No2 Turbo intermittent. O.k in TTC. EGBV VSV and Actuator needed?

[Guest Bainesy36]

Evening all!

 

I've been scouring the forums for the intermittent fault of No2 Turbo not coming in sometimes, but if you lift off the accelerator and back down again it spools up o.k. Seems to be caused by No1 turbo working against No2 and prevents pre-spooling of No2.

 

Anyway, I've switched to TTC mode and No2 spools up fine everytime and the car drives fine for now (although a bit noisy, BPU with Blitz Nur Spec exhaust). From the post below, I'm thinking of sourcing another EGBV VSV and Actuator as all the turbo hoses have been replaced fairly recently with new 'Blue' ones and I don't really expect a leak from any of them and the Pressure tank must be o.k?

 

http://www.mkivsupra.net/vbb/showthread.php?t=81617

 

How many people have replaced these items to cure this common fault, or what else has cured it? Do you think I'm on the right track or have I missed something?

 

Thanks to Ian C for the info' from the link below, allowing me to work out which bits were which on the car as it's all new to me. http://www.mkivsupra.net/vbb/showthread.php?t=35926

 

Cheers,

Nige.

[Guest Bainesy36]

Bump?

[Guest Bainesy36]

After further investigation in the Freezing cold tonight, I tested the resistance of the EGBV VSV and got a healthy reading of 23 Ohms. I then decided I'd remove the EGBV Actuator, before realising where it was. Doh! Right at the back of the engine bay hidden by a multitude of pipes and engine etc.

 

Whilst thinking "How the hell do I remove that?" and shining a torch down there, I noticed that the small flexible hose going from the hard pipe off the EGBV VSV to the actuator had a split in it! This must be the problem. Approx' 1 hour later, I managed to remove the hose, trim the end off with the split and re-fit it again.

 

Now all I need is some good weather to see if it has cured the intermittent 2nd turbo problem as there was no chance I was going testing in this!

 

Fingers crossed,

Nige.

[Sheefa]

Nige,

 

I had a problem with my number 2 only coming online intermittantly. It turned out to be two knackered solenoids in the tubbie.

 

Maybe worth a shot? Mine's all cured now thanks to Chris.

 

Good luck mate

 

Greg

[Guest Bainesy36]

Thanks for that Greg.

 

After reading up on the possiblities of the fault and the fact that the car boosts fine in TTC mode, I'm quite confident that I've sourced the problem. The EGBV solenoid tested out fine as above, but due to the split in the hose to the EGBV Actuator, I'm hoping that this is what was causing the intermittent operation of it.

 

Looking at the weather forecast, I might not be able to try this for some time, but I'll keep you posted.

 

Cheers,

Nige.

[Mike M]

Hope you get it fixed mate, I had an air supply hooked up so I could test the EGBV actuator and check the whole system for leaks. I quite liked working on the system tbh once I'd found all the bits and pieces.

[Jspec Germany]

Bainesy - Did this fix your problem? Can you point me to where your problem was?

[meister_raul]

I think i am having the same problem

[Scooter]

Some more recent info here, definitely fit new link pipes if yours are original.

 

http://www.mkivsupra.net/vbb/showthread.php?343594-sequential-issue-and-going-ttc-ideas-please&highlight=sequential

[Samurai 20V]

Sounds like the vac hoses connected to the IACV VSV.

I had the problem twice and solved it changing these hoses.