cool, im logging tonight with Lee so will post results up tonight and see what you guys think - Fingers crossed its the N75 that is buggered!
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im gonna do some logs today too 
no problems i just got nowt to do today till work. may check inlet temps just for fun
no problems i just got nowt to do today till work. may check inlet temps just for fun
What block is inlet temps on as I wouldn't mind doing that too just out of interest.
I have to wait till Sat night now do log mine but I'm now thinking it's a boost leak as I'd have thought the valves/sensors would cause the boost to be erratic whereas it's constant. Maybe it was OK before as there was less pressure but now with more pressure requested it's being lost. I'm suspecting a blow in the FMIC piping somewhere OR the intercooler is second hand, could it have a hole in it? lol it looks OK though. I thought I heard hissing when the car was at idle but I think it might have been the alternator belt. I need a good look in daylight with a mate opening the throttle a bit.
I have to wait till Sat night now do log mine but I'm now thinking it's a boost leak as I'd have thought the valves/sensors would cause the boost to be erratic whereas it's constant. Maybe it was OK before as there was less pressure but now with more pressure requested it's being lost. I'm suspecting a blow in the FMIC piping somewhere OR the intercooler is second hand, could it have a hole in it? lol it looks OK though. I thought I heard hissing when the car was at idle but I think it might have been the alternator belt. I need a good look in daylight with a mate opening the throttle a bit.
block 118 covers inlet temps
by the way you describe it mate it really does sound like a boost leak! i remember setting off from home for GTI international, and it took me a while to realise my car wasnt boosting 100% so i pulled over, opened the bonnet and could hear the leak, and within 5 mins i'd noticed one of the vac hoses was disconnected (it hadnt popped off i'd just forgotten to connect it the night before when i was detailing)
car was instantly improved, but it took me ages to notice that the car wasnt right.
bit late telling u this now i know, but usually its wise to get used intercoolers pressure tested. but tbh if it was the core you'd know, it would be pretty awful infact.
actual vs requested log can confirm boost leaks..but tbh easiest thing to do is just replace all the old tatty vac hose with new silicon vac hose from forge or someone. cheap and it rules it out. logs first though
by the way you describe it mate it really does sound like a boost leak! i remember setting off from home for GTI international, and it took me a while to realise my car wasnt boosting 100% so i pulled over, opened the bonnet and could hear the leak, and within 5 mins i'd noticed one of the vac hoses was disconnected (it hadnt popped off i'd just forgotten to connect it the night before when i was detailing)
car was instantly improved, but it took me ages to notice that the car wasnt right.
bit late telling u this now i know, but usually its wise to get used intercoolers pressure tested. but tbh if it was the core you'd know, it would be pretty awful infact.
actual vs requested log can confirm boost leaks..but tbh easiest thing to do is just replace all the old tatty vac hose with new silicon vac hose from forge or someone. cheap and it rules it out. logs first though
bit late telling u this now i know, but usually its wise to get used intercoolers pressure tested. but tbh if it was the core you'd know, it would be pretty awful infact...
actual vs requested log can confirm boost leaks..but tbh easiest thing to do is just replace all the old tatty vac hose with new silicon vac hose from forge or someone. cheap and it rules it out. logs first though
I've checked all the vacuum pipes as I've replaced them already the other week with 3mm silicone hose when I had the secondary air flow problem. I hope the ID isnt too restrictive but then I wouldn't expect that kind of pressure loss from 1mm difference. The intercooler looked fine, only covered 10,000 miles and just a few bent fins, that's all I could see. The only hose I didn't get to replace (as I ran out) was the one from the FPR to the manifold.
Just for fun - i wish i had the same feelings towards using Vag Com - Although Im sure ill get in to it
i use 3mm so the ID is fine
as u have a laguna ic dont u? then im reluctant to mention any dodgy pipe work may need checking.
as it is we can wait for logs to rule out second guessing
as u have a laguna ic dont u? then im reluctant to mention any dodgy pipe work may need checking.
as it is we can wait for logs to rule out second guessing
Not being a whizz but i thought restricting the air even by a small amount can have an effect - I think the Vacuum pipes were 4mm
Code:
Friday 1 December 2006 12:51:47
6K0 906 032 AA 1.8L 20VT EU3 0002
Group A: '020 Group B: '118
Idle Idle Idle Idle RPM Temperature Load Absolute Pres.
TIME TIME
MARKER STAMP CF CF CF CF STAMP /min °C % mbar
0.31 0 0 0 0 0.61 1720 27 87.5 1050
0.92 0 0 0 0 1.21 1880 26 95.3 1190
1.51 0 0 0 0 1.81 2080 24 95.3 1370
2.11 0 0 3 0 2.41 2320 24 95.3 1620
2.71 0 0 3 0 3.01 2600 23 95.3 1880
3.31 0 0 3 0 3.61 2920 23 83.5 2210
3.91 0 0 3 0 4.21 3280 23 82.4 2420
4.51 0 0 2.3 0 4.81 3600 23 84.7 2340
5.12 0 0 2.3 0 5.42 3960 23 85.9 2330
5.72 0 0 2.3 0 6.02 4280 24 86.3 2270
6.32 0 0 2.3 0 6.62 4600 24 86.3 2190
6.92 0 0 1.5 0 7.22 4880 24 86.7 2080
7.52 0 0 1.5 0 7.82 5120 26 88.2 1990
8.22 0 0 1.5 0 8.52 5400 27 90.2 1920
8.82 0 0 1.5 0 9.12 5600 27 91.4 1850
9.42 0 0 1.5 0 9.72 5800 29 92.5 1790
10.02 0 0 1.5 0 10.32 6000 29 92.9 1750
10.61 0 0 0.8 0 10.92 6160 30 91 1710
Last edited:
thanks for the results - what is block 20 showing?
as for block 118 - i assume everything is ok with your car and the percentage reflects that - does BHP effect the percentage or should the percentage reading always be near abouts the same as yours regardless of power?
as for block 118 - i assume everything is ok with your car and the percentage reflects that - does BHP effect the percentage or should the percentage reading always be near abouts the same as yours regardless of power?
ok thats my log above, being stupid i done a really good log in 3rd gear, then tried the same in 2nd gear but it appeared to overwrite the first log so thats all i came home with usually id use 3rd gear.
block 020 display cylinder pull,
timing looks ok, theres abit on cylinder 3 to may be worried about but iv had 2 coilpacks pop on me in the last month so i wouldnt be surprised if that one is next but il leave it an see. tbh a 3 max isnt much to be concerned about, any more though and id really want my timing knocked down.
the second block looks nice to me, temps dont go above 30 and thats going into the red zone. duty peaks at 92% up the top of the rev range, so the WG isnt stressed.. boost looks 'ok' peaks at 21psi and with 14psi at 5k, although bit disappointed that its only about 11psi at 6k. maybe i backed off or maybe its cos it was in 2nd gear. but generally im pleased with that.
sorry to clam this thread up with my junk..but hopefully it will help when you guys are doing your own logs
usually id use 3rd gear.block 020 display cylinder pull,
timing looks ok, theres abit on cylinder 3 to may be worried about but iv had 2 coilpacks pop on me in the last month so i wouldnt be surprised if that one is next but il leave it an see. tbh a 3 max isnt much to be concerned about, any more though and id really want my timing knocked down.
the second block looks nice to me, temps dont go above 30 and thats going into the red zone. duty peaks at 92% up the top of the rev range, so the WG isnt stressed.. boost looks 'ok' peaks at 21psi and with 14psi at 5k, although bit disappointed that its only about 11psi at 6k. maybe i backed off or maybe its cos it was in 2nd gear. but generally im pleased with that.
sorry to clam this thread up with my junk..but hopefully it will help when you guys are doing your own logs
no duty has no reflection on power i dont think? a good simple definition i think would be that it represents how hard the waste gate is working to meet the requested boost. if that makes any sense
Cool! I'm doing some logs Saturday night but I'm so busy at the moment I have no daylight hours spare. Thanks a lot for the offer, where are you again? Exeter?
Results Are In!!!!!!!!!!!
Right, have a butchers at these(slightly out of line but you get the jist of it)....
Going from what i know, 115 is clearly showing im loosing boost somewhere...trying to eliminate my options by measuring 118(N75 Duty)
In comparison to Acid results, my temp is alot higher - is this because i dont mine in 3rd gear whereas acid's was done in 2nd? - as for the percentage, im sooo lacking - right, can i assume i need to change the N75 Valve?
Right, have a butchers at these(slightly out of line but you get the jist of it)....
Code:
Friday 1 December 2006 19:55:01
6K0 906 032 1.8L R4/20VT SEA 0002
Group A: '115 Group B: '118
RPM Load Absolute Pres. Absolute Pres. RPM Temperature Load Absolute Pres.
TIME TIME
MARKER STAMP /min % mbar mbar STAMP /min °C % mbar
0.6 1720 73.7 1720 1020 0.9 1320 30 10.2 1080
1.5 1520 100 1860 1180 1.8 1560 29 11 1220
2.4 1680 110.5 2000 1290 2.7 1720 28 15.7 1320
3.3 1800 114.3 2090 1350 3.6 1880 27 20.4 1360
4.2 2000 117.3 2160 1380 4.5 2040 27 24.3 1390
5.3 2200 119.5 2120 1410 5.6 2240 27 27.5 1410
6.19 2360 121.1 2090 1430 6.49 2440 27 29.8 1430
7.09 2520 123.3 2040 1440 7.39 2600 28 31.4 1450
7.99 2720 121.8 2000 1440 8.29 2760 29 30.2 1440
8.89 2880 120.3 1970 1430 9.19 2960 29 28.6 1430
9.79 3080 123.3 1930 1420 10.09 3160 29 28.2 1420
10.69 3280 123.3 1910 1420 10.99 3360 30 28.2 1420
11.59 3480 124.8 1880 1420 11.89 3880 30 28.2 1410
12.49 3640 123.3 1870 1410 12.79 3720 31 28.2 1410
13.39 3840 124.1 1860 1410 13.69 3880 32 28.2 1410
14.29 4000 124.1 1860 1400 14.69 4080 33 27.1 1400
15.29 4160 124.1 1840 1390 15.59 4240 33 23.9 1380
16.19 4360 124.8 1820 1380 16.49 4400 33 21.2 1380
17.09 4520 127.1 1800 1370 17.39 4560 34 18.4 1360
17.99 4680 127.1 1800 1350 18.3 4720 34 15.3 1340
18.9 4840 125.6 1790 1340 19.29 4920 35 12.5 1330
19.89 5000 124.8 1780 1330 20.2 5080 36 10.2 1330
20.89 5160 123.3 1780 1330 21.2 5240 36 10.2 1330
21.9 5320 122.6 1770 1320 22.29 5400 37 10.2 1320
22.89 5480 121.1 1780 1330 23.2 5520 37 10.2 1320
23.9 5600 120.3 1780 1310 24.19 5640 39 10.2 1310
24.8 5560 107.5 1000 1260 25.18 4960 37 0 1230Going from what i know, 115 is clearly showing im loosing boost somewhere...trying to eliminate my options by measuring 118(N75 Duty)
In comparison to Acid results, my temp is alot higher - is this because i dont mine in 3rd gear whereas acid's was done in 2nd? - as for the percentage, im sooo lacking - right, can i assume i need to change the N75 Valve?
I'd say that the N75 is goosed, or the wastegate itself is
but do check all the vacuum piping first
you're wasting your time doing logs in 2nd gear, and argueably 3rd as well though.
but do check all the vacuum piping first
you're wasting your time doing logs in 2nd gear, and argueably 3rd as well though.
i have a front mounted intercooler bud, this will make the difference in intake temps
its possible that the wg duty is low because you have a rather large boost leak. but then you might be not making your requested boost because you have a feckled n75.
if i was you id just go buy one cos they are only about 30/40quid for a stock valve. rule it out and then you know
its possible that the wg duty is low because you have a rather large boost leak. but then you might be not making your requested boost because you have a feckled n75.
if i was you id just go buy one cos they are only about 30/40quid for a stock valve. rule it out and then you know
well what gear do you do logs in when you have to? redline in 4th would be touching 115-120mph
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