Hi all,
Recently I have noticed my boost is only reaching 14 psi and then tailing off a couple of psi. Previously it would spike to around 21-22 and hold around 15psi. (boost guage)
There is no obvious boost leaks or split vac lines, and i have recently serviced th DV. Also there is an occasional bank 1 Lamda fault, but i've had the fault for years with no adverse effect on performance.
Car is running:
Modded airbox with GC filter
Laguna FMIC
Milltek Cat back
Revo Stage one
Running HB4 and Timng 5, if i turn the boost up it produces less.
I've been out logging tonight,but don't really know how to read the data. Can someone have a look for me please Thankyou
Recently I have noticed my boost is only reaching 14 psi and then tailing off a couple of psi. Previously it would spike to around 21-22 and hold around 15psi. (boost guage)
There is no obvious boost leaks or split vac lines, and i have recently serviced th DV. Also there is an occasional bank 1 Lamda fault, but i've had the fault for years with no adverse effect on performance.
Car is running:
Modded airbox with GC filter
Laguna FMIC
Milltek Cat back
Revo Stage one
Running HB4 and Timng 5, if i turn the boost up it produces less.
I've been out logging tonight,but don't really know how to read the data. Can someone have a look for me please Thankyou
Code:
Group A: '002 Group B: '115 Group C: '118
RPM Load Inj. On Time Mass Flow RPM Load Absolute Pres. Absolute Pres. RPM Temperature Load Absolute Pres.
TIME TIME TIME
STAMP /min % ms g/s STAMP /min % mbar mbar STAMP /min °C % mbar
10.89 1080 67.7 9.02 15.75 10 1480 12.8 1000 1040 10.49 1480 18 0 1050
12.3 1320 74.4 12.3 23.5 11.39 1160 56.4 1000 1070 11.9 1240 18 0 1060
13.59 1600 99.2 12.71 32.92 12.7 1400 87.2 1540 1110 13.19 1520 15 99.2 1200
14.89 2040 127.8 15.58 52.44 14.07 1760 106 1760 1340 14.49 1920 15 99.2 1430
16.09 2520 165.4 20.09 86.58 15.29 2160 139.1 1890 1670 15.69 2360 14 99.2 1810
17.29 3080 175.2 22.14 101.19 16.49 2720 181.2 2000 2200 16.89 2880 15 77.3 2230
18.49 3600 168.4 22.14 116.75 17.69 3240 170.7 1980 2090 18.09 3440 15 74.9 2060
19.79 4120 168.4 23.37 133.08 18.89 3760 168.4 1970 2010 19.29 3920 15 75.3 1990
21.08 4600 163.9 23.78 142.31 20.18 4280 164.7 1940 1980 20.58 4400 17 76.1 1950
22.39 5000 164.7 24.19 157.14 21.48 4720 163.9 1880 1910 21.99 4880 18 78 1880
23.58 5360 156.4 22.96 158.97 22.79 5120 163.2 1820 1850 23.19 5240 19 78.4 1860
24.78 5680 146.6 22.14 158.22 23.99 5440 151.9 1790 1820 24.38 5560 20 77.6 1780
26.09 6000 142.9 22.55 162.89 25.19 5760 146.6 1750 1750 25.59 5880 21 80 1730
27.5 6360 136.8 22.14 164.89 26.49 6120 142.1 1660 1690 27 6200 21 80.4 1670
28.79 6640 130.8 21.32 165.75 27.98 6440 135.3 1600 1650 28.39 6520 23 78.4 1650
29.99 6880 125.6 20.5 163.19 29.19 6720 128.6 1590 1620 29.59 6800 23 76.9 1630
31.18 7040 46.6 4.92 49.47 30.39 6960 123.3 1600 1590 30.79 7040 24 66.3 1580
Code:
Group A: '002 Group B: '020 Group C: '114
RPM Load Inj. On Time Mass Flow Idle Stabilization Idle Stabilization Idle Stabilization Idle Stabilization Load Load Load Load
TIME TIME TIME
STAMP /min % ms g/s STAMP CF CF CF CF STAMP % % % %
12.78 1440 85 10.66 23.5 13.18 0 0 0 0 12.38 118.8 117.9 80.5 1.2
14.07 1720 106.8 13.53 37.5 14.47 0 0 0 0 13.58 130.8 129.9 100.8 99.2
15.27 2120 136.8 17.22 59.25 15.67 0 0 0 0 14.87 145.1 144.8 124.8 99.2
16.47 2600 179.7 22.14 96.53 16.87 0 0 0 0 16.07 156.4 156.7 160.9 83.5
17.77 3200 172.9 22.14 108.58 18.17 0 0 0 0 17.37 163.9 162.7 175.9 76.5
19.08 3800 169.9 22.96 126.81 19.48 0 0 0 0 18.68 164.7 164.2 168.4 74.9
20.26 4240 165.4 23.37 130.94 20.66 0 0 0 0 19.86 163.9 162.7 168.4 75.7
21.46 4680 166.2 24.19 148.72 21.88 0 0 0 0 21.06 161.7 161.2 165.4 76.5
22.66 5040 164.7 24.19 159.67 23.08 0 0 0 0 22.26 157.9 158.2 165.4 78.4
24.07 5360 156.4 23.37 160.69 24.47 0 0 0 0 23.58 153.4 152.2 158.6 77.6
25.38 5640 148.9 22.55 160.36 25.77 0 0 0 0 24.97 148.9 147.8 148.9 76.9
26.68 5840 145.1 22.55 162.03 27.08 0 0 0 0 26.18 144.4 144.8 148.1 78.8
27.88 6080 141.4 22.55 160.36 28.28 0 0 0 0 27.46 138.3 137.3 142.9 80
29.08 6240 138.3 22.14 163.19 29.48 0 0 0 0 28.68 135.3 135.8 139.8 80
30.37 6480 133.8 21.73 164.33 30.77 0 0 0 0 29.88 132.3 131.3 136.1 80
31.57 6680 128.6 20.5 164.03 31.97 0 0 0 0 31.17 130.8 129.9 130.8 76.9
32.77 6920 124.8 20.09 165.47 33.17 0 0 0 0 32.36 130.8 129.9 126.3 75.3
I'll try and turn it up and log it again. Do you think the boost guage could be broken? as it doesn't show a spike, just goes to 15 and stays there before tailing as normal? 
