fault code 17705 help please.

[leoncupra180]

Hi guys been having problems for few weeks now, Hesistation on low throttle and then pulls trough somtimes ok but sometims feels like its holding back a little. It feels and sounds as if its dumping to early or when it feels like it, if that make sence. The fault code is (1 Fault Found:17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!) P1297 - 35-00 - -) every time i clear it it comes straight back even on idle.

So before i start throwing more cash at my car on garge prices and parts as iv spent a fare bit on upgrades (forge tip, forge 007, dynotwist intake miltek cat back exhaust and p-torque stage 1 remap) and get the free version of vag com and check to see what codes if any it would give iv done a search on here a there mixed feedback on what to replace, as all the pipe work seems fine no splits i think.

So im thinking maf or n75 but iv put on n75j as i though that might of sorted the problems out but no change i shall try a leak test on the weekend to rule that out. Also i cleaned TB without unpluging it as i cant reset it should do TB reset.

I have done some logs with vag com hope iv posted them right. as its the free version not sure what to log for the best plus this is new to me and dont know what to look for so any help would be great.

	Group A:	'005			
		Engine Speed	Engine Load	Speed	Load Status
	TIME				
Marker	STAMP	 /min	%	 km/h	
	20.12	1080	33.1	0	Part Throttle
	21.44	1160	25.6	0	Part Throttle
	22.75	920	40.6	1	Part Throttle
	24.06	960	43.6	7	Part Throttle
	25.35	1200	30.8	10	Part Throttle
	26.57	1560	39.1	13	Part Throttle
	27.88	1720	17.3	16	Idle
	29.18	1040	17.3	14	Idle
	30.47	760	21.1	13	Idle
	31.71	720	24.1	11	Idle
	33	400	27.8	9	Idle
	45.06	760	19.5	6	Idle
	46.37	760	23.3	3	Idle
	47.66	960	18.8	0	Part Throttle
	48.89	1560	27.8	0	Part Throttle
	50.19	1480	31.6	0	Part Throttle
	51.5	1360	42.1	3	Enrich.
	52.81	1960	60.9	14	Part Throttle
	54.01	2240	56.4	18	Part Throttle
	55.23	2240	18	22	Part Throttle
	56.64	2120	86.5	29	Enrich.
	58.04	2880	98.5	40	Part Throttle
	59.34	3680	111.3	50	Part Throttle
	60.65	4400	89.5	62	Part Throttle
	61.87	3080	43.6	65	Part Throttle
	63.16	3200	48.1	66	Part Throttle
	64.38	3240	18.8	68	Part Throttle
	65.58	3200	17.3	67	Part Throttle
	66.89	3160	20.3	66	Part Throttle
	68.2	3200	44.4	66	Part Throttle
	69.5	3400	74.4	69	Part Throttle
	70.81	3720	90.2	75	Part Throttle
	72.03	4080	98.5	83	Part Throttle
	73.32	4000	10.5	91	Part Throttle
	74.54	3440	21.1	92	Part Throttle
	75.74	3400	11.3	91	Part Throttle
	77.05	3320	11.3	90	Part Throttle
	78.36	3280	11.3	88	Part Throttle
	79.66	3200	12	86	Part Throttle
	80.87	3080	12	84	Part Throttle
	82.07	3000	12	81	Part Throttle
	83.38	2920	12.8	79	Part Throttle
	84.7	2800	16.5	76	Part Throttle
	86.2	2760	28.6	75	Part Throttle
	87.51	2760	50.4	74	Enrich.
	88.81	2840	56.4	75	Part Throttle
	90.12	2880	43.6	77	Part Throttle
	91.53	2920	30.1	78	Part Throttle
	92.84	2920	41.4	78	Part Throttle
	94.15	3000	54.1	80	Part Throttle
	95.45	3200	80.5	85	Part Throttle
	96.76	3320	46.6	89	Part Throttle
	98.07	3360	36.1	90	Part Throttle
	99.27	3400	48.9	91	Part Throttle
	100.49	3480	74.4	92	Part Throttle
	101.69	3640	121.8	96	Part Throttle
	103	3880	166.2	103	Part Throttle
	104.2	4200	165.4	110	Part Throttle
	105.51	4160	11.3	115	Part Throttle
	106.72	3280	12	111	Overrun
	108.13	2920	12.8	100	Overrun
	109.54	2200	13.5	88	Overrun
	110.74	1200	15	81	Idle
	112.05	1360	19.5	75	Part Throttle
	113.35	2640	15	71	Part Throttle
	114.66	2600	36.8	70	Enrich.
	115.97	2600	48.1	70	Part Throttle
	117.17	2600	38.3	70	Part Throttle
	118.48	2560	36.1	69	Part Throttle
	119.79	2560	41.4	68	Part Throttle
	121.1	2560	46.6	68	Part Throttle
	122.4	2520	30.8	68	Part Throttle
	123.71	2400	27.1	65	Part Throttle
	124.93	2360	23.3	64	Part Throttle
	126.22	2200	12.8	61	Idle
	127.54	2040	13.5	56	Overrun
	128.74	1920	13.5	53	Overrun
	130.05	1760	13.5	49	Overrun
	131.45	1000	18	45	Idle
	132.77	760	21.1	40	Idle
	133.97	760	21.1	36	Idle
	135.49	720	24.1	29	Idle
	136.78	720	22.6	18	Idle
	138	760	22.6	6	Idle
	139.2	1520	42.1	4	Part Throttle
	140.51	1480	52.6	11	Part Throttle
	141.92	2560	57.9	21	Part Throttle
	143.12	1880	33.1	24	Enrich.
	144.33	1880	49.6	27	Part Throttle
	145.64	2280	67.7	32	Enrich.
	147.05	2280	30.8	38	Enrich.
	148.35	2280	103	44	Enrich.
	149.66	2880	151.9	56	Part Throttle
	150.88	3640	172.9	71	Part Throttle
	152.28	4400	165.4	88	Part Throttle
	153.58	4440	10.5	101	Part Throttle
	154.8	3760	18	101	Part Throttle
	156.09	3680	12	99	Overrun
	157.4	3360	12.8	93	Overrun
	158.71	3080	12	84	Overrun
	159.91	3000	14.3	81	Part Throttle
	161.23	2960	19.5	80	Part Throttle
	162.44	2960	21.1	79	Part Throttle
	163.85	2960	21.8	79	Part Throttle
	165.15	2960	31.6	79	Part Throttle
	166.36	3000	31.6	80	Part Throttle
	167.66	3040	30.1	82	Part Throttle
	168.87	3080	30.1	82	Part Throttle
	170.28	3120	30.1	84	Part Throttle
	171.48	3160	30.8	85	Part Throttle
	172.79	3200	30.8	85	Part Throttle
	174.01	3200	30.8	86	Part Throttle
	175.3	3200	27.8	86	Part Throttle
	176.52	3200	27.1	86	Part Throttle
	177.72	3160	27.1	85	Part Throttle
	178.94	3160	45.9	85	Part Throttle
	180.34	3240	58.6	87	Part Throttle
	181.75	3440	76.7	91	Part Throttle
	183.05	3480	31.6	93	Part Throttle
	184.36	3440	24.8	93	Part Throttle
	185.77	3400	47.4	92	Enrich.
	186.98	3560	99.2	94	Enrich.
	188.28	3800	163.9	100	Part Throttle
	189.59	4200	165.4	110	Part Throttle

 

[leoncupra180]

Group C:	'003			
	Engine Speed	Intake Air Mass	Throttle Drive	Ignition
TIME			Angle Sensor 1	Timing Angle
STAMP	 /min	 g/s	%	 °BTDC
0.42	720	2.86	1.6	3
1.62	760	2.94	1.2	2.3
2.83	720	2.83	1.6	3.8
4.14	760	2.92	1.6	3
5.34	720	2.83	1.6	3.8
6.56	720	2.86	1.6	3.8
7.97	720	2.86	1.6	3.8
9.28	760	3.14	1.6	2.3
10.57	720	3.17	1.6	0
11.98	760	3.14	1.6	1.5
13.28	760	3.17	1.6	1.5
14.49	720	3	1.6	0.8
15.8	720	3.08	1.6	1.5
17.1	720	3.17	1.6	0.8
18.43	720	3.08	1.6	1.5
19.72	1040	6.22	4.3	1.5
20.94	1160	5.81	3.9	11.3
22.25	1000	7.14	4.7	13.5
23.64	880	7.58	5.5	1.5
24.95	1160	7.08	4.7	6.8
26.17	1440	11.08	7.1	10.5
27.47	1800	10.97	7.1	4.5
28.78	1200	3.56	2	12.8
29.99	840	3.08	1.6	3
31.29	720	3.53	2	3.8
32.59	760	0	0.8	3.8
44.66	760	2.61	1.2	9
45.97	720	3.19	1.6	0.8
47.18	1120	2.78	1.6	7.5
48.48	1440	6.94	5.1	18
49.79	1520	9.53	6.3	14.3
51.01	1440	8.25	5.5	18
52.3	1680	20.39	15.7	17.3
53.6	1920	21.81	14.1	7.5
54.81	2400	3.28	3.1	3
56.12	1880	27.86	20.8	18
57.53	2600	48.17	31.8	6
58.94	3440	75.42	83.5	6.8
60.16	4160	91.56	100	8.3
61.45	3640	30.08	16.1	27
62.76	3200	30.03	15.7	21.8
63.98	3240	21.89	11	9.8
65.18	3200	11	7.1	22.5
66.49	3160	11.03	7.1	33.8
67.69	3160	21.69	12.9	31.5
69	3280	40.17	20.4	22.5
70.41	3600	59.06	26.7	28.5
71.61	3960	73.08	36.5	16.5
72.92	4360	51.64	18	6.8
74.14	3400	14.42	8.6	33.8
75.34	3400	7.22	4.7	32.3
76.65	3360	7.36	4.7	8.3
77.85	3280	7.25	4.7	20.3
79.26	3200	6.89	4.7	21
80.47	3120	6.72	4.7	18
81.67	3040	6.5	4.3	19.5
82.89	2920	6.92	4.7	18
84.18	2840	6.86	4.7	34.5
85.7	2760	13.89	8.6	29.3
87.11	2760	21.94	13.3	28.5
88.41	2800	30.44	16.9	16.5
89.72	2840	24.5	12.9	12
91.13	2920	16.86	10.2	18.8
92.34	2920	14.25	8.6	30.8
93.75	3000	28.67	16.9	30.8
95.05	3120	47.25	22.7	19.5
96.36	3320	34.94	18.8	8.3
97.67	3360	21.94	12.5	20.3
98.87	3400	31.44	16.5	22.5
100.09	3440	44.19	21.2	21.8
101.28	3560	71.61	31	13.5
102.6	3800	126.83	100	3.8
103.8	4080	137.06	100	1.5
105.11	4760	0	3.5	6.8
106.31	3360	7.69	5.1	1.5
107.62	3040	7.14	4.7	1.5
109.03	2680	6.94	4.3	0
110.34	1320	4.47	2.7	9.8
111.65	1040	2.72	1.2	5.3
112.95	2680	6.64	4.3	24
114.26	2600	17.78	11	27
115.47	2600	24.64	14.1	16.5
116.77	2600	20.33	11.4	8.3
117.99	2600	17.81	10.6	20.3
119.39	2560	19.61	11.8	18
120.59	2560	21.44	12.5	18.8
121.91	2520	16.33	9.8	15.8
123.22	2440	12.31	7.8	21
124.51	2360	11.94	7.8	18.8
125.82	2280	5.31	3.1	28.5
127.04	2120	5.47	3.5	2.3
128.34	1960	4.72	2.7	3
129.65	1800	4.81	2.7	3.8
131.04	1080	3.5	2	7.5
132.37	800	3.06	1.6	3
133.57	760	2.83	1.2	5.3
134.97	720	3	1.6	3.8
136.38	760	2.97	1.6	3.8
137.58	760	3.03	1.6	2.3
138.78	1240	9.44	6.7	15.8
140.01	1320	14.83	10.2	12.8
141.42	2200	26.08	16.5	11.3
142.72	2320	5.22	3.9	30.8
143.93	1840	16.25	10.6	20.3
145.13	2080	25.08	16.1	20.3
146.54	2520	4.86	2.7	2.3
147.95	2120	42.31	96.1	19.5
149.26	2680	72.56	100	10.5
150.46	3400	129.11	100	3.8
151.77	4160	127.28	100	3
153.18	4840	149.89	98.8	6.8
154.39	3760	11.97	7.8	39
155.69	3680	8.11	5.1	2.3
157	3480	8.03	5.1	1.5
158.22	3160	7.39	4.7	1.5
159.51	3040	7.89	5.1	24.8
160.83	3000	10.92	7.1	29.3
162.03	2960	12.22	7.8	26.3

 

[8bit]

See this page for more details.

I'd be checking all your hoses, there's ones under the intake manifold too. Leak test may show something. If you haven't got the full VAGCOM then try posting in the VAGCOM help section, maybe someone near you can do the throttle body reset for you.

EDIT - worth checking your 007 isn't sticking too, take it off all the hoses, push the piston in the bottom up then while holding that there cover the end of the small top pipe with your finger and let the piston go. It should drop a few mm but no more than that until you remove your finger from the top pipe.

 

[G1NG3R]

i had this fault too.??

 

[oldskool]

vac pipe under inlet manifold. Its exactly what mine was like before i changed mine.

 

[Mo Arif]

i don't think you can buy a mk1 seat leon turbo without this fault code!!!!!!!!! it comes standard with the 1.8T engines.

 

[armo]

i don't think you can buy a mk1 seat leon turbo without this fault code!!!!!!!!! it comes standard with the 1.8T engines.

couldnt be more correct! iv had it for months and still cant get rid, changed vacs, n75, checked all other pipes, checked DV and nothing, limp mode baby! get used to seeing this code your gonna become very friendly with it

 

[leoncupra180]

Thank you guys for your reply's.

Sometimes i have boost issues not pulling through the gears smoothly... sometimes not very strange, but just latelly its getting worse. Also starting to notice a real air sucking nosie but it holds back at that point cant remember air intake been as load as it is before, I will get it over the pit in work on the weekend and give it a good check over with home made leak tester and check under intake manifold pipe work. I must check the SAI pump over to as its load on startup and do the mod.

Love this site the tips and guides saved me loads time and headaches understanding how it all works .

Forgot i have done the n249 bypass to so i might change that back in work tomorrow when checking the 007 over thanks for the info on that mate .
Just got to say its the best car iv had in the snow better than the astra gsi turbo last year that was real bad.

 

[8bit]

Loud air noises usually mean a leak somewhere. As oldskool says check the pipes under the intake manifold very carefully, check *all* boost hoses (even behind the bumper and under the TIP.