Evo 4 rs issues

[lancerevomike]

i have no boost gauge but what ever im getting ts very minimal! probably around 0.5bar or something

 

[micevo]

standard is around 0.8, just read you have idle issues also, this does point to a boost leak..
i had the same a while back mine was only boosting 1.6 checked all conections to hoses couldnt find a thing, made a pressure tester pumped it up and then could hear the leak after it was presured to about 1.7/8ish bar, it was only a clip what needed replacing then i was back to full boost, and idle was back to normal,

 

[lancerevomike]

idle is fine untill i stop very quickly and someone has posted saying that this is because of the aftermarket bov thats been installed.

 

[micevo]

you tried takin your bov off and blocking the pipe off, as that might be leaking..

 

[lancerevomike]

ive not no, but where would it leak from? its still dumping when i come off revs coz i can hear it

 

[micevo]

may not be holding the pressure, but it would still vent, what make is it?

 

[lancerevomike]

ive checked wether its tight and it is. or do you mean its leaking from inside?

i dont know the make im afraid as it came with it on

 

[micevo]

yes could be the diafram, or the spring worn, or just old

 

[lancerevomike]

wouldnt it make a loud boost leaking/wooshing noise?

going to give this a shot in the morning though definatley

 

[micevo]

no mate you wouldnt hear it through all the other noise i would say...

 

[lancerevomike]

right then i will try this in the morning first thing, what else you think it could be if it isnt that, ive got a feeling it isnt but im hoping it is as its a relatively cheap easy fix

 

[micevo]

if its not boosting.... turbo ****ed... boost leak... hoses not plummed correctly... hole in intercooler... ****ed bov...
does it drive ok other wise?
idle issues.... boost leak... TPS not set correct... vta bov.. but there again your idle could just need resetting if youve disconnected battery,
if i were you i would get a boost gauge plumb in a manual controller and block the bov off and see what happens, if still the same least youve eliminated those items..

 

[lancerevomike]

drives fine just not enough boost

checked turbo for play in shaft and its fine
vta bov is the idle issues when stopping quickly
ive re-plumbed all the boost pipes excluding intercooler and still same
only thing ive not checked and did not route around is the bov

 

[micevo]

block the bov off mate, there int much else i can think off at moment,
you have the little brass restictors in actuator and j pipe pipes??

 

[RsvRob]

Right to start of YOU NEED TO LISTEN to what we're saying. Don't wanna sound rude but all the answers we have given you will find your problem.
Craig gave you all the right things to test as he had to do the same and eventually listened to me and chris and got it sorted
Get a boost gauge fitted.
Plumb turbo to actuator and test drive to see what boost you are truely getting...STOP guessing.
Boost leak test. It could be leaking from any pipe/gasket/part from intake pipe to intake manifold.

Start with this then come back with your answers/questions

 

[fq-craigus]

Right to start of YOU NEED TO LISTEN to what we're saying. Don't wanna sound rude but all the answers we have given you will find your problem.
Craig gave you all the right things to test as he had to do the same and eventually listened to me and chris and got it sorted
Get a boost gauge fitted.
Plumb turbo to actuator and test drive to see what boost you are truely getting...STOP guessing.
Boost leak test. It could be leaking from any pipe/gasket/part from intake pipe to intake manifold.

Start with this then come back with your answers/questions

+1 if you haven't pressurised the system you will not know if it's leaking or not.

Like rob said I was pulling my hair out.

Also I will say when you removed the pipe off the actuator and went for the drive was the hose still going to the standard solenoid? That could be why u had no more boost, if not you may need to get your wallet out

 

[lancerevomike]

right guys got it sorted. It was the actuator after all lol. Thanks for the replies