S4 w/ RS6 Turbos Issue

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Topic: S4 w/ RS6 Turbos Issue (Read 31182 times)

tjwasiak

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	Re: S4 w/ RS6 Turbos Issue « Reply #45 on: May 09, 2015, 04:41:59 PM »

Quote from: prj on May 09, 2015, 03:47:50 PM

Disabling EGT's is done by 3 codewords, not disabling DTC's. That does absolutely nothing to solve the issue.

CDATR, CDATS and which one?


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BerkleyJ

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	Re: S4 w/ RS6 Turbos Issue « Reply #46 on: May 09, 2015, 04:47:55 PM »

Quote from: tjwasiak on May 09, 2015, 04:41:59 PM

CDATR, CDATS and which one?

Quote

If you want to disable your EGT sensors:[60] (Note that my old M-box xdf is wrong[61] for CDATR/ATS. Please use these offsets.)

CDATR (0x18196) - Configuration byte diagnosis exhaust gas temperature regulation
CDATS (0x18197) - Configuration byte diagnosis exhaust gas temperature sensor

There is anecdotal evidence[62] that this will not allow you to completely remove the EGT sensors; keeping dead ones connected might be necessary, or:

CATR (0x192CA) - Configuration byte exhaust gas temperature regulation[63]

Alternately, setting both of these to their maximum (1229) may help: [64]

TABGSS (0x1C514) and TABGSS2 (0x1C516) - Desired exhaust gas temperature for EGT regulation

You shouldn't have to touch these, but are included here for completeness:

CLAATR - Error class exhaust gas temperature regulation
CLAATR2 - Error class exhaust gas temperature regulation bank 2
CLAATS - Error class exhaust gas temperature sensor
CLAATS2 - Error class exhaust gas temperature sensor bank 2

From the S4wiki


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ddillenger

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	Re: S4 w/ RS6 Turbos Issue « Reply #47 on: May 09, 2015, 10:37:09 PM »

Quote from: tjwasiak on May 09, 2015, 04:41:59 PM

CDATR, CDATS and which one?

CATR


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BerkleyJ

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	Re: S4 w/ RS6 Turbos Issue « Reply #48 on: May 15, 2015, 04:24:03 AM »

That did in fact solve the issue, as my one EGT sensor was intermittently failing.

I have run into a new (less problematic) issue. Under WOT, as soon as I hit peak boost, it chokes up for just a fraction of second or so and then pulls fine the rest of the way. I'll try to get a log up soon.

Nevermind, It's just throttle cut from overboost. Still working on the tune.


« Last Edit: May 15, 2015, 10:57:52 AM by BerkleyJ »	Logged

nyet

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	Re: S4 w/ RS6 Turbos Issue « Reply #49 on: May 18, 2015, 03:37:24 PM »

Quote from: BerkleyJ on May 15, 2015, 04:24:03 AM

Nevermind, It's just throttle cut from overboost. Still working on the tune.

the last log you posted showed no overboost.


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BerkleyJ

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	Re: S4 w/ RS6 Turbos Issue « Reply #50 on: May 20, 2015, 03:34:41 AM »

Quote from: nyet on May 18, 2015, 03:37:24 PM

the last log you posted showed no overboost.

Are you talking about the "DifferentTuneLog.csv"

Because that's a locked down VAST tune with a few other issues including improperly coded out O2 sensors.

Here's a log with the throttle cut. I think I was running a janked up KFLDRQ2 at the time. I've since moved on.


« Last Edit: May 20, 2015, 03:43:38 AM by BerkleyJ »	Logged

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