Had my 99 remapped by andyF recently(full decat & sti filter), had it on the rollers last weekend and it only made 250 brake, but worse only 210 lb torque!!!!

The guy on the rollers said I was losing boost.

What is the most common reasons for loss of boost?
Is it either a leak or the turbo?

need to resolve the issue as my big happy face has turned a little sad!!!!!

Any ideas gents?

 

worth cheacing all the pipes over, incase one has come lose or split.

what rollers did you go on?

i think if there is a boost leak, it will run eather rich or lean at the top end (righ i think)

did the rr bloke monter anything when doing the rr or was it just a basic power run?

 

Was on DynoDemons in neston, know they are blob on as r kids bmw 540 did 285/330 which is the book figures.

dunno what he monitored, think it was just the air intake temp as there where a few wires attached, dunno coz it was my first time.

Will check all the pipes, is there any 'tests' that can be done to try an diagnose where the fault lies!!!

cheers