APR tune turns off cold start feature?

[Deep Sea S4]

Curious if any of you have heard about this before. I had my stage 2 S4 recently re-flashed from v2.1 to v2.2

I noticed over the past week or so that my car no longer would hold a high idle on cold start.

My dealer just got the response back from APR and their tech confirmed the following

"I just confirmed we turned off cold start to smooth out starting, keep the exhaust quiet in the morning, and to get better gas mileage.

It doesn't hurt anything. It's only there to light off the catalyst, which on all other platforms is removed. So the customer should have no negative impacts from this being done"

Seems strange to me.

Thoughts

[DATZ]

My Stage II v2 still idles at 1,200 - 1,400 for 20 seconds or so at cold start. Always has.

[richib86]

I have the same thing on my v2.2 it's totally fine

[Deep Sea S4]

I have the same thing on my v2.2 it's totally fine

Meaning your cold start is disabled like mine?

[Killaapp]

when was stage v2.2 released? what else was updated?

[1MORLAP]

That would be AWESOME. I hate the cold start feature. Especially with exhausts it is annoying. Remember, this is not the old choke, this is simply extra fuel to warm up the cat more quickly. It wastes fuel and makes noise. I am glad they did that. ESS for M3s did it too. It was highly sought after people with exhausts and neighbors. :-)

[paul]

Cold starts has a purpose for emissions and also to help burn fuel when the motor is cold. That said 2.2 removed cold start. I inquired and they said they don't touch it but clearly it went away with 2.2. I'm glad to see that I am not the only one and that it is the latest tune. There was/is a cold start issue in some cars in truly cold weather. I've experienced it with the prior version of the code when the car was parked outside on a colder day <40* overnight. This must be their way to resolve the cold start issues.

[integroid]

Hah and I thought it was just me! Glad to hear I am not crazy:)

[1MORLAP]

Cold starts has a purpose for emissions and also to help burn fuel when the motor is cold. That said 2.2 removed cold start. I inquired and they said they don't touch it but clearly it went away with 2.2. I'm glad to see that I am not the only one and that it is the latest tune. There was/is a cold start issue in some cars in truly cold weather. I've experienced it with the prior version of the code when the car was parked outside on a colder day <40* overnight. This must be their way to resolve the cold start issues.

OK, to be clear, what I know of is disabling secondary air injection - 2nd air pump that pumps air into the engine for teh first 15 seconds or so. That is what BMW tuners have bee killing. The mixture ratio, etc associated with cold start out to stay the same - OEM.

[phantomblack]

when was stage v2.2 released? what else was updated?

+1

[well_armed]

Curious if any of you have heard about this before. I had my stage 2 S4 recently re-flashed from v2.1 to v2.2

I noticed over the past week or so that my car no longer would hold a high idle on cold start.

My dealer just got the response back from APR and their tech confirmed the following

"I just confirmed we turned off cold start to smooth out starting, keep the exhaust quiet in the morning, and to get better gas mileage.

It doesn't hurt anything. It's only there to light off the catalyst, which on all other platforms is removed. So the customer should have no negative impacts from this being done"

Seems strange to me.

Thoughts

This is awesome. I have no cats so this would definitely make my wife happy when I take off early in the morning....

[richib86]

when was stage v2.2 released? what else was updated?

it updates an issue some of us were having where it would cut throttle when shifting very aggressively

[b6bydesign04]

FWIW, I have the stage 2 tune only (no pulley or CPS), and my car still cold starts.

[richib86]

FWIW, I have the stage 2 tune only (no pulley or CPS), and my car still cold starts.

READ!!! its only on v2.2 lol

[Auditude2.0T]

FWIW, I have the stage 2 tune only (no pulley or CPS), and my car still cold starts.

2.2 on Stage 2 cars are the ones that have this feature disabled.

You have Stage 1 V2.1 if you have no pulley. The 2.2 was released to fix the shift issue. I believe this is now available for Stage 1 cars no also, meaning you'll be Stage 1 V2.2

[b6bydesign04]

READ!!! its only on v2.2 lol

And here I thought my 'FWIW' would get me a pass

[phantomblack]

so that's what it is, i thought I just broke my car...and then it fixed itself by the grace of the audi gods.

i need me some v2.2

it updates an issue some of us were having where it would cut throttle when shifting very aggressively

[phantomblack]

actually, I felt it when i was stage 1. While taking a few runs with Legacykid I felt like I went into limp mode after a hard shift. After a few seconds, I was back to normal. I haven't felt it since going stage 2+.

but nice to know there's a fix.

[silentbob]

Curious if any of you have heard about this before. I had my stage 2 S4 recently re-flashed from v2.1 to v2.2

I noticed over the past week or so that my car no longer would hold a high idle on cold start.

My dealer just got the response back from APR and their tech confirmed the following

"I just confirmed we turned off cold start to smooth out starting, keep the exhaust quiet in the morning, and to get better gas mileage.

It doesn't hurt anything. It's only there to light off the catalyst, which on all other platforms is removed. So the customer should have no negative impacts from this being done"

Seems strange to me.

Thoughts

The cold start feature you are refering to is catalyst heating. It involves a high idle speed setpoint and a very late ignition angle to put all the energy out the exhaust to light of the cat as soon as possible in the emission test. The late ignition angle is why the engine is running so crappy and also the reason being so loud. It's around 20s because that is the time the car is idleing in the FTP75 emission test before the driving part begins ;)
Turning it off has no negative side effects and should improve fuel mileage a bit because with the late ignition angle the engine runs with very poor efficiency.

[Killaapp]

so that's what it is, i thought I just broke my car...and then it fixed itself by the grace of the audi gods.

i need me some v2.2

/sigh i've been complaining about this since i got v2 at waterfest last year...

thanks for the info

[Deep Sea S4]

Good info guys. As an aside the power delay is gone with this updated version.

[richib86]

Good info guys. As an aside the power delay is gone with this updated version.

i would hope so haha

[Tomasz@Startup]

The cold start feature you are refering to is catalyst heating. It involves a high idle speed setpoint and a very late ignition angle to put all the energy out the exhaust to light of the cat as soon as possible in the emission test. The late ignition angle is why the engine is running so crappy and also the reason being so loud. It's around 20s because that is the time the car is idleing in the FTP75 emission test before the driving part begins ;)
Turning it off has no negative side effects and should improve fuel mileage a bit because with the late ignition angle the engine runs with very poor efficiency.

This! Thank you APR for disabling cold start feature in 2.2.

[yourownhero]

If purchased Stage 2 APR tune through ECStuning, (shipped in ecu), how do we get upgrades to the software and is it free? I currently have v2.01.

[richib86]

If purchased Stage 2 APR tune through ECStuning, (shipped in ecu), how do we get upgrades to the software and is it free? I currently have v2.01.

yes its free, either send your ecu back to ecs or just go to you local apr dealer and have them flash on the spot

[well_armed]

You can drive to your local APR dealer if their is one closer.

[Legacykid]

I have a question for you guys. when WOT did you guys hear an audible wistle from the SC. I have stg 2 intake as well. But since 2.2 upgrade I do not hear it anymore.

Notes: no cold start, get ESP light sometimes and limp mode( restart fixes it) And maybe im used to it, but 2.0 felt faster than 2.2. anyone else having weird issues?

[integroid]

Oh good lord....Now we get to hear swank going off on his little fits on how bad of a company APR is.

There is a known problem with 2.2 and extreme cold it seems like. Contact arin@apr on this forum or call/email him.

[helix139]

I have a question for you guys. when WOT did you guys hear an audible wistle from the SC. I have stg 2 intake as well. But since 2.2 upgrade I do not hear it anymore.

Notes: no cold start, get ESP light sometimes and limp mode( restart fixes it) And maybe im used to it, but 2.0 felt faster than 2.2. anyone else having weird issues?

There's a limp mode problem with 2.2 in certain conditions in very cold weather that has been talked about in another thread. Arin has stated that they have a fix and will be rolling it out to dealers soon.

[macbook1]

I love this cold start delete, it keeps my neighbors from killing me in the early mornings (5am) when I goto work.....good job APR

[westwest888]

I like the high idle at startup. It makes the car sound more awesome to passers by, security cameras, etc.

[Legacykid]

There's a limp mode problem with 2.2 in certain conditions in very cold weather that has been talked about in another thread. Arin has stated that they have a fix and will be rolling it out to dealers soon.

Funny part is It actually has not gone limp in a while, this was in the summer.

[dangerous_dave7]

I like the high idle at startup. It makes the car sound more awesome to passers by, security cameras, etc.

Yeah I'm always thinking - "I wonder how good my car sounds to that security camera over there..."

[integroid]

I have a question for you guys. when WOT did you guys hear an audible wistle from the SC. I have stg 2 intake as well. But since 2.2 upgrade I do not hear it anymore.

Maybe because it is winter now and your windows/sunroof are shut? I can hear mine but I modified the bottom portion of the airbox to get more sound.

[YelloJello]

Funny part is It actually has not gone limp in a while, this was in the summer.

tee hee hee

[schirm]

Was tuned to APR stage 1 recently, and I do not believe I have the cold start. I will have to double check later, but I remember it being gone.

[Skywagon]

I had an APR tune and pulley installed two weeks ago. Still have cold start function.

[helix139]

I had an APR tune and pulley installed two weeks ago. Still have cold start function.

You shouldn't AFAIK.

[integroid]

Doesnt the newest APR tune have cold start re-enabled?

[Legacykid]

Maybe because it is winter now and your windows/sunroof are shut? I can hear mine but I modified the bottom portion of the airbox to get more sound.

No my SC has been quite audible since the day I got her. with the stage 2 tune she would almost scream after 5k rpm. Doesnt feel any slower, just miss that sound.

tee hee hee

As I wrote this I was saying dude your setting your self up. haha