have boost creep but dont know y

[level10a/t93tsi]

i have my 14b boost set to 18psi but when it hits it will go to 20psi then go back to 18psi. i dont know y its doing it but any info will help.
my mods are
swaped the auto turbo for the 14b/tdo5h
turbosx bov with 4 washers in it
autometer A/F & boost gauges
and a full built level10 tranny
an ExM mbc set to around 18psi but it hits 20psi then gose back to 18
and holds their

i still have stock exhaust & DP
every thing else is stock also
P.S
what HP is the 14b good for with 18psi?

 

[L2RTSiAWD]

I doesn't sounds like creep. It sounds like boost spike which is common on MBC's.

 

[doug]

Yeah, Cyberpimp is right (as always). How do you have the MBC hooked up? Many people have better luck at controlling spiking by hooking it up between the turbo and wastegate instead of using the BOV line.

 

[CanadianTSi]

Spiking to 20psi on the stock fuel system is not exactly a good thing...If i were you i would turn it down to 15 or so until u get a new fuel pump