What channels should I log?

[RSoverAll]

Want to collect data for some logs in the morning but not 100% on which channels are needed to best diagnose a problem. Lately seems low on power and not the freight train I know it can be...

Quick search says 3,31,115 in Turbo Mode. 2nd gear @2500 rpm to redline.

I did a quick log today of channel 3 but block 2 (single block w/ combined MAF readings) never even saw 300 g/s... I know that's not right given 450bhp x .80

Any other channels you guys recommend? or suggestions?

[4everRS]

Like you said, 3,31,115 in turbo mode. Please post the results.

[lswing]

3rd gear, 2,500 RPM to redline. 2nd gear spins out too quick. Blocks 3, 31, and 115 will give you timing and boost, should be a good indicator of your issues. Activate turbo mode before logging, gives a much more detailed graph. Once you get your log cleaned up in Excel, export as webpage, then open webpage in a browser and copy numbers with cursor, then paste into reply on here, it can be tricky.

[DHall1]

3rd gear is better

Log before you are too heat soaked....then perform a sneaky reset.....go out and log one more.

Car off...turn key on, gas pedal to floor, 5 sec, key off, then gas pedal release. Wait 7 minutes

Go out and log again


Remember these cars are pigs in the heat...esp if your stock.

[RSoverAll]

3rd gear is better

Log before you are too heat soaked....then perform a sneaky reset.....go out and log one more.

Car off...turn key on, gas pedal to floor, 5 sec, key off, then gas pedal release. Wait 7 minutes

Go out and log again


Remember these cars are pigs in the heat...esp if your stock.

Sneaky reset? I didn't see that one in the Bentley manual. Could you elaborate, as far as what it resets and why choose that over clearing the ecu memory w VCDS...

[ttboost]

If you already logged and didn't see over 300 g/s, check for leaks before you log again. Likely your MAFS are leaking between the MAFs and intake. Push down on your airbox and make sure it is fully seated. I've eliminated this problem by removing my MAFs from the airbox, and let them sit in the intake. So IF they leak, they leak before the MAF. They MAY suck unfiltered air, but not enough to matter and I hadn't had a MAF CEL in 2 years. Sure it's a hack fix, but it should have been designed in...good luck on your fix...

[Bigglezworth]

Sure it's a hack fix, but it should have been designed in...

Exactly! What the hell were they thinking (or not thinking in this case...).

[RSoverAll]

If you already logged and didn't see over 300 g/s, check for leaks before you log again. Likely your MAFS are leaking between the MAFs and intake. Push down on your airbox and make sure it is fully seated. I've eliminated this problem by removing my MAFs from the airbox, and let them sit in the intake. So IF they leak, they leak before the MAF. They MAY suck unfiltered air, but not enough to matter and I hadn't had a MAF CEL in 2 years. Sure it's a hack fix, but it should have been designed in...good luck on your fix...

The airbox connection was one of the first things I checked, it was all good but I went ahead and installed the Apikol Maf Rings right after I bought the car just as insurance. Possibility the Mafs are on their way out... They are Genuine Audi pieces I believe.

[ttboost]

The OTHER benefit to the "MAF mod", is that you minimize your engagement of the MAF connectors and the associated wiring, which is brittle and tend to break. Make sure to check that wiring at the connectors and within 3-4in of the connectors. Even with the Apikol rings, they can and will leak. That's why they are not worth $50. Just my opinion... as this is what worked for me. Again, no CEL's for over 2 years, which is unheard of for an Audi, much less a RS6...

[RSoverAll]

Kinda wish the cel was on so I would have more of a clue.

I did capture the logs yesterday but getting them to fit the 30k character limit is a challenge w/o chopping too much of the important data.

[lswing]

Kinda wish the cel was on so I would have more of a clue.

I did capture the logs yesterday but getting them to fit the 30k character limit is a challenge w/o chopping too much of the important data.

Yep, it's a pain, just trim out all the duplicate columns. We just need to see one run from 2500-6500. Really just need rpm, timing, lambda/O2, specified and actual boost. So no soft codes either on a scan eh (ones that don't throw a CEL)? Stuff like a small boost or vacuum leak won't always trigger a CEL.

[RSoverAll]

Engine Speed	Ignition	Lambda Control	Lambda Control	Boost Pressure	Boost Pressure
(G28)	Timing Angle	Bank 1 (actual)	Bank 2 (actual)	(specified)	(actual)
/min	°BTDC	V	V	mbar	mbar
2640	22.5	0.83	0.86	1140	1240
2640	15	0.83	0.86	1140	1240
2680	22.5	0.83	0.86	1140	1240
2720	21.8	0.83	0.865	1140	1240
2760	20.3	0.835	0.86	1140	1240
2760	17.3	0.83	0.855	1140	1240
2800	24	0.83	0.86	1150	1240
2800	24.8	0.83	0.86	1150	1240
2840	24	0.83	0.86	1170	1240
2880	18.8	0.83	0.86	1190	1240
2920	18.8	0.83	0.86	1190	1240
2960	23.3	0.83	0.86	1200	1240
2960	19.5	0.825	0.86	1200	1240
3000	20.3	0.825	0.86	1210	1250
3040	23.3	0.83	0.86	1210	1240
3080	23.3	0.835	0.86	1230	1250
3080	23.3	0.835	0.86	1240	1250
3120	23.3	0.83	0.86	1240	1250
3160	22.5	0.83	0.86	1250	1250
3200	21.8	0.835	0.86	1250	1250
3200	22.5	0.835	0.86	1250	1250
3240	22.5	0.84	0.86	1260	1250
3280	18.8	0.83	0.86	1260	1250
3320	18	0.835	0.86	1270	1250
3320	18	0.83	0.86	1270	1260
3360	21.8	0.835	0.86	1280	1250
3400	21	0.83	0.86	1280	1260
3440	22.5	0.835	0.86	1280	1260
3440	19.5	0.83	0.86	1300	1260
3480	21.8	0.835	0.86	1290	1260
3520	19.5	0.83	0.86	1280	1250
3560	21.8	0.83	0.86	1280	1260
3600	18.8	0.835	0.86	1280	1260
3640	21.8	0.835	0.86	1280	1260
3680	19.5	0.84	0.86	1290	1260
3680	19.5	0.84	0.855	1290	1260
3720	21.8	0.835	0.855	1300	1270
3760	21	0.84	0.86	1290	1270
3800	21	0.835	0.86	1300	1280
3840	21	0.835	0.86	1290	1270
3880	16.5	0.83	0.86	1290	1280
3920	21	0.83	0.86	1290	1280
3960	21	0.835	0.86	1300	1280
4000	20.3	0.83	0.86	1300	1280
4000	21	0.83	0.86	1270	1290
4040	16.5	0.83	0.855	1270	1280
4080	15.8	0.83	0.855	1270	1280
4120	15	0.83	0.86	1280	1280
4160	15	0.84	0.855	1280	1280
4200	15	0.835	0.86	1280	1280
4200	15	0.835	0.855	1290	1280
4240	18.8	0.835	0.86	1290	1280
4280	15	0.835	0.855	1300	1280
4320	17.3	0.835	0.85	1300	1280
4360	18	0.835	0.86	1300	1270
4360	14.3	0.84	0.86	1320	1280
4400	15	0.835	0.855	1320	1280
4440	17.3	0.84	0.855	1320	1290
4480	15	0.835	0.85	1330	1280
4480	16.5	0.84	0.85	1330	1300
4520	17.3	0.835	0.855	1330	1310
4560	14.3	0.835	0.855	1330	1310
4600	17.3	0.83	0.855	1330	1320
4600	13.5	0.83	0.85	1330	1320
4680	16.5	0.825	0.855	1330	1320
4720	16.5	0.825	0.86	1320	1330
4720	16.5	0.83	0.855	1310	1330
4760	15.8	0.825	0.855	1300	1330
4800	11.3	0.825	0.855	1290	1320
4840	17.3	0.825	0.86	1290	1310
4880	17.3	0.825	0.865	1280	1310
4880	17.3	0.83	0.86	1270	1300
4920	17.3	0.835	0.86	1260	1290
4960	12	0.835	0.865	1260	1280
5000	18	0.83	0.865	1250	1280

[RSoverAll]

5040	16.5	0.84	0.865	1250	1280
5080	13.5	0.835	0.86	1250	1260
5080	16.5	0.84	0.865	1240	1260
5120	12.8	0.845	0.875	1240	1240
5160	12.8	0.845	0.865	1240	1230
5200	15	0.84	0.86	1240	1230
5240	15	0.84	0.865	1240	1220
5280	12.8	0.845	0.86	1240	1220
5320	13.5	0.84	0.86	1230	1230
5360	12.8	0.84	0.865	1230	1220
5360	15.8	0.84	0.86	1230	1230
5400	13.5	0.83	0.86	1230	1230
5440	14.3	0.84	0.86	1230	1230
5480	13.5	0.835	0.86	1230	1230
5520	12.8	0.84	0.86	1230	1240
5520	16.5	0.835	0.86	1230	1230
5560	17.3	0.84	0.865	1230	1230
5600	15.8	0.835	0.86	1230	1230
5640	18	0.84	0.86	1230	1220
5680	13.5	0.83	0.86	1240	1220
5680	15.8	0.835	0.86	1240	1220
5720	16.5	0.835	0.86	1240	1220
5760	19.5	0.83	0.86	1240	1220
5800	18.8	0.83	0.86	1240	1230
5800	19.5	0.83	0.86	1250	1240
5840	18.8	0.83	0.86	1250	1250
5880	19.5	0.83	0.86	1250	1270
5920	19.5	0.825	0.86	1250	1270
5960	18.8	0.83	0.86	1250	1270
6000	18	0.835	0.86	1250	1260
6040	21.8	0.83	0.86	1250	1250
6040	18.8	0.83	0.86	1260	1260
6080	22.5	0.82	0.86	1260	1230
6080	19.5	0.825	0.86	1260	1220
6120	19.5	0.825	0.86	1250	1210
6120	5.3	0.825	0.86	960	1240
6120	2.3	0.835	0.865	960	1240

[RSoverAll]

No soft codes when I did the auto-scan yesterday, Iswing.

[lswing]

I should have added throttle angle to be included, but we'll assume you're at 100% for this.

You have no boost, car is in limp mode I assume. Stock boost is around 1600 mbar, with the readings starting around 1000. So you're only boosting around 4-5psi, when stock is around 8-9psi.

You're timing is just fine, along with the lambda readings.

I think you want to do the redneck reset and see if your boost comes back? Dave confirm process?

Are you tuned or not? Either way, you have no boost for some reason. Doesn't appear to be any boost leak as your actual boost catches up to the specified just fine.

So maybe a large amount of unmetered air getting in? Others will weigh in more I'm sure...

[DHall1]

Reset then report the new log please

[RSoverAll]

I should have added throttle angle to be included, but we'll assume you're at 100% for this.

You have no boost, car is in limp mode I assume. Stock boost is around 1600 mbar, with the readings starting around 1000. So you're only boosting around 4-5psi, when stock is around 8-9psi.

You're timing is just fine, along with the lambda readings.

I think you want to do the redneck reset and see if your boost comes back? Dave confirm process?

Are you tuned or not? Either way, you have no boost for some reason. Doesn't appear to be any boost leak as your actual boost catches up to the specified just fine.

So maybe a large amount of unmetered air getting in? Others will weigh in more I'm sure...

No tune yet...

[lswing]

No tune yet...

So it was slow, now even slower Kidding aside, did this happen out of the blue? I take back my unmetered air thought as you should be running lean if that's the case. Let's see if it comes back to stock at least after you reset. No boosting until you log or you risk just going back into limp mode.