Car not right (as usual)

[flashyg]

Can any one help?

Lots of logs on the fats discussion

1 why would my WOT fail to hit 100% until 3700rpm having fully opened at 2000rpm?

2 No boost leaks but lambdas reading -7. What could be causing this?

performance is not as it should be and I am well and truly , well not happy to put it mildly.

I cant get to mrc till next month.

Thanks for your help G

post in fats discussion

time rpm maf throttle timing.

18.1 2200 23.89 9.4 36
18.4 2240 32.86 12.5 31.5
18.7 2240 34.47 12.9 32.3
19.01 2280 37.06 13.7 33
19.31 2320 38.94 14.1 33
19.61 2360 39.36 14.5 33
19.91 2400 41.72 14.9 33
20.21 2480 56.28 20.4 32.3
20.51 2520 68.69 29.8 29.3
20.82 2640 83.44 83.5 24.8
21.12 2720 96.64 84.3 21.8
21.42 2840 112.03 87.1 19.5
21.72 3000 130.64 89.8 18
22.02 3120 151.42 92.9 15.8
22.32 3320 179.56 96.1 12.8
22.64 3480 205.72 99.2 11.3
22.93 3720 228.92 100 10.5
23.23 3920 238.06 100 10.5
23.55 4120 253.89 100 11.3
23.85 4320 260.14 100 9
24.16 4520 269.61 100 12.8
24.49 4720 276.5 100 12.8
24.82 4960 289.42 100 12.8
25.16 5120 286.86 100 12.8
25.5 5360 282.47 100 12
25.85 5560 295.25 100 12.8
26.21 5760 311.19 100 10.5
26.57 5920 315.25 100 10.5
26.94 6160 333.81 100 14.3
27.32 6360 328.94 100 13.5
27.7 6560 334.78 100 18
28.07 6680 343.67 100 18
28.45 6880 347.69 100 14.3
28.83 7040 352.78 100 14.3

more fats logs.
I am very concerned. It may be my petrol so I will use a different supplier.
But I am puzzled.

Basically I am at WOT from 2k rpm but the logs show 100% at 3700.
Why is this is it bad fuel or is my TB Broken.
I re set it but it barley changed anything.

My fats are not good. My maf readings are not what they should be.
Maf and dvs are brand new boost if fine.

logged the cfs here are the results
1234.
0 3 0 0
0 3 0 0
0 3 0 0
0 3 0 0
0 3 0 0
0 3 0 0
0 0 0 0
0 0 0 0
0 0.8 0 0
0 3.8 0 3
0 3.8 0 3
0 3.8 0 3
0 3.8 0 3
0 3.8 0 3
0 0 0 0
then 5 and 6

0 3
0 3
0 3
0 3
0 3
0 3
0 3
0 2.3
0 4.5
0 4.5
0 4.5
0 4.5
0 4.5
0 4.5
3 4.5
3 3.8
3 3.8
3 3.8
3 3.8
3 3.8
3 3.8
2.3 3
2.3 3
2.3 3
1.5 2.3
1.5 2.3
1.5 2.3
0.8 1.5
0 0
0 0
1.5 1.5
1.5 1.5
0 0
0 0
car is running -7 and -6 on lambdas but no boost leaks.
logged the egts not over 945 consistently.
absolutely no engine fault codes.
Car did pull 191% load and 364 maf from 6000 on words when running right.
Cannot understand reasons behind the drop , and poor fats,
Can any one help.



Thanks .
G

[S2tuner]

WOT is normal, the throttle is not supposed to be 100% open until 3500 RPM on an RS4.

[Nige_RS4]

Gordon, here is an extract from one of my FATS runs;

time rpm maf wot timing
595.73 3200 117.03 100 25.5
596.33 3520 198.08 100 15
596.93 3960 227.5 100 7.5
597.55 4360 243.36 100 12
598.2 4800 273.83 100 15
598.87 5240 294.58 100 12.8
599.58 5720 314.58 100 15
600.31 6200 324.17 100 18
601.07 6600 348.72 100 21
601.82 7000 270.19 38.4 10.5

You can see that it was logging 100% WOT from 3200 rpm - just to confuse things!

[flashyg]

Thanks Nige
Thanks Mihnea.

Any suggestions.
Maybe if I Log Block 2 this will show Injection timing which may show up a fuel pressure issue?
does fuel look OK?

Thanks guys I am so fed up with it.
You know what it is like constant effort cleaning fettering repairs but when you can identify the problem you want to

[Nige_RS4]

Have you tried disconnecting your ECU, the reconnecting it - clear the usual power disconnected at pin XX code and re-calibrate your TB.

Are you calibrating via vag-com, following the ross-tech procedure ... http://www.ross-tech.com/vag-com/cars/audiB5.html

HTH

[flashyg]

Nige thanks for the support but Yes I have followed this. I will disconnect the ECU.
I think My issues must be related to the -7 s on the lambda control.
The cause is so hard for me to discover. Car has smelt like it is rich for quite some time now. What Can you do?

I am fresh out of ideas?

Any help appreciated I will re do ecu and maybe run stock. So sad. What else can I do!!! Cars can Hurt.

Help Appreciated.
G

[S2tuner]

Nige's throttle opens 100% from 2000 RPM because I've programmed it so it does that, Gordon's is MTM and this is why it doesn't open below 3500 (stock programming for throttle max opening).

HTH,

Mihnea

[flashyg]

Thanks Guys so so that explains that. Good to know this is normal.

Stupid as it may seem Ive got a cunning plan.

Next effort will be spark plugs.
I say stupid as I realise now I should have tried this before hand.
I had them changed 14k previously, spoke today with the mechanic he assured me they were changed but I feel this could be the cause of rich running.

Mihnea Nige what do you think , waste of time and money or good idea?

On the subject are the Bosch ones the same as the NGK and just as good, dealer sells NGK German Swedish sells Bosch half the price?

G


PS just thought I would share this with you, its a video taken of me whilst doing some logs on my own, u know how it is on the laptop whilst driving.

http://videos.streetfire.net/toprated/0 ... 8DB45F.htm

[flashyg]

OK new idea, could it be fuel pressure regulator?

[flashyg]

great news. my car is still pissi*g me off.
Changed fuel pressure reg . Now lambdas are not trimming to compensate for this component working out side its perfect position.

Lambdas went to -0.40 -0.8 - 0.2 -3.1 on a good boosted run.

when the car is revved gently and not boosted the part throttle readings adjust to -1ish

When re boosted the bank 2 readings go back up to -3 .

Got a crank case gasket leak for sure and oily film on bank 2 turbo side so this may be causing a slight loss.

Had gasket replaced 2months ago so having it re done.

This does not explain the considerable drop in performance figures I fell I am getting through nor the knocks on the knock sensors but at least I cam see more now the lambdas are just trimming for fuel correction and not a sloppy fuel regulator.


here are the knocks.
Strangely they occupy the 2 rear cylinders on both sides mostly.

logs knocking 3rd 4th 5th 27/6/06 25.c
25.65 0 0 0 0 25.34 1.5 0
26.27 0 0 0 0 25.96 0.8 0
26.93 0 0 0 0 26.59 0.8 3
27.61 0 0.8 0 0 27.26 1.5 0
28.32 0 0.8 0 0 27.96 0.8 0
29.05 0 0.8 0 0 28.68 0.8 0
29.81 0 0 0 0 29.43 0.8 0
30.52 0 0 0 0 30.17 0 0
31.18 0 0 0 0 30.85 0 0
31.84 0 0 0 0 31.51 0 0
32.49 0 0 0 0 32.16 0 0
33.13 0 0 0 0 32.81 0 0
33.78 0 0 0 0 33.45 0 0
34.42 0 0 0 0 34.1 0 0
35.07 0 0 0 0 34.74 1.5 3
35.74 0 0 0 0 35.4 1.5 4.5
36.43 0 0 0 0 36.08 1.5 4.5
37.13 0 3 0 0 36.78 0.8 4.5
37.85 0 3 0 0 37.49 0.8 3.8
38.58 0 3 0 0 38.21 0 3.8
39.33 0 2.3 0 0 38.95 0 3.8
40.08 0 0 0 0 39.71 3 3
40.77 0 1.5 0 0 40.43 0 0
41.45 0 1.5 0 0 41.11 0 3
42.13 0 1.5 0 0 41.79 3 3
42.83 0 0.8 0 0 42.48 3 3
43.53 0 0.8 0 0 43.18 3 3
44.23 0 3 3 0 43.88 2.3 2.3
44.95 0 3 3 0 44.59 2.3 1.5
45.67 0 3 3 0 45.31 2.3 1.5
46.4 0 2.3 2.3 0 46.03 2.3 1.5
47.13 0 0 0 0 46.76 1.5 1.5
47.83 0 0 0 0 47.49 0 0
48.49 0 0 0 0 48.16 0 0

Is this because these are extra hot , get more direct boost, is this most common in 25c temps.

As a result of the knocks mt Btdc timing is all over the show whilst on proper fuel, optimx.
example 1
145.96 5640 299.64 100 9
146.32 5800 304.92 100 11.3
146.69 5920 316.67 100 9
147.05 6040 319.47 100 9.8

example 2
55.84 3360 204.17 96.1 11.3
56.15 3560 223.36 100 12
56.45 3800 234.22 100 12
56.77 4000 239.33 100 12.8
57.07 4240 253.89 100 13.5
57.4 4440 270.69 100 14.3
57.73 4680 283.72 100 14.3
58.06 4920 292 100 15
58.41 5160 303.81 100 14.3
58.76 5360 299.83 100 13.5
59.12 5600 309.17 100 13.5
59.48 5800 320.14 100 15
59.86 6040 327.25 100 14.3
60.23 6240 332.81 100 15
60.61 6400 337.69 100 13.5
60.99 6640 342.67 100 19.5


in the past same fuel here was the story great timing building nicely and decent maf readings
574.11 4880 304.5 100 15.8
574.44 5120 305.83 100 16.5
574.79 5360 313.89 100 15.8
575.14 5640 326.06 100 15.8
575.5 5840 337.69 100 16.5
575.87 6120 345.69 100 17.3
576.25 6360 349.72 100 19.5
576.62 6560 363.19 100 21.8
577 6800 364.08 100 22.5
So my problem appears to be knocking on back cylinders then retarding possible small leak on bank 2 gasket and turbo. Hot weather not helping 25 - 30c

Does this add up to a loss of apx 50hp.?
Or tiny leak on gasket no issue , heat no issue , knocking will kill off this power quite easily?

Thanks g

[flashyg]

Things moving on now, I'm off my food and totally obsessed! Whats new?

changed to 99 tesco still got retarding si its not fuel

99 tesco today
68.99 0 0 0 0 69.29 0 0
69.6 0 0 0 0 69.91 1.5 0
70.26 0 0.8 0 0 70.64 0 0
71.02 0 0 0 0 71.39 0 0
71.73 0 0 0 0 72.04 0 0
72.37 0 0 0 0 72.69 1.5 3
73.03 0 1.5 0 0 73.38 0 3
73.75 0 1.5 0 0 74.13 3 3
74.51 3 0.8 0 0 74.88 0 0
75.26 0 0 0 0 75.6 0 0
75.94 0 1.5 0 0 76.29 3 3
76.64 0 1.5 0 0 77 3 3
77.37 0 4.5 0 0 77.74 3 3
78.12 0 4.5 0 0 78.5 2.3 2.3
78.87 0 4.5 0 3 79.25 2.3 5.3
79.63 0 0 0 0 79.98 0 0
80.33 0 1.5 0 0 80.69 4.5 3
81.05 0 1.5 0 0 81.41 4.5 3
81.77 0 1.5 0 0 82.14 4.5 3
82.52 0 4.5 0 0 82.89 4.5 2.3
83.27 0 4.5 0 0 83.64 3.8 2.3
84.02 0 4.5 0 0 84.4 3 2.3
84.78 3 3.8 3 3 85.15 3 1.5
85.53 0 0 0 0 85.89 0 0
86.24 0 1.5 3 3 86.59 0 0
86.93 0 1.5 3 3 87.27 0 0
87.61 0 0 0 0 87.94 0 0
also an 003 log with tescos finest shows retarding out side temps 27c intakes 37-40
192.7 3680 185.31 100 15
193 3840 225.42 100 11.3
193.29 4040 235.06 100 8.3
193.61 4280 252.19 100 11.3
193.91 4480 258.44 100 12
194.24 4720 276.28 100 12
194.57 4920 286.86 100 12.8
194.91 5160 290.08 100 12.8
195.25 5360 278.33 100 11.3
195.6 5600 289.42 100 12.8
195.96 5840 310.53 100 9
196.33 6000 317.58 100 11.3
196.7 6240 319.47 100 12.8
197.08 6440 331.58 100 17.3
197.46 6640 328.94 100 19.5
197.83 6840 337.69 100 17.3
and again

222.93 4480 140.92 100 28.5
223.24 4600 229.47 100 16.5
223.56 4800 289.42 100 8.3
223.9 5000 296.56 100 8.3
224.24 5240 302.5 100 10.5
224.59 5480 291.78 100 11.3
224.94 5680 309.17 100 10.5
225.3 5880 322.28 100 12
225.67 6160 326.56 100 10.5
226.05 6360 328.94 100 15.8
226.43 6600 335.72 100 15
I then decided to do 50% throttle to se the difference in timing this in essence is to show the car on lower boost not having timing issues, basic sense to some but experimental to me.

here timing is better
113.14 2560 65.08 29.4 27.8
113.44 2640 72.22 30.2 27
113.74 2800 82.72 31.4 24.8
114.04 2920 90 33.3 22.5
114.35 3120 97.67 39.6 23.3
114.66 3280 104.28 45.5 24
114.95 3440 110.39 47.1 24.8
115.26 3640 114.44 47.1 26.3
115.55 3840 120.94 47.5 26.3
115.87 4000 128.47 48.2 26.3
116.17 4200 136.19 49.4 24.8
116.48 4360 141.25 46.3 24.8
116.8 4560 153.25 47.5 24
117.12 4760 160.33 46.7 23.3
117.45 4960 166.53 45.9 23.3
117.79 5160 184.64 48.2 21
118.13 5360 180.81 55.3 20.3
118.49 5560 193.33 58 19.5
118.84 5760 201.72 54.9 20.3
119.21 5960 215.08 54.5 20.3
119.58 6200 218.39 51 18.8
119.95 6360 223.08 49.8 22.5
120.33 6560 228.58 51 22.5
120.71 6600 39 13.7 41.3
I am concerned that my issues are related to pcb valve so went to vag but they will not sell as a part you have to buy whole spider.


Any one else had this issue and found the valve on its own?

Thoughts appreciated.

[flashyg]

breather disconnected no better
509.57 3040 142.36 90.6 16.5
509.87 3200 169.72 93.7 12.8
510.17 3360 191.56 97.3 11.3
510.47 3600 217.72 100 10.5
510.78 3760 228.31 100 10.5
511.08 4000 232.5 100 11.3
511.39 4240 241.94 100 12.8
511.7 4440 260.72 100 13.5
512.02 4640 272.61 100 13.5
512.35 4840 283.11 100 13.5
512.68 5040 293.28 100 13.5
513.03 5280 285.61 100 10.5
513.37 5480 284.97 100 13.5
513.73 5680 301.17 100 13.5
514.09 5880 312.08 100 11.3
514.46 6080 318.53 100 12.8
514.83 6280 330.86 100 14.3
515.21 6480 333.81 100 14.3
515.58 6640 333.81 100 16.5
515.96 6880 344.67 100 19.5

cf 27c breather undone
3rd gear
143.76 0 3 0 0 144.09 3 4.5
144.43 0 3 0 0 144.77 2.3 3.8
145.11 0 3 0 3 145.46 2.3 3.8
145.81 3 2.3 0 3 146.16 2.3 3.8
146.52 3 2.3 3 3 146.88 4.5 3
147.25 3 2.3 3 3 147.61 4.5 3
147.98 3 1.5 3 2.3 148.35 0 0
148.72 0 0 0 0 149.08 0 0
4th 2 6k

185.34 0 2.3 0 2.3 185.69 2.3 2.3
186.06 0 2.3 0 2.3 186.43 2.3 2.3
186.8 0 2.3 0 2.3 187.18 1.5 1.5
187.56 0 0 0 0 187.9 0 0
188.24 0 3 0 2.3 188.58 3 5.3
188.93 0 2.3 0 5.3 189.28 5.3 5.3
189.64 3 2.3 0 5.3 189.99 5.3 5.3


got to the point of thinking its the weather.

when breather was disconnected there was no oil vapours from it , good news eh.

[flashyg]

still not right mrc for me please?
will send mail and get booked in.
G

[CliveH]

Any news Gordon? Have you logged anything since the weather's cooled down?

[flashyg]

Yes Clive still some issue just cant put my finger on.
Have a look at my latest post. You may have some suggestions I would appreciate.
Thanks G