LMM values too high!

Hello,

I would appreciate some help with analyzing my measurement data.
(Passat 35i 1Z)

Friday, October 11, 2002, 17:03:59.
028 906 021 B 1 9l R4 EDC SG D44

Group A: '003
Engine speed | MAF (specified) | MAF (actual) | EGR duty cycle
TIME 861-945 240-340 240-340 Apr 84
MARKER STAMP /min mg/R mg/R %
0.58 861 269.3 415.6 69.5
1.26 840 272.7 419 69.5
1.97 861 269.3 415.6 69.5
2.67 861 272.7 415.6 69.5
3.42 840 272.7 415.6 69.5
4.16 840 272.7 415.6 69.5
4.88 840 276 419 69.5
5.56 861 272.7 409 69.5
6.28 840 272.7 409 69.5
7.02 840 276 415.6 69.5
7.76 861 269.3 415.6 69.5
8.46 861 272.7 415.6 69.5
9.11 840 305.9 415.6 60.2
9.79 1911 149.6 462.2 36.7
10.56 2436 179.6 535.3 69.5
11.23 1344 522 535.3 52
11.97 1008 295.9 472.2 65.2
12.63 798 665 422.3 19.9
13.31 903 279.3 422.3 68.4
...
120.26 861 269.3 415.6 69.5
120.92 861 269.3 409 69.5
121.6 1260 628.4 365.8 43.4
122.29 1617 798 508.7 19.9
123.01 1323 691.6 492.1 19.9
123.67 1554 794.7 505.4 4.7
124.32 2100 847.9 665 4.7
125.05 2667 109.7 731.5 59.4
125.77 2226 847.9 651.7 4.7
126.46 1953 847.9 847.9 4.7
127.29 2205 847.9 847.9 4.7
127.87 2793 847.9 847.9 4.7
128.61 3108 847.9 827.9 4.7
129.27 3360 847.9 814.6 4.7
129.93 3591 847.9 794.7 4.7
130.61 3780 847.9 774.7 4.7
131.37 4032 808 758.1 4.7
132.03 3087 847.9 548.6 4.7
132.71 2562 847.9 847.9 4.7
133.45 2667 847.9 847.9 4.7
134.17 2730 847.9 847.9 4.7
134.89 2814 847.9 847.9 4.7
135.55 2898 821.3 844.6 4.7
136.27 2226 106.4 585.2 56.6


It would be nice if someone could share their opinion about these measurements.
would write. Is the LMM not okay now?

Sure, no problem.
David.

Hello David,

Your LMM is okay. The increased LMM actual values at idle are caused by an EGR valve that is not opening. The fact that the EGR valve is not deactivated by the control unit in this operating state can be seen by examining the duty cycle of the solenoid valve for the EGR system.
If your AGR valve is not intentionally defective, you should check the vacuum hoses for leaks to prevent dirt from entering the vacuum system.

Best regards, Rainer.

Thank you for the good news, Rainer!

And the AGR (Acoustic Reflecting Grille) intentionally broke (a small metal disc somehow got stuck in there ).