, I thought that these little kits would not create a fault, wrong!

 

I have the little kit that plugs directly onto the wiring loom at the exhaust valves.

[T-800]

Guys,
I took in cat red for an oil change at 1500 miles ( I supplied the parts) and the labour was £110.00!!.
Anyway whilst in there the technician was able to tell me that a fault had been logged for both exhaust valves and he then saw them disconnected. He came to me to ask of I had wanted them reconnected and I said no. He went on to say that it would not affect any warranty. But, I thought that these little kits would not create a fault, wrong!

I have the little kit that plugs directly onto the wiring loom at the exhaust valves.

If done whilst ignition is live you will get an error

Best to wait while VC is powered down and keep door closed so it’s not triggered by door opening.

[RS777]

If done whilst ignition is live you will get an error
Best to wait while VC is powered down and keep door closed so it’s not triggered by door opening.

Great news because I fitted mine whilst the car was locked and everything off without even considering any of the above.

[seventeenapg]

But I did have the car switched off and doors not opened. In fact, the keys (keyless entry) were nowhere near the car at the time.. Maybe just maybe the guy saw the wires taped up and went on to tell me of the fault code. Who knows...

[T-800]

But I did have the car switched off and doors not opened. In fact, the keys (keyless entry) were nowhere near the car at the time.. Maybe just maybe the guy saw the wires taped up and went on to tell me of the fault code. Who knows...

How Bizarre

If all Four delete plugs are used than there should be no errors, as this is what they are designed for.

Maybe you already the errors ?

It’s difficult if you don’t have VCDS or the like to clear them.

[Wingnut_RS]

How Bizarre

If all Four delete plugs are used than there should be no errors, as this is what they are designed for.

Maybe you already the errors ?

It’s difficult if you don’t have VCDS or the like to clear them.

Are the flaps on the RS3 similar to the Golf R mk7 because I didn’t need to plug in a delete device, it was simply a case of plugging in VCDS, putting the car into sport mode to open the valves and unticking “exhaust flaps installed” and that was it, no fault codes logged and the existing flaps remain wired up ready to change back if needed.

I haven’t tried it yet on the RS3 because it’s noisy enough, would it not be the same principle?


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[T-800]

Are the flaps on the RS3 similar to the Golf R mk7 because I didn’t need to plug in a delete device, it was simply a case of plugging in VCDS, putting the car into sport mode to open the valves and unticking “exhaust flaps installed” and that was it, no fault codes logged and the existing flaps remain wired up ready to change back if needed.

I haven’t tried it yet on the RS3 because it’s noisy enough, would it not be the same principle?


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Sadly no not at the moment.

The bits in the ECU 01 aren’t all labelled yet, so the ones you use for a G7R aren’t the same in the 3.

[Wingnut_RS]

Sadly no not at the moment.

The bits in the ECU 01 aren’t all labelled yet, so the ones you use for a G7R aren’t the same in the 3.

Is it not possible to change it in the basic settings?


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[T-800]

Is it not possible to change it in the basic settings?


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Basic settings won’t alter the way a module is set it’ll calibrate certain items but not alter coding / adaptions

Like headlamps etc which can be reset using Basic settings, but the headlamp coding will not be changed by a calibration/reset.

[Wingnut_RS]

Basic settings won’t alter the way a module is set it’ll calibrate certain items but not alter coding / adaptions

Like headlamps etc which can be reset using Basic settings, but the headlamp coding will not be changed by a calibration/reset.

I didn’t think it’d be as simple as the R, nothing is ever straight forward when it comes to the RS3

If I get the chance I’ll plug in my laptop and change a few of the settings around, I’m sure they’ll be one of them that disables the flaps, hopefully I’ll find the correct byte before I disable the whole car


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[T-800]

I didn’t think it’d be as simple as the R, nothing is ever straight forward when it comes to the RS3

If I get the chance I’ll plug in my laptop and change a few of the settings around, I’m sure they’ll be one of them that disables the flaps, hopefully I’ll find the correct byte before I disable the whole car


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If you just go into the engine ecu ticking / unticking random unlabelled bits / bytes you may end up with a broken car.

Very dangerous approach as you have no idea what it might do when there’s no info next to it.

[T-800]

I should point out to any one randomly unplugging the valves that if you do it with the car ‘live’ it will log errors, an upshot of having errors stored in the ecu will be at 5k RPM the car will back the power off.....

Because it thinks the valves have a problem.

So it’s best to do it with the car locked say in a morning before you unlock it because the valves default to open on a cold start or after a run lock it and leave the canbus to shut down, the valves will default to open as it shuts down.

If you think you have errors because of it then I’d get them cleared

All this is assuming people use the proper delete / termination plugs that don’t cause any errors once correctly installed.

If you just unplug and tape up on the FL car your in for problems.

[Wingnut_RS]

If you just go into the engine ecu ticking / unticking random unlabelled bits / bytes you may end up with a broken car.

Very dangerous approach as you have no idea what it might do when there’s no info next to it.

I would say that it’s all part of the fun, ticking and unticking boxes to see what stops working but I don’t think my wife would be happy when it needs recovering to the dealership, it’s already going in on Wednesday because the horn has decided to stop working and the first thing she asked is whether I’d been messing around with diagnostics (again)
I said it was definitely not me this time but for some reason she didn’t believe me because she knows me too well

I presume that eventually Ross-tech will release an update with info on all of choices the bits and bytes control so it might be wise for me to leave it alone for now


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[Fivepotfan]

I should point out to any one randomly unplugging the valves that if you do it with the car ‘live’ it will log errors, an upshot of having errors stored in the ecu will be at 5k RPM the car will back the power off.....

Because it thinks the valves have a problem.

So it’s best to do it with the car locked say in a morning before you unlock it because the valves default to open on a cold start or after a run lock it and leave the canbus to shut down, the valves will default to open as it shuts down.

If you think you have errors because of it then I’d get them cleared

All this is assuming people use the proper delete / termination plugs that don’t cause any errors once correctly installed.

If you just unplug and tape up on the FL car your in for problems.

I can confirm this from my own experiences. Below is the dyno print out of two stock RS3 's, my car is the red line. It initially looked as if the exhaust disconnect had paid off until the rpm reached 5Krpm. The ECU then decided to pull power and I lost somewhere in the region of 70ps before the ECU finally capitulated and allowed the car to reach peak power. It's worth noting that I could not feel this happening on the road, in fact at lower rpm the car actually felt faster than stock (which is proven by the the initial power curve until it gets to 5000rpm)

Edited by Fivepotfan, 20 August 2018 - 02:11 PM.

[seventeenapg]

I should point out to any one randomly unplugging the valves that if you do it with the car ‘live’ it will log errors, an upshot of having errors stored in the ecu will be at 5k RPM the car will back the power off.....

Because it thinks the valves have a problem.

So it’s best to do it with the car locked say in a morning before you unlock it because the valves default to open on a cold start or after a run lock it and leave the canbus to shut down, the valves will default to open as it shuts down.

If you think you have errors because of it then I’d get them cleared

All this is assuming people use the proper delete / termination plugs that don’t cause any errors once correctly installed.

If you just unplug and tape up on the FL car your in for problems.

 

Thanks T. I will check with the technician to ensure he has cleared whatever codes were there.

[Fivepotfan]

I can confirm this from my own experiences. Below is the dyno print out of two stock RS3 's, my car is the red line. It initially looked as if the exhaust disconnect had paid off until the rpm reached 5Krpm. The ECU then decided to pull power and I lost somewhere in the region of 70ps before the ECU finally capitulated and allowed the car to reach peak power. It's worth noting that I could not feel this happening on the road, in fact at lower rpm the car actually felt faster than stock (which is proven by the the initial power curve until it gets to 5000rpm)

Here's some more evidence that messing with the FL car's exhaust flaps and leaving error codes in the ECU will cause loss of power when exceeding 5K rpm. This was posted on another forum by a guy who took his car to MRC for a stage 1 remap. The stock dyno run shows a similar loss in the power curve and torque to the chart I posted (highlighted in red) when revving past 5000 rpm. Wonder how many owners are cruising about enjoying the extra sound from the disconnected exhaust valves but don't realise they are losing power.

Attached Files

•  IMG_3654.JPG   59.19K   0 downloads

Edited by Fivepotfan, 07 September 2018 - 09:07 PM.

[Fivepotfan]

Here's another example of a stock power curve suffering from the dreaded power loss at 5K, again probably due to the exhaust flaps being disconnected at some point.

However, this time it would seem that AWE Tuning have used it to their advantage to publicise some optimistic power gains for the RS3 if you fit one of their 'Switchpath' exhausts They claim 45hp and 40lbs/ft gains compared to stock but this seems mis-leading based on their spurious looking dyno chart results (see below). It also sounds rubbish too in my opinion.

If the power curve followed the normal route for a stock car then the gains would be much less at the top end , probably no more than 10 or 12hp.

 

 

Attached Files

•  IMG_3666.JPG   44.54K   0 downloads

Edited by Fivepotfan, 10 September 2018 - 10:17 PM.

[terminator x]

T800 afaik thinks it only happens if valves disconnected when car isn't turned off and "cold" if you like eg if you make sure valves are properly open it should be OK. Valve controller sounds better imho.

TX.

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[domino]

hi guys, i bought 2 new exhaust valve motors to install on my oe exhaust as i put originals on my milltek

 

they shipped with the pin in a north south orientation, however my original motors came off with the pin in a diagonal orientation

 

is there some kind of coding reset to do to get the new motors to orient correctly to line up

Attached Files

•  thumbnail (27).jpg   61.19K   0 downloads
•  thumbnail (26).jpg   63.46K   0 downloads

Edited by domino, 28 October 2020 - 01:20 AM.