R34 Help Over Boosting And Dont Know Why

[gttiwanna]

i have an r34 sedan

mods are:

front mount full 3in exhuast and 3in cat, pod filter no after market ecu

now the issue is that no matter what i do it always seems to wanna boost to at least 1bar i had a manual boost controll on it didnt fix the prob and just brought a new hdi ebc-r

and same thing isnt controlling the boost at all just seems to do what it wonts and answers people?

i have done a boost leak test on the cooler pipes once before and wasnt leaking

please help i wanna rev my car past 5 but hits boost cut/fuel cut hmmmmm??????

[jjman]

if you have ruled out boost controller as an issue then either an aftermarket actuator or your actuator is jammed.

Is it a split dump dump pipe? they have been known to foul the wastegate flap...

[gttiwanna]

it is a a split dump but was doin this before i put on the dump pipe and the dump made it worse? and i can pull open the wastegate with my hand whilst connected so it moves

[jjman]

maybe the actuator diaphram is fkd...

If your wastegate can open then somewhere the signal of boost pressure in ur vaccum lines is not being translated to the actuator/opening the actuator properly...

[gttiwanna]

so mite have to look for another wastegate actuator hey ? ok ill have to try that

[RB25DETC33]

Might sound like a silly question but do you have the vac lines connected correctly to the solenoid and actuator, I agree with JJMAN (I had this issue also at one stage), could be an issue with the boost pressure signal to the solenoid which is causing the wastegate to remain closed. Maybe a pic of your val line setup?

[gttiwanna]

Uploaded with ImageShack.us

did it the way hdi install guide told me

>>>>> way is goin to wastegate act

^^^^^^^^ way is goin to the turbo elbow

[gttiwanna]

http://www2.hybrid-power.com/installation/installation/hdiebc-rjpg.pdf

[gttiwanna]

So changed the wastegate actuator still doin the same thing anyone else know what's goin on ?

[mad082]

Why does the hose do a loop out of the cooler hose?

And does it boost up that high with no boost controller on there at all?

There seems to be an aweful lot of hoses in that pic. Try running a new hose from the intake plenum (such as.from the bov feed) straight to the wastefate and pull all those other hoses off and block them and see what happens

[RB25DETC33]

What is your boost controller set to in terms of pressure or percentage of boost?

Try disconnecting the solenoid an run a hose directly from the turbo to the waste gate do a run up the street. See if the new gate opens. If it does then maybe something to do with ur solenoid.

If they dont work try using another source of boost pressure further along the cooler piping like near the bov.

[gttiwanna]

The hose coming out of the cooler piping is for the steering

As the piping I got didn't have a nipple I made one up

As the factory hose went there

I don't know what the controller is set at coz no matter where I set it it always boost to 1 bar or lil bit higher

And on that note changed my bov back to an after market one yesterday and its not very loud at all

And it use to be very loud

And the boost solinod is brand new only 1 day old so can't be broken

[gttiwanna]

So I just put the vacum line just from the turbo to the wastegate with no boost control and still the same should be

Max 10psi min 5psi but hit .9 bar hmmmm

[gttiwanna]

O and the wastegate opens when I still there revving it so that mite be outta the question now lol

[gttiwanna]

Question would a exhuast manifold leak make this happen ? Maybe one of the bolts have broken ?

[RB25DETC33]

Well the wastegate should open when u hit boost pretty much straight away when connected directly to a pressure soucre as there is no solenoid valuve in the way. A manifold leak wont increase boost pressure as that is escaping exhaust not reaching the turbo.

What kind of turbo have u got fitted?

If the gate is still opening when ur on throttle and ur still make stupid boost level sounds like there could be a blockage preventing the exhaust from leaving through the dump.

[RB25DETC33]

Well the wastegate should open when u hit boost pretty much straight away when connected directly to a pressure soucre as there is no solenoid valuve in the way. A manifold leak wont increase boost pressure as that is escaping exhaust not reaching the turbo.

What kind of turbo have u got fitted?

If the gate is still opening when ur on throttle and ur still make stupid boost level sounds like there could be a blockage preventing the exhaust from leaving through the dump.

[gttiwanna]

Standard op6 turbo buddy

[gttiwanna]

so heres a new one it was pretty average day hotish and i decided to block of the map/boost sensor(one on the back fire wall) and the boost was able to be controled

WTF???

so meaning is that thing stuffed ot what?

[jjman]

you mean the one that goes to your EBC? or the stock dash guage?

If its the one to ur EBC then it probably got a leak in it somewhere along its line, or the EBC is stuffed.