Overboosting actuator adjustment

[mrapoc]

I know...I know you shouldnt touch it but somebody beat me to it (psi tuning in stoke )

Its constantly overboosting by like 400 - so. I was gonna check that they actually adjusting it the right direction - in terms of screwing it down towards the floor, this allows less movement on the arm (yes?) so should limit the amount of boost - whereas screwing back towards the turbo will allow more movement and more boost?

Cheers!

[scarr89]

Why did they adjust it? You got logs to show that it is over boosting? Is it overboosting by 400psi through out the range? Hit limp mode yet?

[Steve_PD]

Christ to it was over boosting by 400 psi there won't be much of the car left

1000 Millibar = 14.5psi

400 millibar = 5.8psi

[old_n07]

Have a read through this thread http://uk-mkivs.net/forums/t/394072.aspx

[mrapoc]

on 400millbar lol

tested actuator today and it does move although i think its been adjusted towards the turbo meaning it can move more = more boost  ?

[RTechUK]

The actuator should not need to be adjusted from its stock factory position.

400mb over boost for a split second is fine and I would say 99% of 1.9TDi engines see this overshoot, buts its an issue when the N75 duty is at 94+% trying to bring the boost down across most of the rpm range.

If the over shoot is constant then I would say you have one of the following.

Sticky VNT
Faulty boost control valve
Issues with the VAC system
Blocked cat
Actuator diaphragm got a whole

Nick

[mrapoc]

Hi Nick, I spoke to you a week or so ago. Been meaning to come see you but just starting work full time 

Getting the cat cut out next week 
You guys fitted a new actuator when I had my VNT clean at end of last year and I've driven it hard since

The arm seems to move when I tested it using the EGR solenoid by about 1cm (at a guess) and I've been through 2 N75 valves.

So i'm hoping the cat will sort it, if not I may need to look at the actuator arm - all thanks to PSI tuning (how can they be in business never mind sponsor a forum)


edit: I purposely created a boost leak earlier and gave it a rev, and i still got no black smoke - other than this is there anything else to point to the cat?

[topher]

if i remember right it was requesting (abs) 2000mb across the whole band with 400mb overshoot the whole way, n75 maxed out. i only got chance to give the car a quick spin around the block.

remapped by ebay

[mrapoc]

Can remaps do that? I'd have thought that the map would be requesting X and getting specified as X+400 then something mechanically isn't right?

Plenty of people seem to be having a great time with blacksmoke remaps

Plus theres the issue that PSI found it overboosing and into limp mode prior to the remap, but i suppose for diagnosing sake it would be best to revert to stock

[mrapoc]

Log topher was referring to 

Code: [Select]

Tuesday 15 May 2012 10:41:13:28029 VCDS Version: Release 11.11.3 Data version: 20120401
038 906 019 CJ 1.9l R4 EDC 0000SG  1086

Group A: '011 Group B: '003 Group C: Not Running
Engine speed Spec. intake press. Actual intake press. D.cycle MAP Engine speed MAF (specified) MAF (actual) EGR duty cycle
TIME 2850-3150 2000-2150 2000-2200 40-95% TIME 820-900 230-420 230-420 10-95% TIME
Marker STAMP /min mbar mbar % STAMP /min mg/str mg/str % STAMP
0.36 1386 1356.6 1122 21.9 0 1302 475 485.1 30.3
1.08 1491 1417.8 1264.8 26.3 0.72 1491 575 539 19.9
1.8 1491 1560.6 1336.2 21.9 1.44 1365 585 592.9 22.7
2.52 1953 1387.2 1581 62.6 2.16 1785 690 637 4.8
3.24 1176 1397.4 1326 20.7 2.88 1659 250 592.9 4.8
3.96 1407 1815.6 1346.4 22.3 3.6 1260 850 602.7 4.8
4.68 1785 2091 1632 39.4 4.32 1575 850 695.8 4.8
5.4 2247 2091 2346 75.7 5.04 2016 850 1058.4 4.8
6.12 2751 2091 2223.6 74.5 5.76 2520 850 1122.1 4.8
6.84 3255 2091 2264.4 81.7 6.48 3024 850 1009.4 4.8
7.56 3696 2091 2315.4 89.3 7.2 3486 850 1004.5 4.8
8.28 4095 2091 2284.8 93.6 7.92 3885 850 965.3 4.8
9 4410 2029.8 2254.2 94.4 8.64 4263 850 935.9 4.8
9.72 4473 1224 2111.4 49.8 9.36 4536 850 862.4 4.8
10.44 2940 2091 1632 42.6 10.08 3738 850 573.3 4.8
11.16 3108 2091 2448 78.1 10.8 3024 850 1082.9 4.8
11.88 3276 2091 2386.8 85.3 11.52 3192 850 1053.5 4.8
12.6 3444 2091 2397 92.4 12.24 3381 850 1058.4 4.8
13.32 3633 2091 2376.6 94 12.96 3549 850 1024.1 4.8
14.04 3801 2091 2346 94 13.68 3717 850 999.6 4.8
14.76 3948 2091 2335.8 94.4 14.4 3864 850 984.9 4.8
15.48 4095 2080.8 2346 94.4 15.12 4011 850 970.2 4.8
16.18 4221 2070.6 2335.8 94.4 15.82 4158 850 965.3 4.8
16.9 3444 1468.8 1774.8 40.2 16.54 4095 850 828.1 4.8
17.62 3129 2091 2386.8 80.1 17.26 3087 850 1009.4 4.8
18.34 3192 2091 2397 84.1 17.98 3171 850 1048.6 4.8
19.06 3255 2091 2427.6 92.8 18.7 3234 850 1068.2 4.8
19.78 3318 2091 2437.8 94 19.42 3297 850 1073.1 4.8
20.49 3234 1224 1591.2 39.8 20.13 3297 260 671.3 4.8
21.22 3045 1224 1346.4 39.8 20.85 3150 255 519.4 4.8
21.93 2814 1203.6 1264.8 39.8 21.57 2940 255 485.1 4.8
22.65 2583 1173 1224 39.8 22.29 2688 250 499.8 4.8
23.35 2352 1173 1203.6 39.8 23 2457 245 499.8 4.8
24.07 2142 1173 1162.8 39.8 23.71 2247 240 475.3 4.8
24.77 1659 1122 1142.4 39 24.42 2037 240 480.2 4.8
25.49 1365 1071 1091.4 31.1 25.13 1218 250 450.8 4.8
26.19 2016 1173 1111.8 39.8 25.84 1785 245 421.4 4.8
26.91 1785 1132.2 1203.6 39.8 26.55 1911 240 499.8 4.8
27.61 1617 1122 1183.2 37.1 27.27 1680 250 465.5 4.8
28.33 1470 1111.8 1142.4 33.9 27.97 1554 250 470.4 4.8
29.05 1344 1050.6 1122 32.7 28.69 1428 250 441 4.8
29.77 1197 1020 1091.4 23.1 29.41 1260 250 445.9 4.8
30.49 1113 1030.2 1060.8 19.9 30.13 1155 250 313.6 50.2
31.21 1050 1122 1040.4 19.9 30.85 1092 290 254.8 53.4
31.93 1260 1346.4 1050.6 19.9 31.57 1050 405 416.5 39.4
32.65 1491 1132.2 1091.4 33.9 32.29 1239 250 470.4 4.8
33.37 1449 1336.2 1101.6 24.7 33.01 1428 305 338.1 45
34.09 1596 1836 1275 24.7 33.73 1512 655 519.4 19.9
34.81 1911 2029.8 1703.4 48.6 34.45 1722 850 700.7 4.8
35.53 2394 2091 2458.2 79.3 35.17 2142 850 1082.9 4.8
36.25 2814 2091 2213.4 76.1 35.89 2562 850 1048.6 4.8
36.97 3318 2091 2295 84.5 36.61 3066 850 989.8 4.8
37.68 3759 2091 2366.4 91.2 37.33 3549 850 1029 4.8
38.39 4137 2080.8 2335.8 94.4 38.03 3948 850 975.1 4.8
39.1 4473 2009.4 2295 94 38.75 4326 850 926.1 4.8
39.81 4599 1213.8 2172.6 49.8 39.46 4599 850 842.8 4.8
40.53 3003 2091 1683 45 40.17 3948 850 563.5 4.8
41.25 3234 2091 2437.8 80.5 40.89 3129 850 1078 4.8
41.97 3423 2091 2437.8 88.5 41.61 3339 850 1068.2 4.8
42.69 3570 2091 2427.6 94.4 42.33 3486 850 1043.7 4.8
43.41 3696 2091 2397 94 43.05 3633 850 1029 4.8
44.13 3822 2091 2366.4 94.4 43.77 3780 850 999.6 4.8
44.85 3969 2091 2366.4 94.4 44.49 3885 850 984.9 4.8
45.57 4095 2080.8 2376.6 94.4 45.21 4032 850 980 4.8
46.29 4221 2070.6 2386.8 94.4 45.93 4158 850 965.3 4.8
47.01 4305 1458.6 2346 94.4 46.65 4284 850 950.6 4.8
47.73 3108 2091 1999.2 67.7 47.37 3801 850 637 4.8
48.45 3213 2091 2397 82.1 48.09 3171 850 1038.8 4.8
49.17 3171 1224 2437.8 53.8 48.81 3234 850 1078 4.8
49.89 3108 1224 1479 39.8 49.53 3192 255 597.8 4.8
50.61 2856 1203.6 1315.8 39.8 50.25 2982 255 519.4 4.8
51.33 2583 1173 1254.6 39.8 50.97 2709 250 494.9 4.8
52.05 2331 1173 1213.8 39.8 51.69 2436 245 499.8 4.8
52.77 2163 1173 1173 39.8 52.41 2226 240 485.1 4.8
53.49 2079 1173 1152.6 39.8 53.13 2121 240 470.4 4.8
54.21 1974 1173 1142.4 39.8 53.85 2016 240 475.3 4.8
54.93 1911 1173 1122 39.8 54.57 1953 240 465.5 4.8
55.65 1827 1142.4 1122 39.8 55.29 1869 245 460.6 4.8
56.35 1680 1122 1101.6 38.3 56.01 1743 250 441 4.8
57.07 1533 1122 1081.2 34.7 56.71 1596 250 445.9 4.8
57.77 1407 1081.2 1071 33.9 57.43 1449 250 426.3 4.8
58.49 924 1040.4 1071 19.9 58.12 1197 250 450.8 4.8
59.21 861 1040.4 1040.4 19.9 58.85 903 250 294 57.4
59.92 1218 1020 1020 19.9 59.57 903 250 245 58.6
60.65 1701 1122 1050.6 38.6 60.29 1554 250 387.1 4.8