Boost Issues Rb20det / Idle Problem

[d3vic3]

OK,

For example, if i go full throttle in 2nd up to 6k rpm and change into 3rd and full throttle again, car will be really slow to come onto full boost again. it will hit 5psi and slowly creep up to 12psi in about 10sec.

if i do the same but do a slow gear change (about 5sec between gears) and plant it again boost comes on as normal.

car will also boost normal when going from partial to full throttle in any gear.

I thought it was a fuel delivery issue, so i replaced the fuel pump a couple of months ago and that seem to have fixed it. but now the problem is back again.

I have tested the fuel pressure and it does not go below 38psi during the above mentioned scenarios.

I have also run injector cleaner through it. twice

New plugs

New fuel filter

cleaned air filter.

another thing that has come back is rpm dips and rises. When im slowing down, for example going into drive way, when i put the clutch in and go into 1st gear the revs will sometimes drop below 500rpm and come back up again (sometimes it will stall). other times after start up it will sit up on 2000 rpm and will only drop back after i tap the accelerator.

ECU has code 55(no errors).

Car has the following mods:

K&N pod

FMIC

rb25 turbo

3" turbo back exhaust

running 12psi

walbro 255l fuel pump

Is the car just in need of a tune?

TPS dodgy?

thoughts?

maybe i have 2 separate issues here...?

[d3vic3]

SOLVED.

seems as thought the boost controller was stuffed. it was installed correctly.

Took it out and the car boosted quickly through the whole rev range. should of checked it sooner...

can only assume it was leaking causing idle issues and getting stuck after full boost during a quick gear change.....