Boost Problem

[lanxter]

boost problem Well today me and a friend install me a new HKS Evc 5 boost controller but am having problems with boost in general.

We cant get the actuator pressure to go below around 10 PSI.

with the boost controller turned off and the HKS Actuator arm wound fully out im still getting 10psi of boost?

we tryed disconnecting the Actuator and having it fully open and im still getting 10psi?

with it fully closed i get fuel cut by 3k revs.

any ideas?

all we can think of is a damaged or faulty wastegate? ?

[adz_sportif_turbo]

i dont understand what did you have fully open then fully closed??

[Glanza_cl]

you cant hit fuel cut on 10psi thats around 0.6-0.65 thats almost stock boost. where are you getting your psi reading from??

if hitting fuel cut, your clearly boosting more then 10psi so having the actuator disconnected shows it can boost more.

whatever you are taking the reading from might be playing up.

wind the actuactor out as far as possible (while keeping some preload on the actuator arm so it actualy can open the wastgate) then reset the EVC and put in your disired boost level (example 10-11psi) this should work fine and you should definatly with the EVC on/off notice a difference.

[lanxter]

right no i didnt hit fuel cut at 10psi

when i had the wastegate closed ( this was done by removing the actator and having it held closed with a bracket) i hit fuel cut.

when we had the waste gate fully open (again done with a bracket to keep it open) i was getting 10psi of boost.

with the actuator connected no matter how much i would the arm out i was still getting 10psi of boost and in 3rd creeping to fuel cut.

me and a friend wound the actuator arm out as far as it would go and i was still getting 10psi.

Have measured the boost using the evc itself and also using a boost gauge and both are giving the same readings.

kinda stuck on ideas apart from damaged waste gate?

checked the vac pipes and all seams fine.

Took the boost readings from the inlet after the throttle body