boost problem

[maxkhor]

the other day i uped the boost on my r33 so that it know runs around 10-11 psi but dont know if this model has a boost cut or i have some bad fuel, or maybe time for some knew plug. once it gets boost of 10-11 it splutters and pops through the exhaust. the plugs have done 25000 kms and the fuel im using is mobil.

i face the same problems. but after i use the pressure gauge set at 1 bar, then connect to the fuel line. The problem coming out...it is the fuel pump, the original fuel pump is too old...low working rate...its the time to change 1...then....i solved.~~!!