Need someone to look over data logs + help with boost surge issue

LSL

Luke
Hey, I was told to do some data logs to help figure out my boost surge issue so here they are, I'd be very grateful if someone that knows there stuff has a look over them!

The problem I'm having is it appears once a certain boost pressure is reached it dumps, then boosts back up again, it keeps doing this all the way up the rev range. It does it under part throttle too.
I also checked the adaptions as they can show leaks, they were 0% short term and -1.6% long term.

I done 2 runs for each of the groups all in 3rd gear.


Group A:'002Group B:'020Group C:'115
Engine SpeedEngine LoadInjectionIntake Air MassCylinder 1 IgnitionCylinder 2 IgnitionCylinder 3 IgnitionCylinder 4 IgnitionEngine SpeedEngine LoadCharge PressureCharge Pressure
TIMETimingTIMEAngle DelayAngle DelayAngle DelayAngle DelayTIME(specified Value)(actual Value)
STAMP /min% ms g/sSTAMP CF CF CF CFSTAMP /min% mbar mbar
9.4372023.32.723.259.8300008.9372022.6980980
41.21188081.29.5233.8940.4000040.81176051.91570970
42.622440142.916.3271.1141.71030342.222280123.316901560
43.91312011214.6293.1443.02033643.512920110.516201600
45.133680160.218.7128.4744.3365.366.844.733520106.815601310
46.334360154.120.06126.1745.5365.366.845.934080133.816301740
47.554800152.621.08140.1746.755.35.35.3647.154600152.616401980
48.865360152.623.46154.8947.965.33.85.3648.445200154.116401940
50.175840140.621.76156.7249.354.534.5949.775680138.316301760
51.376280121.818.02146.0650.574.537.58.350.976160123.315701580
73.09180013.504.8172.18000072.58184013.5980990
201.82180025.64.7617.86202.320000201.43180018.8980980
203.14228011812.9257.25203.540000202.722080101.517201270
204.342960160.918.3688.61204.740000203.942720156.416902000
205.553640113.512.9249.19205.950000205.143400160.216201960
206.854320105.312.2487.14207.260036206.454120154.116502300
208.064920124.115.64113.17208.560065.3207.674720139.816401770
209.375560129.317.68134.92209.770365.3208.965360136.816501700
210.576080124.817.68145.58210.99035.34.5210.175880127.815901580


Group A:'003Group B:'020Group C:'118
Engine SpeedIntake Air MassThrottle DriveIgnitionCylinder 1 IgnitionCylinder 2 IgnitionCylinder 3 IgnitionCylinder 4 IgnitionEngine SpeedIntake AirCharge PressureCharge Pressure
TIMEAngle Sensor 1Timing AngleTIMEAngle DelayAngle DelayAngle DelayAngle DelayTIMETemperatureSolenoid Valve(actual Value)
STAMP /min g/s% °ATDCSTAMP CF CF CF CFSTAMP /min°C% mbar
78.54180031.781001277.64000078.0317202095.31000
79.74224057.11100978.94000079.3420801795.31390
80.96292052.9229.410.580.140305.380.5426801554.92020
82.26352064.0676.919.581.460304.581.8633201502280
83.574120129.7294.510.582.6602.304.583.0739201501700
84.914680126.9799.610.583.9802.363.884.3844801669.41370
86.15240140.1799.615.885.2802.363.885.6850801864.31580
87.495840142.471002186.5901.55.3387.0956802263.11630
88.76240143.9210023.387.900.84.5388.361202462.71580
194.0917204.362.414.3194.490000.8193.71760170990
195.41204043.7810014.3195.80003.8194.9118401795.31100
196.72272087.941003197.120003.8196.3224801466.71760
197.923440124.3696.98.3198.330003197.5232001274.91380
199.24416081.6429.811.3199.640033198.8339201260.41890
200.4447608542.420.3200.843337.5200.0445601549.82090
201.765440130.4710014.3202.2535.35.37.5201.2451601853.71960
203.056000158.9410013.5203.472.35.35.36.8202.6558002166.71810
204.366440103.4780.88.3204.880000203.9663202633.31450
 

badger5

www.badger5.co.uk
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its over boosting from request so ecu is cutting it...
pulling a lot of timing also.

N75 failing or split pipe associated with its pipework?

unmapped from the boost requests.

fault codes expected to see with this would be charge pressure maximum exceeded type code..
 

LSL

Luke
Thanks for the reply Bill! I checked all the pipework the other day and couldn't see any splits so I'll grab a new N75, it hasn't been throwing any fault codes though...

Also I've recently cleaned the TB and done away with the PCV system, there was no excessive oil then so I doubt that's causing any problems.
 
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