Very sick ibiza cupra tdi

[Scaniav8143]

Hi, I have seat Ibiza cupra tdi 2005 which has been experiencing acceleration problems no power till after 3000 rpm from time to time. Really bad turbo lag intermittently. Vacuum actuator on turbo is moving & holding. No boost leaks either. When first started in the morning it has absolutely no power till the engine has warmed up a little & if booted at all before engine has warmed will go into limp mode. Once engine is at 90C power returns no limp mode but intermittent acceleration problem as stated above.
VAG COM Fault is:
17964 - Charge Pressure Control: Negative Deviation

P1556 - 35-10 - - - Intermittent
I have had this car at two different mechanics & they have failed to fix anything
Anyone any ideas before I get tired off it & trade it in?

Thanks John

 

[towcester vag]

requires turbo clean as fault code refers to sticky variable veins

 

[Nath.]

I fixed my mates VW Sharan with the exact fault that you have. The vacuum actuator on the turbo was moving & holding but it wasn't moving enough. After a good spray of wd40 it moved twice as far.

 

[Scaniav8143]

boost log

Boost Log with Vag com, thinking of ordering a new turbo,



Wednesday 28 December 2011 00:51:59
038 906 019 MS 1.9l R4 EDC 0000SG 7000

Group A: '011 Group B: Not Running
Engine speed Spec. intake press. Actual intake press. D.cycle MAP
TIME 2850-3150 2300-2600 2200-2800 35-80% TIME
Marker STAMP /min % STAMP
0 987 1344 1140 19.9
0.4 1239 1368 1128 19.9
0.8 1449 1452 1164 22.7
1.2 1680 1536 1248 24.7
1.6 1932 1584 1368 37.9
2 2163 1608 1524 45.4
2.4 2436 1800 1668 49.8
2.8 2709 1788 1896 61
3.2 2730 1032 1848 43.4
3.6 2394 1044 1524 41
4 1869 1956 1452 24.7
4.4 2037 1836 1560 41
4.8 2205 2088 1704 24.7
5.2 2415 2508 1908 33.1
5.6 2688 2508 2256 55
6 2961 2544 2652 67.7
6.4 3297 2544 2988 79.3
6.8 3633 2520 2988 82.1
7.2 3591 1080 2736 47.4
7.6 3045 1044 1908 45.4
8 2352 1236 1500 41.4
8.4 1911 1512 1404 38.3
8.8 1953 1644 1512 43.4
9.2 1974 1584 1596 42.6
9.6 2016 1596 1632 43
10 2037 1596 1644 43.8
10.4 2079 1728 1644 43
10.8 2121 2460 1740 29.1
11.2 2184 2472 1908 32.7
11.6 2226 2484 2088 40.2
12 2310 2508 2304 50.2
12.4 2394 2520 2532 54.6
12.8 2478 2532 2712 59.4
13.2 2583 2544 2844 63.8
13.6 2688 2544 2964 68.9
13.98 2772 2544 2988 70.9
14.38 2856 2544 2988 73.3
14.78 2940 2544 2988 74.9
15.18 3024 2544 2988 76.9
15.58 3087 2544 2988 77.7
15.98 3171 2544 2988 78.5
16.38 3213 2544 2928 77.3
16.77 3276 2544 2856 76.5
17.17 3339 2544 2796 74.9
17.57 3402 2544 2772 74.5
17.97 3465 2544 2772 76.5
18.37 3528 2544 2772 77.3
18.77 3591 2532 2784 78.9
19.16 3633 2520 2784 80.5
19.56 3717 2508 2784 82.1
19.96 3780 2496 2784 83.7
20.36 3843 2472 2784 86.1
20.76 3885 2448 2772 84.1
21.16 3948 2424 2772 86.9
21.56 3822 1092 2616 48.6
21.96 3087 1044 1824 45.4
22.36 2499 1008 1500 42.6
22.76 1995 996 1320 38.3
23.16 1533 996 1188 31.5
23.56 1113 996 1104 30.7
23.96 945 1044 1068 24.7
24.36 903 1056 1044 24.7

 

[Seatmann]

New turbo? Seriously? Why not just clean it? You could also have a boost leak, dodgey N75 valve, bad maf, bad map sensor etc. I wouldn't think of puting on a new turbo unless the bearings were shot and it was about to explode

http://www.myturbodiesel.com/1000q/multi/limp-mode-TDI-fix.htm

 

[darkhorse]

Spray the actuator with WD40 and leave for 1/2 hour to soak

With the engine running use vagcom, 01 - engine, basic settings, group 11 (I think) and leave the VNT actuator cycling for 1/2 an hour

You can do the output tests and when the car stalls, click on next (to cycle the actuator) and listen for vac leaks.
Cheaper than buying a new turbo if it works. If it doesn't you've lost an hour of your time

 

[Bondiblu]

Boost Log with Vag com, thinking of ordering a new turbo,



Wednesday 28 December 2011 00:51:59
038 906 019 MS 1.9l R4 EDC 0000SG 7000

Group A: '011 Group B: Not Running
Engine speed Spec. intake press. Actual intake press. D.cycle MAP
TIME 2850-3150 2300-2600 2200-2800 35-80% TIME
Marker STAMP /min % STAMP
0 987 1344 1140 19.9
0.4 1239 1368 1128 19.9
0.8 1449 1452 1164 22.7
1.2 1680 1536 1248 24.7
1.6 1932 1584 1368 37.9
2 2163 1608 1524 45.4
2.4 2436 1800 1668 49.8
2.8 2709 1788 1896 61
3.2 2730 1032 1848 43.4
3.6 2394 1044 1524 41
4 1869 1956 1452 24.7
4.4 2037 1836 1560 41
4.8 2205 2088 1704 24.7
5.2 2415 2508 1908 33.1
5.6 2688 2508 2256 55
6 2961 2544 2652 67.7
6.4 3297 2544 2988 79.3
6.8 3633 2520 2988 82.1
7.2 3591 1080 2736 47.4
7.6 3045 1044 1908 45.4
8 2352 1236 1500 41.4
8.4 1911 1512 1404 38.3
8.8 1953 1644 1512 43.4
9.2 1974 1584 1596 42.6
9.6 2016 1596 1632 43
10 2037 1596 1644 43.8
10.4 2079 1728 1644 43
10.8 2121 2460 1740 29.1
11.2 2184 2472 1908 32.7
11.6 2226 2484 2088 40.2
12 2310 2508 2304 50.2
12.4 2394 2520 2532 54.6
12.8 2478 2532 2712 59.4
13.2 2583 2544 2844 63.8
13.6 2688 2544 2964 68.9
13.98 2772 2544 2988 70.9
14.38 2856 2544 2988 73.3
14.78 2940 2544 2988 74.9
15.18 3024 2544 2988 76.9
15.58 3087 2544 2988 77.7
15.98 3171 2544 2988 78.5
16.38 3213 2544 2928 77.3
16.77 3276 2544 2856 76.5
17.17 3339 2544 2796 74.9
17.57 3402 2544 2772 74.5
17.97 3465 2544 2772 76.5
18.37 3528 2544 2772 77.3
18.77 3591 2532 2784 78.9
19.16 3633 2520 2784 80.5
19.56 3717 2508 2784 82.1
19.96 3780 2496 2784 83.7
20.36 3843 2472 2784 86.1
20.76 3885 2448 2772 84.1
21.16 3948 2424 2772 86.9
21.56 3822 1092 2616 48.6
21.96 3087 1044 1824 45.4
22.36 2499 1008 1500 42.6
22.76 1995 996 1320 38.3
23.16 1533 996 1188 31.5
23.56 1113 996 1104 30.7
23.96 945 1044 1068 24.7
24.36 903 1056 1044 24.7

This is deffo a problem with VNT control, and I would get it sorted ASAP. Your logs appear to be requesting stock boost but actual is going past the MAP sensors limit of 3 Bar and holding. Your turbo won't last at this rate. As already stated, check the Vac pipe going to the actuator for splits.