Help!!! advice needed, error 34 and no ooomph!!!

[thomp1983]

Inside the circled part of the picture is a nut, im guessing holding the turbo bracket, just to it's left looks like a snapped stud.

I can't remember if the arm fouls on the outside of the decat or the wastegate catches on the inside, if you do the test linked earlier it should be fairly obvious

[2mad]

Or are you saying there is something inside the downpipe thats sticking?

Yes this ^^ the wastegate .. Helped a chap diagnose this recently .. dont know how he fixed it though .. people should always follow up .. would make life easyer.

[Lee H]

I have two downpipe gaskets on mine to stop the wastegate sticking open.

[Lee H]

Blue cylinder is something to with TVIS i think.

[2mad]

Blue cylinder is something to with TVIS i think.

Yep, tvis vacuum tank

[masterbateson]

Just read up on T-vis it went a bit over my head, but from what i gathered its a variable breathing system, in my abbreviated simplistic understanding of it.

Does it do what its suppose to or not?? I may have imagined this, but do some people remove the T-vis???

If so do they replace it with something? or just bypass it or blank it?

Yup see what your on about now re the broken stud mr thomp no leaking from there fortunately.

[2mad]

My tvis was bypassed .. cant say as it slowed me down

[masterbateson]

I wish i could of seen where the cat was before the decat was fitted, as i cant picture in my mind where the decat is?
I would have expected the decat to be at the bottom just behind the back box?

Am i getting confused by this decat business is it just the downpipe i need to worry about re this sticking waste gate?

[thomp1983]

aslong as the tvis setup isn't causing any leaks id ignore if for now.

you won't get any leaks from that broken stud im fairly sure it's the turbo support bracket it just bolts to the block and underside of the turbo, the question is why's it been off?

is there paperwork for the turbo being replaced or any work in that area? and whilst that particular broken stud itself wouldn't concern me id be taking a close look at all your exhaust manifold studs to check if any of them are snapped off as that bracket coming off usually suggests the turbo or exhaust manifold or both have been off.

there may be no problems at all and it's just one broken stud but you should look now before an issue occurs. there's every chance it was removed when fitting the decat, i seem to remember getting the decat in and out is awkward especially if you have an oil filter sandwich plate fitted.

without trying to sound sanctimonious you need to understand what your looking at and what it could be telling you not just poke around hoping the issues present themselves.

im still putting my money on the decat being your main issue, you can tell quite quickly with a hand vacuum pump as if it's stuck open you won't be able to build a vacuum, or it'll suddenly clunk closed and then you'll get vacuum. another option is remove the decat and look inside it there will likely be marks in the casting where the wastegates been up against it.

[2mad]

I've got a downpipe that is sweet .. i could sell you .. very large bell mouth , no wastegate hitting problems .. had it on the car 5+ years .. great downpipe .. if your interested pm me .. and ill sort you out some pics

[thomp1983]

I wish i could of seen where the cat was before the decat was fitted, as i cant picture in my mind where the decat is?
I would have expected the decat to be at the bottom just behind the back box?

Am i getting confused by this decat business is it just the downpipe i need to worry about re this sticking waste gate?

google images is your friend, shows clearly what a turbo decat pipe looks like, and if you think about it how could the wastegate on the turbo at the front of the engine get caught on a pipe by the backbox?

[masterbateson]

I've been outside and weighed the job up.
It looks to me like I am going to have to take the exhaust manifold offalong with turbo and down pipe to sort this out properly.

I tried moving the wastegate arm/rod by hand and with pliers and it wont budge, I don't know if someone out there has done this b4 and knows if you can move it by hand?

Anyway dont have a pump to test the actuator so investigation abandoned for tonight.

As it happens tho, mate who sold the car had some bits for sale i bought off him.
One of which was a nice new shiny stainless exhaust manifold with gasket and also a brand new larger stainless intercooler.
So may be able to kill 2 birds with one stone.

[Hez]

if the exhaust manifold is a ebay jobby, i would just stick with the standard manifold its good for big power and wont crack like a stainless assuming it a cheap one.

[masterbateson]

Funnily enough someone else has said that, I bought it to see what the local expert reckoned to it, if its no good it can go on gumtree or ebay.
I only paid 40 for it and its still in its bag brand new.

[2mad]

Yeah go for the intercooler .. had one myself .

[jimGTS]

The actuator arm/rod won't move by hand! Unless you got a very good amount of grip/force on it. Given the location, this is near impossible.
It needs 7psi of pressure to move.

Hence why people are suggesting a pump.

A decat/downpipe on a turbo is huge unit. Completely different to what you'd recognise on an Na car.
It comes directly off the turbo, curves round the engine and joins the exhaust.
It's not just a nice easy to get too foot long pipe like you'd find on many a NA.

Is quite a job to get off.

What's the deal with the blue pipe? There a t piece on there? Is that open? T piece doesn't look 'sealed'? Could just be the picture.
It's never a great idea to fit another dump valve and leave the stock there. Asking for problems.

It could be leaking, which would cause lag. Any leak with cause lag.

[thomp1983]

He has a nice shiny new manifold that was ready to go on and at least one of the nuts you'd remove to fit that manifold is snapped, what are the odds he's already had a go at the job badly? Id chrck and see if any of the exhaust manifold studs are broke

[masterbateson]

On the T piece of the slim blue pipe which is going to the aftermarket bov, the spare part of the T piece is blocked off.Originally when i looked at it, the whole lot was just wrapped in insulation tape.

I unwrapped it, and the spare outlet of the t piece is now blocked with a tight fitting screw and sealed with glue.

I'm glad you mentioned about the cat, as i was expecting the CAT to be as you said, a foot long jobby which is usually just before the backbox, like on the TF for example.

Going to have to wait now till i get access to a foot pump or compressor to test actuator and wastegate.

I'm going to have to put some pics up soon.

[Peter Gidden]

It looks to me like I am going to have to take the exhaust manifold off along with turbo and down pipe to sort this out properly.

1 out of 3 need removing. The other two absolutely no need.

[2mad]

The cars engine looks like it only need minor work to me , a couple of things need changing .. no big deal .. i would fit an aftermarket intercooler kit (nice cheap mod) gets rid of the aftermarker bov .. swop the stock bov for an aftermarket one like hks .. fix the decat downpe if its catching the wastegate .. bar no more niggly problems , jobs a good'n