Logging Results: PD130

SL11CKK · Jun 29, 2013

So did some logging yesterday night of my 3rd and 4th gear from approx 2000rpm, and the results are in.

I logged channel 11, 03 and 10

Certain places it sort of spikes downwards, but please could you guys explain to me the results.

The Actual MAF reading is higher compared to the specified, however this could be due to the EGR bypass I have in place.

TIME	Engine speed	Spec. intake press.	Actual intake press.	D.cycle MAP	STAMP	Engine speed	MAF (specified)	MAF (actual)	EGR duty cycle	TIME	MAF	Atmos. pressure	Intake air press.	Throttle
0.72	1974	1632	1521	40.6	0.01	1932	555	764.4	84.5	0.36	749.7	1009.8	1509.3	40
1.8	2142	2295	2468.7	67.3	1.08	2016	850	1141.7	4.8	1.44	1249.5	1009.8	2316.6	100
2.82	2289	2325.6	2246.4	58.6	2.13	2184	850	1107.4	4.8	2.47	1136.8	1009.8	2223	100
3.9	2478	2346	2375.1	63.4	3.18	2352	850	1180.9	4.8	3.54	1205.4	1009.8	2328.3	100
4.98	2688	2346	2363.4	66.1	4.26	2541	850	1180.9	4.8	4.62	1166.2	1009.8	2363.4	100
6.06	2856	2346	2293.2	64.5	5.34	2751	850	1131.9	4.8	5.69	1107.4	1009.8	2304.9	100
7.14	3045	2346	2328.3	65.7	6.42	2940	850	1112.3	4.8	6.78	1127	1009.8	2316.6	94.5
8.22	3192	2346	2351.7	66.5	7.5	3108	850	1122.1	4.8	7.86	1122.1	1009.8	2351.7	83.1
9.3	3318	2121.6	2035.8	56.2	8.58	3255	830	1053.5	4.8	8.94	965.3	1009.8	2129.4	62.7
10.38	3402	2346	2304.9	67.7	9.66	3339	845	1161.3	4.8	10.02	1161.3	1009.8	2480.4	74.5
11.46	3486	2254.2	2316.6	68.5	10.74	3444	850	1063.3	4.8	11.1	1078	1009.8	2293.2	77.3
12.52	3549	2182.8	2375.1	79.7	11.82	3507	850	1097.6	4.8	12.18	1117.2	1009.8	2386.8	79.2
71.7	2058	2274.6	2433.6	65.7	72.05	2100	850	1166.2	4.8	72.41	1156.4	1009.8	2269.8	100
72.77	2205	2305.2	2258.1	58.6	73.13	2247	850	1195.6	4.8	73.49	1200.5	1009.8	2328.3	100
73.85	2352	2325.6	2351.7	63.8	74.21	2415	850	1215.2	4.8	74.57	1210.3	1009.8	2386.8	100
74.93	2520	2346	2386.8	66.1	75.29	2562	850	1146.6	4.8	75.65	1107.4	1009.8	2269.8	100
76.01	2667	2346	2246.4	62.2	76.37	2709	850	1122.1	4.8	76.73	1136.8	1009.8	2293.2	100
77.09	2814	2346	2316.6	63.4	77.45	2835	850	1136.8	4.8	77.81	1146.6	1009.8	2363.4	100
78.17	2940	2346	2363.4	65.7	78.53	2961	850	1136.8	4.8	78.89	1122.1	1009.8	2351.7	100
79.25	3045	2346	2351.7	67.3	79.61	3108	850	1107.4	4.8	79.97	1102.5	1009.8	2340	100
80.33	3171	2346	2351.7	67.7	80.69	3213	850	1107.4	4.8	81.05	1097.6	1009.8	2340	100
81.41	3276	2346	2328.3	66.1	81.77	3297	850	1087.8	4.8	82.13	1097.6	1009.8	2328.3	100
82.46	3381	2346	2340	66.5	82.81	3402	850	1102.5	4.8	83.16	1082.9	1009.8	2351.7	100
83.53	3465	2346	2351.7	67.3	83.89	3486	850	1087.8	4.8	84.25	1082.9	1009.8	2363.4	100
84.61	3549	2346	2351.7	68.5	84.97	3591	850	1078	4.8	85.33	1078	1009.8	2351.7	100
85.69	3654	2346	2351.7	68.1	86.05	3696	850	1073.1	4.8	86.41	1068.2	1009.8	2363.4	100
86.77	3759	2346	2375.1	70.1	87.13	3801	850	1058.4	4.8	87.49	1048.6	1009.8	2351.7	100
87.85	3864	2335.8	2340	70.5	88.17	3906	850	1038.8	4.8	88.49	1048.6	1009.8	2340	100
88.81	3948	2325.6	2328.3	70.1	89.15	3969	850	1038.8	4.8	89.5	1024.1	1009.8	2328.3	100

Audi Doodah · Jun 29, 2013

MAF is the minimum required air flow into the intake for a given acceleration. The actual will always be higher (unless there's a fault) because there's nothing to stop air going into the intake. MAF is basically Air, Yes or No...Yes, bang can happen...No, fault, no air, no bang.

Your MAP (boost) readings appear good but some repeated throttle cycles normally give more info. Have a look a this recent thread.

Results are easier to read in graph form so here's a how-to. Someone has posted a graphing tool on this forum that Swarcup used in the link above, but I can't find it. Maybe he can point you in the right direction if you don't have Excel.

SL11CKK · Jun 29, 2013

On this graph ready are all over as I was going through all the gears, but not maxing the throttle.

	Engine speed	Spec. intake press.	Actual intake press.	D.cycle MAP	Engine speed	MAF (specified)	MAF (actual)	EGR duty cycle	MAF	Atmos. pressure	Intake air press.	Throttle
TIME	2850-3150	2200-2400	2100-2600	35-80%	TIME	790-870	230-310	210-350	40-75%	TIME	900-1250	sensor -f96-	2100-2600	100%
STAMP	/min	mbar		%	STAMP	/min	mg/str	mg/str	%	STAMP	mg/str	mbar		%
0.01	882	1050.6	1076.4	19.9	0.36	1407	640	490	19.9	0.72	749.7	1009.8	1275.3	52.2
1.08	1575	1825.8	1579.5	33.1	1.44	1764	770	1014.3	4.8	1.81	1215.2	1009.8	2199.6	61.2
2.16	2940	2019.6	2480.4	76.5	2.52	2814	295	651.7	4.8	2.89	984.9	1009.8	1696.5	82
3.25	2310	2325.6	2176.2	53.4	3.6	2625	850	1249.5	4.8	3.96	1082.9	1009.8	2304.9	85.9
4.3	3192	2346	2304.9	68.1	4.66	3402	500	1102.5	4.8	5.02	661.5	1009.8	1778.4	2.7
5.38	2247	2315.4	1696.5	37.1	5.73	2352	850	1249.5	4.8	6.08	1195.6	1009.8	2597.4	68.6
6.44	2562	1968.6	2187.9	61	6.8	2667	770	935.9	28.3	7.16	1019.2	1009.8	2035.8	58
7.52	2835	1958.4	2106	68.1	7.88	2919	810	950.6	4.8	8.24	1058.4	1009.8	2117.7	63.5
8.6	3087	2101.2	2187.9	72.5	8.96	3192	820	960.4	4.8	9.32	989.8	1009.8	2024.1	80
9.68	3381	2346	2421.9	76.9	10.03	3486	850	994.7	4.8	10.38	1019.2	1009.8	2199.6	76.9
10.75	3675	2346	2223	67.7	11.1	3780	850	1033.9	4.8	11.46	1033.9	1009.8	2304.9	73.7
11.82	3507	1050.6	1895.4	51.8	12.16	2604	755	788.9	4.8	12.52	1038.8	1009.8	1907.1	43.9
12.88	2604	1315.8	1591.2	58.6	13.26	2646	790	891.8	4.8	13.62	1205.4	1009.8	2152.8	60.4
13.98	2730	2346	2269.8	61	14.34	2772	845	1200.5	4.8	14.7	847.7	1009.8	2106	59.6
15.06	2835	2040	2070.9	69.3	15.42	2877	755	749.7	26.3	15.78	842.8	1009.8	1778.4	51.8
16.14	2919	1856.4	1766.7	49.4	16.5	2961	760	911.4	47.4	16.85	833	1009.8	1836.9	52.5
17.19	3003	1672.8	1731.6	65.3	17.54	3024	700	720.3	60.2	17.9	715.4	1009.8	1556.1	43.9
18.26	3087	2346	1509.3	34.7	18.6	3129	850	1249.5	4.8	18.96	1043.7	1009.8	2585.7	75.7
19.32	3213	2131.8	2164.5	72.5	19.68	3255	715	730.1	4.8	20.02	720.3	1009.8	1579.5	46.7
20.38	3297	1458.6	1509.3	64.1	20.74	3297	655	705.6	4.8	21.1	671.3	1009.8	1474.2	27.1
21.46	3276	1040.4	1380.6	50.6	21.82	3297	390	543.9	4.8	22.18	656.6	1009.8	1310.4	35.7
22.54	3318	1509.6	1450.8	53.8	22.85	3339	710	842.8	4.8	23.17	769.3	1009.8	1708.2	51
23.51	3402	2029.8	1755	59.8	23.86	3444	835	1131.9	4.8	24.22	705.6	1009.8	2047.5	8.2
24.58	3402	1050.6	1532.7	50.6	24.94	3423	345	558.6	4.8	25.3	543.9	1009.8	1298.7	0
25.66	3360	1050.6	1263.6	50.6	26.02	3318	335	548.8	4.8	26.38	539	1009.8	1251.9	0
26.74	3234	1040.4	1251.9	50.2	27.1	3192	325	548.8	4.8	27.46	524.3	1009.8	1240.2	0
27.82	2961	1030.2	1228.5	49.4	28.18	2814	295	524.3	4.8	28.54	529.2	1009.8	1205.1	0
28.9	2520	1020	1193.4	44.2	29.26	2373	260	534.1	4.8	29.6	534.1	1009.8	1181.7	0
29.96	2142	999.6	1170	40.2	30.32	2058	230	524.3	4.8	30.68	514.5	1009.8	1158.3	0
31.04	2016	999.6	1146.6	38.6	31.4	2016	230	519.4	45.8	31.76	514.5	1009.8	1146.6	6.7

Audi Doodah · Jun 29, 2013

Are you trying to trace a fault because nothing looks out of the ordinary (even with too many plots on one graph!

)

SL11CKK · Jun 29, 2013

I feel that it doesn't have power as it used to before.

When shifting from 1st to 2nd from approx 2900rpm it used to even wheel spin, but now I can't for the life of me make it do that.

Baring in mind I still have the same tyres as I had then.

Intake manifold is spanking clean and have had the EGR bypass done. Its also running stock so don't have a clue what it may be.

Audi Doodah · Jul 3, 2013

Have you tried the Mr Muscle turbo clean?

SL11CKK · Jul 4, 2013

Yep tried that. Still the same

Audi Doodah · Jul 5, 2013

Do another log but block 11 only. Then plot Specified vs Actual pressure only so we can see the boost log clearly. Every time I look at the graph above, I doubt which colour legend is for what line :shrug:

SL11CKK · Jul 9, 2013

Done the log of 3rd gear - Group 11:

Audi Doodah · Jul 9, 2013

Looks like a text book boost plot so perhaps your issue is elsewhere. You say your not getting the power down like you used to so maybe your clutch is past it's best?

SL11CKK · Jul 9, 2013

Fresh clutch in there LUK one

Audi Doodah · Jul 11, 2013

Well in that case, I'm all out of ideas...sorry, pal!

pauldazzle · Jul 11, 2013

Certainly looks like a good boost plot. I'd like to see logs of group 013 & 023 to see what the injectors are up to.

SL11CKK · Jul 15, 2013

Ok. Ill wait until tonight and post it up. Just want to make sure everything is cool before I get it mapped too.

SL11CKK · Jul 16, 2013

OK im confused by this one so didn't post the pic of the actual graph.

	Group A:	013				Group B:	023
		Cyl 1	Cyl 2	Cyl 3	Cyl 4		(no units)	(no units)	(no units)	(no units)
	TIME	-2.8 to +2.8 mg/H	-2.8 to +2.8 mg/H	-2.8 to +2.8 mg/H	-2.8 to +2.8 mg/H	TIME
Marker	STAMP	mg/str	mg/str	mg/str	mg/str	STAMP
	0.31	-1.08	-0.33	0.94	0.42	0	-23	-10	-3	-2
	1.03	-1.08	-0.33	0.94	0.42	0.67	-20	-17	-9	-14
	1.75	-1.08	-0.33	0.94	0.42	1.39	-18	-17	-14	-18
	2.47	-1.08	-0.33	0.94	0.42	2.11	-17	-22	-8	-20
	3.19	-1.08	-0.33	0.94	0.42	2.83	-5	-7	-5	-6
	3.91	-1.08	-0.33	0.94	0.42	3.55	7	-13	-7	-9
	4.62	-1.08	-0.33	0.94	0.42	4.27	-5	-25	-15	-1
	8.21	-1.08	-0.33	0.94	0.42	8.57	-6	-23	-24	-26
	8.93	-1.08	-0.33	0.94	0.42	9.29	-6	-23	-24	-26
	9.64	-1.08	-0.33	0.94	0.42	9.98	-6	-23	-24	-26
	10.35	-1.08	-0.33	0.94	0.42	10.7	-6	-23	-24	-26
	11.06	-1.08	-0.33	0.94	0.42	11.42	-6	-23	-24	-26
	11.78	-1.08	-0.33	0.94	0.42	12.14	-18	-21	-6	-20
	12.5	-1.08	-0.33	0.94	0.42	12.86	-33	-24	-6	-26
	13.22	-1.08	-0.33	0.94	0.42	13.58	-25	-23	3	-15
	13.94	-1.08	-0.33	0.94	0.42	14.29	-23	-26	-4	-21
	14.64	-1.08	-0.33	0.94	0.42	15.01	-21	-27	-8	-22
	15.37	-1.08	-0.33	0.94	0.42	15.73	-20	-17	-4	-21
	16.09	-1.08	-0.33	0.94	0.42	16.45	-23	-21	-1	-25
	16.79	-1.08	-0.33	0.94	0.42	17.16	-17	-19	-1	-15
	17.52	-1.08	-0.33	0.94	0.42	17.86	-17	-19	-1	-15
	18.22	-1.08	-0.33	0.94	0.42	18.58	-17	-19	-1	-15
	18.94	-1.08	-0.33	0.94	0.42	19.3	-17	-19	-1	-15
	19.66	-1.08	-0.33	0.94	0.42	20.02	-17	-19	-1	-15
	20.36	-1.08	-0.33	0.94	0.42	20.72	-17	-19	-1	-15
	21.08	-1.08	-0.33	0.94	0.42	21.44	-17	-19	-1	-15
	21.79	-1.08	-0.33	0.94	0.42	22.14	-17	-19	-1	-15
	22.5	-1.08	-0.33	0.94	0.42	22.86	-17	-19	-1	-15
	23.22	-1.08	-0.33	0.94	0.42	23.59	-17	-19	-1	-15
	23.94	-1.08	-0.33	0.94	0.42	24.3	-17	-19	-1	-15
	24.66	-1.08	-0.33	0.94	0.42	25.02	-17	-19	-1	-15
	25.38	-1.08	-0.33	0.94	0.42	25.72	-17	-19	-1	-15
	26.08	-1.08	-0.33	0.94	0.42	26.44	-17	-19	-1	-15
	26.8	-1.08	-0.33	0.94	0.42	27.16	-17	-19	-1	-15
	27.52	-1.08	-0.33	0.94	0.42	27.88	-17	-19	-1	-15
	28.24	-1.08	-0.33	0.94	0.42	28.58	-17	-19	-1	-15
	28.94	-1.08	-0.33	0.94	0.42	29.3	-17	-19	-1	-15
	29.66	-1.08	-0.33	0.94	0.42	30.02	-17	-19	-1	-15
	30.38	-1.08	-0.33	0.94	0.42	30.74	-17	-19	-1	-15
	31.1	-1.08	-0.33	0.94	0.42	31.46	-11	-13	9	-3
	31.82	-1.06	-0.33	0.96	0.4	32.18	-2	-9	9	1
	32.54	-1.06	-0.35	0.96	0.42	32.9	-2	-13	10	1
	33.26	-1.06	-0.38	0.96	0.49	33.62	-1	-11	13	2
	33.98	-1.08	-0.38	0.92	0.49	34.34	0	-13	12	6
	34.7	-1.01	-0.35	0.85	0.49	35.06	-7	-16	6	1
	35.42	-0.87	-0.33	0.75	0.4	35.78	-4	-16	8	-1
	36.14	-0.85	-0.38	0.8	0.38	36.5	-7	-16	8	2
	36.86	-0.85	-0.38	0.78	0.4	37.22	-5	-11	13	-2
	37.58	-0.87	-0.4	0.8	0.42	37.94	0	-12	11	0
	38.3	-0.89	-0.38	0.8	0.47	38.66	-3	-9	13	4
	39.02	-0.92	-0.4	0.78	0.49	39.38	-2	-10	14	4
	39.74	-0.94	-0.42	0.8	0.54	40.1	-1	-13	18	3
	40.46	-0.94	-0.49	0.82	0.61	40.8	4	-11	18	7
	41.16	-0.99	-0.52	0.8	0.68	41.52	-3	-12	13	0
	41.88	-1.01	-0.59	0.85	0.71	42.24	-5	-14	9	0
	42.6	-0.99	-0.64	0.89	0.68	42.96	-8	-17	8	3
	43.3	-0.94	-0.71	0.99	0.64	43.66	-11	-16	8	2
	44.02	-0.85	-0.75	1.04	0.54	44.38	-3	-11	8	4
	44.74	-0.85	-0.75	1.04	0.54	45.1	-9	-15	11	1
	45.46	-0.85	-0.75	1.04	0.54	45.82	-8	-19	12	1
	46.18	-0.85	-0.75	1.04	0.54	46.54	-7	-16	12	1
	46.9	-0.85	-0.75	1.04	0.54	47.26	-6	-13	14	1
	47.62	-0.85	-0.75	1.04	0.54	47.98	-9	-14	17	2
	48.34	-0.85	-0.75	1.04	0.54	48.7	-4	-9	13	-4
	49.06	-0.85	-0.75	1.04	0.54	49.42	-3	-9	14	-4
	49.78	-0.85	-0.75	1.04	0.54	50.14	-3	-9	14	-4
	50.5	-0.85	-0.75	1.04	0.54	50.86	-3	-9	14	-4
	51.22	-0.85	-0.75	1.04	0.54	51.58	-3	-9	14	-4
	51.94	-0.85	-0.75	1.04	0.54	52.3	-3	-9	14	-4
	52.66	-0.85	-0.75	1.04	0.54	53.02	-3	-9	14	-4
	53.38	-0.85	-0.75	1.04	0.54	53.74	-3	-9	14	-4
	54.1	-0.85	-0.75	1.04	0.54	54.46	-3	-9	14	-4
	390.83	-0.94	-0.99	1.18	0.75	391.19	-13	-21	5	-8
	391.55	-0.94	-0.99	1.18	0.75	391.91	-16	-28	-5	-20
	392.27	-0.94	-0.99	1.18	0.75	392.63	-7	-15	0	-15
	392.99	-0.94	-0.99	1.18	0.75	393.35	-11	-19	-14	-24
	393.71	-0.94	-0.99	1.18	0.75	394.07	-3	-18	-3	-21
	394.43	-0.94	-0.99	1.18	0.75	394.79	5	-6	-5	-6
	395.15	-0.94	-0.99	1.18	0.75	395.51	5	-13	-1	-9
	501.34	-0.09	-0.82	0.61	0.21	500.98	5	-9	21	8
	502.06	-0.09	-0.82	0.61	0.21	501.7	-6	-24	5	-5
	502.78	-0.09	-0.82	0.61	0.21	502.42	-5	-25	0	-15
	503.5	-0.09	-0.82	0.61	0.21	503.14	-7	-22	6	-9
	504.22	-0.09	-0.82	0.61	0.21	503.86	-7	-24	-13	-17
	504.94	-0.09	-0.82	0.61	0.21	504.58	-5	-25	3	-22
	505.66	-0.09	-0.82	0.61	0.21	505.3	-6	-22	-6	-8
	506.38	-0.09	-0.82	0.61	0.21	506.02	12	-15	0	-3
	507.1	-0.09	-0.82	0.61	0.21	506.74	4	-14	-1	-5
	507.82	-0.09	-0.82	0.61	0.21	507.46	-10	-13	-5	-15
	508.54	-0.09	-0.82	0.61	0.21	508.18	-28	-32	-20	-28
	509.26	-0.09	-0.82	0.61	0.21	508.9	-36	-15	-19	-13
	578.17	-0.68	-0.38	0.85	0.16	577.81	11	-8	26	5
	578.89	-0.68	-0.35	0.89	0.14	578.53	10	-10	22	5
	579.61	-0.75	-0.35	0.94	0.16	579.25	3	-7	22	5
	580.33	-0.82	-0.35	1.01	0.19	579.97	9	-8	22	7
	581.05	-0.89	-0.35	1.04	0.21	580.69	12	-10	24	1

Audi Doodah · Jul 16, 2013

Injectors logs are "status checks" rather than graph logs.

Seems you could have one or two problem injectors. A value of around 1 mg/str in block 13 usually indicates a problem. Lots of negative values in block 23 doesn't look good either. Have a look at block 18 and see if there's any figures logging there, ideally they should be all zeros.

Here's a link to Paul's thread where he had a problem injector

Your problems could be cured with some injector cleaner (I've used Liqui Moly Diesel Purge). Failing that, you need to check the injector lash, as described in Paul's thread. Then it's swapping out injectors to trace which one/ones are at fault. It could also be worn camshaft lobes, particularly if you car has been on the long life service plan.

I'm sure Paul will be along soon to share his hands-on knowledge.

SL11CKK · Jul 16, 2013

I think ive just got a heart attack!

Audi Doodah · Jul 16, 2013

Sorry, mate!

Finger's crossed they're just dirty. Google the Liqui Moly Diesel Purge. You pump the stuff through the engine instead of fuel (direct through the fuel lines and not the tank). It left a big patch of soot at my exhaust when I did mine and it brought my figures down in block 18.

SL11CKK · Jul 16, 2013

I've just ordered a 500ml can now. So hopefully its just clogged and nothing major.

Also how do I check for cam wear without opening my rocker. I know I look through the oil cap, but what am I looking for to be precise.

Audi Doodah · Jul 16, 2013

Very limited view through the oil filler cap so ideally rocker cover off. Plenty of images if you google but a good lobe will have a smooth, even surface with no scores, grooves, ridges, etc. From what I've read, it seems to be more common on the 2.5 Tdi rather than the 1.9 Tdi though

pauldazzle · Jul 17, 2013

Yes, you need to get the rocker cover off & check the cam lobes. PD engine has known wear issues with worn cam lobes.
Cover is easy to remove but i would advise that you get a new rocker gasket, £18ish from TPS IIRC. If the cam looks ok it would point to injectors failing, again not uncommon.

SL11CKK · Jul 22, 2013

Ok, finally the can is here, but do you guys know what size is the pipe I need to get.

Im thinking of nipping over to machinemart or eurocarparts to get the hoses and joints

Audi Doodah · Jul 23, 2013

I think i used 8mm tubing that I got from ebay along with some metal pipe connectors. Be aware that normal silicon tubing goes very soft with the hot fuel so I recommend getting high temp tubing. Also, because you're potentially dislodging crap in the engine, I'd recommend doing an oil, oil filter and fuel filter change after doing a purge.

Logging Results: PD130

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Registered User

Similar threads