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Discussion Starter · #1 ·
My R32 occasionally feels a little flat and I'm not sure how to about diagnosing this in VCDS.

I've checked the timing values in group 208/209 and 90/91? and they are well within spec.

No fault codes are logged other than the CAT efficiency from the rear oxygen sensors due to having a decat.

I'm wondering if the MAF is failing so I logged groups 002 and 003 in VCDS and correlated the MAF values against each other in EXCEL. I'm not sure if the values are calculated MAF and actual MAF (nor am I sure which one is which) as per other VAG engines and need to confirm if this is actually the case.

I've read that apparently any more than a 3% difference in values mean that the MAF is failing?

I've also read that there are fuel trim (or lambda trim) values stored somewhere and these can be used to diagnose vac leaks or other fuelling issues but don't have any resources detailing this.

I've attached below a general log with some worst case values picked out from the log and some general cruising data as an example. I have some power run data somewhere that I need to look out and correlate but think they are presently on the VCDS laptop:

022 906 032 CN MOTRONIC ME7.1.1G 0006

RPM Load Mass Flow Mass Flow
Group 2 Group 3
/min % g/s g/s % difference

Worse case values:
680 34.6 8.78 13.06 -32.77182236
720 36.1 13.22 9.11 45.11525796
2040 13.5 8.81 25.75 -65.78640777

General cruise data:
1720 39.1 22.22 23.36 -4.880136986
1760 39.8 23.53 24.89 -5.464041784
1800 39.8 25.14 24.94 0.801924619
1880 40.6 25.19 25.47 -1.099332548
1920 39.8 25.64 35.53 -27.83563186
2000 47.4 34.22 39.5 -13.36708861
2160 51.9 39.03 39.22 -0.484446711
2240 52.6 38.81 40.28 -3.649453823
2360 51.1 40.17 40.75 -1.423312883
2520 52.6 45.61 45.5 0.241758242
2600 54.1 46.86 47.31 -0.951173114
2720 52.6 46.97 48.44 -3.034682081
2840 53.4 50.06 66.86 -25.12713132
2960 63.9 59.11 55.69 6.141138445
3040 54.1 53.64 47.86 12.07689093
3040 27.1 16.31 14.28 14.21568627
2560 15.8 13.17 11.11 18.54185419
2040 13.5 8.81 25.75 -65.78640777
2040 28.6 27.08 14.19 90.83861875

Does anyone have any suggestions or links to resources outlining a decent method to diagnose for running issues?

I may also clean the TB and perform a TB alignment in the morning if that's likely to improve matters?

Any pointers or help would be greatly appreciated. Ta J
 

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Yessss!, Remap and a beer, answers most of lives riddles
 
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Yup, you dont wanna remap your car when your drunk, could add more problems rather than solving shit


remap it, take a step back and admire the good job you have done at fixing stuff.... have a beer
 

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In that case, just have a beer and forget about it til the morning


but seriously, like cheempeej says, clean the throttle body and see how it goes
 

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Discussion Starter · #14 ·
Just checked the tech bulletin for the 6463 update and my ECU PN and coding is in the affected range - 022 906 032 CN MOTRONIC ME7.1.1G 0006

Is the standard R32 ECU firmware speed limited? Can't say Ive had it over 130 on the private runway! I'm now a little suspicious?

What should a decatted remapped R32 put down at the wheels?
 

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G60Dub said:
Just checked the tech bulletin for the 6463 update and my ECU PN and coding is in the affected range - 022 906 032 CN MOTRONIC ME7.1.1G 0006

Is the standard R32 ECU firmware speed limited? Can't say Ive had it over 130 on the private runway! I'm now a little suspicious?

What should a decatted remapped R32 put down at the wheels?
It's not had the update then, motronic should end in 6463 hence the name. I don't think top end speeds have anything to do with it but it should be 246 from 241. It eliminates a flat spot
 

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Discussion Starter · #16 ·
Ah but if its been remapped a long time ago - basically the cars had the BFH in t from pretty much new so it may have been remapped with an earlier base firmware so I could go thinking its the firmware and shoot myself in the foot by having the remaqp flash overwitten with the 6463.
 

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G60Dub said:
Ah but if its been remapped a long time ago - basically the cars had the BFH in t from pretty much new so it may have been remapped with an earlier base firmware so I could go thinking its the firmware and shoot myself in the foot by having the remaqp flash overwitten with the 6463.
Why not take it to stage 2 then?

You can check with a dealer of it had the update. If the ecu map can't be read then it's likely mapped.
 

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Its definitely not had the 6463 update as the ECU code string is an earlier version: 022 906 032 CN MOTRONIC ME7.1.1G 0006

The 0006 would be 6463.

Good shout re the latter. Think I'll try n get some info from the previous owners on Eastside VW.
 

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Check that your variable changeover valve is operating properly. It may be stuck in the torque or power position instead of moving between the two at the relevant revs.

Check Engine Blocks 032 in vcds and post back here what your fuel trims are.
 
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G60Dub said:
Its definitely not had the 6463 update as the ECU code string is an earlier version: 022 906 032 CN MOTRONIC ME7.1.1G 0006

The 0006 would be 6463.

Good shout re the latter. Think I'll try n get some info from the previous owners on Eastside VW.
Yeah for sure, have you checked obvious stuff like filter? Plugs coilpacks?
 
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