maREX7

So I had my all intake pipes off, Ive connected only charge relief valve and blow-off valve back, car is in stationary on handbrake idling, I can fell the suction from the primary turbocharger pipe if I rev a little, but at all the same time I feel the pressure coming out from secondary turbocharger pipe OUT, and its huge!, is there something to look in to or thats normal etc?

maREX7

Alright been told its Charge Control Valve stuck open, can anybody advice where around the motor to look for solution to fix this? It should remain closed until 4500rpm and its stuck open from start... can it be stuck open because car is not being driven, just in stationary ?

cr-rex

iTrader: (114)

the secondary turbo vents until crossover. so your sitiation is normal. the charge relieve valve closes when the secondary turbo comes on. so it being "stuck open" at idle is an indication of functioning part.

if you want to test it the cool way then leave the crv open and drive, you will hear it hiss then it stop when you reach 4500rpm or whenever your secondary comes online.

maREX7

I dont get it. If it stays open until crossover and then closes at the cross-over point (4500rpm) if it closes it doesnt let air in from the secondary turbocharger in to Y-pipe did you do a typo or how does it go?

Or does it close once I start driving and opens after crossover at 4500rpm>?

cr-rex

iTrader: (114)

The charge relief valve VENTS air from the secondary turbo since your turbo set up is sequential. Meaning 1 turbo THEN 2 turbos. During the lower rpms only one turbo works and that is the primary. While you are boosting in sub 4500 the air from the secondary turbo is vented by the open charge relief valve.

When the crossover occurs the charge relief valve closes and stops venting the air from the secondary turbo thus allowing it to produce boost in sequence with the primary.

Does that make sense

maREX7

It does, but what I meant, that my Charge Control Valve (butterfly in Y-Pipe is stuck open when I start the motor). I rev it up while in parking, and more than half compressed air goes out trough the BIG PIPE OF THE AIR INTAEK OF THE SECONDARY TURBOCHARGER, not only trough charge relief valve as you describe.

cr-rex

iTrader: (114)

Ohhhhhhhhhhh........ i understand now. That interesting. No idea what to say other than replace the thing with the vacuum line or double check your vacuum routing. Something is getting air that isnt supposed to or something has failed

cptpain

iTrader: (1)

You'll need to remove your Y-pipe and clean the entire butterfly and actuator assembly to make sure everything moves freely. Also, it would be a good idea to get a new o-ring as well.

You'll also need to test if the actuator is at fault as it works on boost/vacuum reference to keep it closed until transition. Possibly tracing down to its particular solenoid as well.