Audi TT dropping boost with Revo software on higer gears

[stefa]

Hi,

1st post here to look for help with really mystical boost problem:

I have Audi TT225 quattro year model 2000. ECU number is 8L0 906 018 M. Revotechnik software was installed to my car 1 week ago. After SW installation car builds up boost really nicely with gears 1-2-3 but with gears 4-5-6 there is a huge boost drop at 3000 rpm from 1.4bar to 0.6 bar. This happends allways with big gears no matter if throttle is opened at 1000 rpm or 2500 rpm. Once it passes 3000 rpm boost drops to 0.6bar and builds up slowly and then its running OK again at 5000rpm. Look at attached boost pressure charts witch show boost on 3 and 5 gear. This behaviour happends same way EACH time 3000 rpm is passed on high gears with boost more than 0,7bar.

I have debuged the issue with following VAG-COM measurement block data log files. It seems to me that Revo software is asking for some reason less boost after 3000rpm on higher gears (look at boost data difference on logfile with 3 and 5 gear)

Gear 3:

Group C: '115
RPM Load Absolute Pres. Absolute Pres.
TIME
STAMP /min % mbar mbar
0.00 1680 90.2 1710.0 1160.0
0.90 1960 103.0 2070.0 1300.0
1.81 2400 134.6 2250.0 1570.0
2.70 2920 191.7 2440.0 2300.0
3.61 3600 191.7 2400.0 2450.0
4.51 4320 191.7 2330.0 2400.0
5.41 5000 191.7 2180.0 2300.0
6.31 5560 180.5 2010.0 2130.0
7.21 6080 163.9 1890.0 2020.0


'002
RPM Load Inj. On Time Mass Flow

/min % ms g/s
1880 97.0 9.43 36.31
2240 120.3 11.89 54.89
2720 176.7 17.22 100.28
3360 191.7 20.50 128.53
4120 191.7 20.50 158.11
4800 191.7 20.91 184.08
5400 187.2 19.68 191.42
5880 169.2 17.63 190.86
6360 151.9 16.40 181.58


Gear 5:

Group C: '115
RPM Load Absolute Pres. Absolute Pres.
TIME
STAMP /min % mbar mbar
0.60 1640 96.2 1700.0 1260.0
1.50 1720 100.0 1790.0 1320.0
2.40 1880 106.8 1920.0 1390.0
3.30 2000 116.5 2070.0 1500.0
4.21 2160 136.8 2160.0 1680.0
5.10 2320 178.2 2210.0 2060.0
6.00 2560 177.4 2330.0 2380.0
6.91 2760 181.2 2360.0 2370.0
7.80 3000 169.2 1920.0 2360.0
8.71 3160 132.3 1750.0 1610.0
9.61 3320 127.8 1730.0 1620.0
10.51 3480 130.1 1720.0 1640.0
11.40 3640 130.8 1710.0 1640.0
12.30 3760 133.1 1720.0 1650.0
13.20 3920 137.6 1740.0 1680.0
14.10 4080 139.1 1750.0 1700.0
15.00 4200 141.4 1750.0 1700.0
15.90 4360 138.3 1750.0 1680.0
16.80 4480 140.6 1750.0 1680.0
17.70 4640 146.6 1770.0 1730.0
18.60 4760 151.1 1790.0 1780.0
19.50 4920 149.6 1790.0 1750.0
20.40 5040 159.4 1960.0 1870.0
21.30 5200 184.2 2090.0 2150.0
22.20 5360 182.7 2040.0 2150.0
23.10 5520 176.7 2000.0 2100.0
24.00 5640 171.4 1970.0 2060.0
24.90 5760 166.9 1920.0 2010.0
25.80 5880 163.2 1910.0 1950.0
26.69 6000 157.9 1890.0 1960.0


'002
RPM Load Inj. On Time Mass Flow

/min % ms g/s
1600 94.7 9.43 29.42
1720 97.7 9.43 33.11
1840 104.5 10.25 37.11
1960 113.5 11.07 43.08
2080 128.6 12.30 53.97
2280 162.4 15.99 74.50
2480 191.7 19.68 89.75
2720 185.7 18.86 97.25
2920 187.2 19.27 107.58
3120 112.0 11.89 69.56
3280 130.1 12.71 83.47
3440 131.6 12.71 86.75
3560 130.8 12.71 89.72
3720 131.6 13.12 94.39
3880 136.8 13.94 101.72
4000 139.1 14.35 108.11
4160 140.6 14.76 112.42
4320 139.1 14.76 114.67
4440 139.8 14.76 119.67
4560 145.1 15.58 128.11
4720 148.9 15.99 134.72
4840 148.9 15.58 136.11
5000 158.6 16.81 151.81
5160 178.9 18.86 181.67
5320 185.7 19.27 189.28
5480 180.5 18.86 189.75
5600 172.9 18.45 186.14
5760 169.2 18.04 186.75
5840 163.2 17.22 183.33
5960 159.4 17.22 181.19


I have changed following parts to eliminate other possible faulting parts before this:

- N75 valve (installed new original= F-model)
- Motor temperature sensor (installed new green original model)
- Spark plugs (installed new originals)
- Air filter (installed new original)

These part changes have not affected the cars behaviour. There is no alarms in VAG-COM.

So what do you guys think about this? Is there a bug in Revo SW on higer gear boost charts or is some sensor sending false information to SW to make false boost peressure reguests at higher gears?

 

[Wilko]

I would log block 20, and intake air tamp.
The EMS is pulling the boost back, as it's picking something up on one of the sensors.

 

[stefa]

Here is log data on 020:

Gear 3:

Tuesday 07 March 2006 12:02:15
8L0 906 018 M 1.8L R4/5VT G 0002

Group A: '020
Idle Stabilization Idle Stabilization Idle Stabilization Idle Stabilization
TIME
Marker STAMP CF CF CF CF
0.30 0.0 0.0 0.0 0.0
1.20 0.0 0.0 0.0 0.0
2.10 0.0 0.0 0.0 0.0
3.01 0.0 0.0 0.0 0.0
3.91 0.0 0.0 0.0 0.0
4.81 0.0 0.0 0.0 0.0
5.71 0.0 0.0 0.0 0.0
6.61 0.0 0.0 0.0 0.0
7.51 0.0 0.0 0.0 0.0

Gear 5:

Tuesday 07 March 2006 12:07:23
8L0 906 018 M 1.8L R4/5VT G 0002

Group A: '020
Idle Stabilization Idle Stabilization Idle Stabilization Idle Stabilization
TIME
Marker STAMP CF CF CF CF
0.00 0.0 0.0 0.0 0.0
0.90 0.0 0.0 0.0 0.0
1.81 0.0 0.0 0.0 0.0
2.70 0.0 0.0 0.0 0.0
3.60 0.0 0.0 2.3 0.0
4.50 0.0 0.0 2.3 0.0
5.40 0.0 0.0 1.5 0.0
6.31 0.0 0.0 0.8 0.0
7.21 0.0 0.0 0.8 0.0
8.11 0.0 0.0 0.8 0.0
9.01 0.0 0.0 0.8 0.0
9.91 0.0 0.0 0.0 0.0
10.80 0.0 0.0 0.0 0.0
11.70 0.0 0.0 0.0 0.0
12.60 3.0 0.0 0.0 0.0
13.50 3.0 0.0 0.0 0.0
14.40 3.0 0.0 0.0 0.0
15.30 2.3 0.0 0.0 0.0
16.20 2.3 0.0 0.0 0.0
17.10 2.3 0.0 0.0 0.0
18.00 2.3 0.0 0.0 0.0
18.90 1.5 0.0 0.0 0.0
19.80 1.5 0.0 0.0 0.0
20.70 1.5 0.0 0.0 0.0
21.60 0.8 0.0 0.0 0.0
22.50 0.8 0.0 0.0 0.0
23.40 0.8 0.0 0.0 0.0
24.30 0.0 0.0 0.0 0.0
25.20 0.0 0.0 0.0 0.0
26.09 0.0 0.0 0.0 0.0


Group 118 data on gear 5:
(It was -20 degrees yeasturday morning when this was done. Car was dirven until it was warm and then it itled for 1 min before start of the measurement)


Wednesday 8 March 2006 7:38:47
8L0 906 018 M 1,8L R4/5VT G 0002

Group A: '118
RPM Temperature Load Absolute Pres,
TIME
Marker STAMP /min °C % mbar
0,26 1720 -10 95 1010
0,56 1720 -11 95 1080
0,86 1760 -12 95 1150
1,16 1800 -12 95 1220
1,46 1840 -12 95 1290
1,76 1880 -13 95 1350
2,06 1920 -14 95 1410
2,36 1960 -15 95 1470
2,66 2000 -15 95 1540
2,96 2040 -15 95 1620
3,26 2120 -15 95 1720
3,56 2160 -15 95 1840
3,86 2240 -15 84 2020
4,16 2320 -15 77 2250
4,46 2400 -15 73 2360
4,76 2440 -15 72 2310
5,06 2520 -15 73 2250
5,36 2600 -16 73 2240
5,66 2680 -16 73 2280
5,96 2760 -16 73 2300
6,26 2840 -16 73 2270
6,56 2920 -16 73 2280
6,86 3000 -16 66 2280
7,16 3040 -16 56 2120
7,46 3080 -17 51 1850 !!
7,76 3120 -17 49 1640 !!
8,06 3160 -17 44 1610
8,36 3240 -16 46 1610
8,66 3280 -16 46 1600
8,96 3320 -16 46 1600
9,26 3360 -15 48 1600
9,56 3400 -15 48 1620
9,86 3480 -15 48 1630
10,16 3520 -15 45 1630
10,46 3560 -15 47 1630
10,76 3600 -15 44 1640
11,06 3680 -15 47 1640
11,36 3720 -15 47 1640
11,66 3760 -15 47 1650
11,96 3840 -15 48 1660
12,26 3880 -15 48 1670
12,56 3920 -15 48 1680
12,86 3960 -15 46 1680
13,16 4040 -15 50 1690
13,46 4080 -14 46 1690
13,76 4120 -14 43 1690
14,06 4160 -14 45 1680
14,36 4240 -14 45 1680
14,66 4280 -14 44 1700
14,96 4320 -13 46 1700
15,26 4360 -13 46 1710
15,56 4440 -13 46 1720
15,86 4480 -13 45 1730
16,16 4520 -12 45 1730
16,46 4560 -12 45 1740
16,76 4640 -12 45 1750
17,06 4680 -12 45 1750
17,36 4720 -12 44 1760
17,66 4760 -12 44 1760
17,96 4800 -12 45 1770
18,26 4840 -12 45 1780
18,56 4920 -12 44 1780
18,86 4960 -11 44 1790
19,16 5000 -11 44 1790
19,46 5040 -11 45 1800
19,76 5080 -10 66 1810
20,06 5120 -10 69 1920
20,36 5200 -10 68 2060
20,66 5240 -9 68 2130
20,96 5320 -9 68 2130
21,25 5320 -9 66 2120
21,55 5400 -9 66 2100
21,85 5440 -9 65 2080
22,15 5480 -9 64 2050
22,45 5520 -8 63 2010
22,75 5560 -7 64 1940
23,05 5600 -7 67 1740
23,35 5600 -7 65 1630


Any ideas what is wrong based on this data??

 

[ibizacupra]

do you have an SPS3 unit to try adjusting up and down to see if the request tracks up and down with it?

 

[Deleted member 7729]

Mate of mine had a similar problem. By the name of chimp..

http://www.ttforum.co.uk/ttforumbbs/viewtopic.php?t=7221&highlight=

He had Revo removed and a refund in the end. It was to do with his particular revision of ECU or something. I know the Revo boys had his car quite a bit and JKM looked at it too. Once the Revo was removed car was perfect again.

He's getting a new R32 in a few weeks.. I'm not convinced on them..

 

[flashbsd]

i had a similar problem until lately, i had revo reflashed and all is fine now!

 

[Revo Kev]

Mate of mine had a similar problem. By the name of chimp..

http://www.ttforum.co.uk/ttforumbbs/viewtopic.php?t=7221&highlight=QUOTE]

That link is to info that's over two years old, we've had numerous software updates since then. It's a completely different thing anyway!

 

[Deleted member 7729]

Mate of mine had a similar problem. By the name of chimp..

http://www.ttforum.co.uk/ttforumbbs/viewtopic.php?t=7221&highlight=QUOTE]

That link is to info that's over two years old, we've had numerous software updates since then. It's a completely different thing anyway!

No worries, but it sounded very similar to what Mike had. I wasn't stating an answer, just a pointer, not saying I'm right or wrong..

I've got Revo on my Cupra with no probs (appart from twats driving into me.)

 

[Simon L]

I have a similar issue with my Ibiza with a Star Remap, the boost peaks, dips and peaks again.

 

[Wilko]

It's requesting the right amount of boost in third, but in 5th the boost request is reduced significantly.
maybe manifold temps of -15 have something to do with it? or maybe a slipping clutch?

 

[stefa]

Hi,

THX for advice guys!

I believe its not related to temp. All the same function if it is -20 or zero. Warmer than that it has not been here..

At least I do not feel any clutch slippage.

Could reflash do something for this? I think there would be some more serious signs of mailfunction if it was needed? Could it be something with ECU version being not totally compatible with installed Revo SW wersio etc. wrong version of Revo SW installed?

 

[flashbsd]

i had EEPROM errors on vag-com after a battery off reset,

 

[m0rk]

where are you if it's -20?

 

[stefa]

I am in Finland.

 

[stefa]

i had a similar problem until lately, i had revo reflashed and all is fine now!

Could you tell more about what kind of problem you had and what was done?