Got a bit of a problem when cossie comes on boost,it feels like its pulsing,like its hitting its boost limit and the ecu is bleeding it off,its fitted with a stage 1 chip so should do 1 bar but it hits about 10 psi and then starts to fluctuate between 10 and 15psi,never holds a steady reading,boosts up then drops down,its not harsh,just anoying.
Every thing on the engine is standard spec ,uses a 2wd l6 ecu,standard map,amal valve ect.


Thanks.