can't take this anymore please help

[ibizacupra]

you presume the turbo's ok..............

its asking a lot of it what you are saying.

actuator holding wg closed is most likely whats going on.. weak.

 

[chriscupra02]

I just want it to hold boost like it did iv spent a fair bit of money and boost acts like a k03. My car made good figures then quickly lost boost then started smoking and melted my valve stem seals which were fine 500miles before and turbo. Now I have a different turbo still does the same it keeps going through my head that there is a problem somewhere I'm not driving the car because I'm expecting to start smoking again as it destroys something else. I have tried adjusting wasgate to see if it hold boost better but no joy. Just want to enjoy the car and not worry there's a problem. Thanks for advice so far

 

[fourtwofive]

Jesus melted your valve seals. Sounds nasty. Did you get that all sorted? Who mapped the car Chris?

 

[chriscupra02]

Yeh it is now I got a new head with supertect valve's spring and retainers. So I'm worried that if there is a problem its going to destroy that head to. I just have a feeling that the turbo is haveing to work so hard that its overheating and melting things. Jabba mapped the car and they don't want to no or give any sugestions on what it could be they just are saying that it should hold boost better.

 

[fourtwofive]

Have you done any vagcom logs check what cf,s it's running do a cf and g/s log on it see what the outcome is. Could be running crazy hot Also what Intercooler you running. Just getting the whole picture. Boost drop can relate to a number of factors

 

[chriscupra02]

I have a massive toyo fmic. I posted the results from vagcom the other day but didn't do cf's will do with alex on tuesday. Its like when it peaks at 22 the car thinks there is something wrong and seems to dump 4psi instantly you can feel it then slowly drops to 15.

 

[fourtwofive]

Alex is a top guy hope he finds the cause and it's nothing major

 

[ibizacupra]

you need to log with wideband to see if everythings running ok.. not too lean (your mention of melting things previously is concerning if on same map) chances are the map in the car is an early S3/TT map anyhows.

 

[chriscupra02]

Will alex be able to tell me if its running lean. I'm unsure on how jabba mapped it like I said things started going downhill 2 weeks after they mapped it iv called them about 5 time for advice and they couldn't realy help at all. It had a new lcr pump on it for mapping so that should be fine. Iv been reading on this fourm and found something similar on an lcr that you commented on bill it was running lean so the trottle body slightly closed as a safety device could this be happening on mine.

 

[ibizacupra]

without seeing it, logging it on dyno under load I cannot say

dyno logging and wideband and looking at the map etc is what I would be doing if the car was here.

see what alex finds first.. your more local to him
if you get stuck, you are welcome to come here

 

[chriscupra02]

Ok cheers for your help guys let hope its something simple have a feeling it won't be tho. Will update tomorrow

 

[chriscupra02]

Well everything seemed ok on vagcom. We set the mbc to 1.45 bar vagcom reading and my gauge was saying 1.8 so put a new gauge on and changed the spring in the mbc to the harder 1. With it on its lowest setting it peaks at 1.55 bar on my new gauge and drops to 20psi near the redline still drops 4psi straight after it peaks tho and sometimes drops to 15 at redline fueling was ok and temps where great we think now the problem is an week actuator and it didd have a tt file on it. Thoughts guys should I get a forge actuator or am I asking to much hahah

 

[fourtwofive]

My ko3 hybrid acted much the same as your ko4. small turbo asking a lot. For me I got the best out of the car by running lower boost say 22psi. I was making the same g/s at high boost as I was lower. But at low boost 1.3 bar the car just felt solid. high spike was causing heat and more boost drop. If that makes sense.
Maybe worth a go on your setup. Actuator could be your issue but £70 to find out!

It's very easy to get caught up in numbers just try to set it up so it feels good on the road. Good that fueling ok

 

[chriscupra02]

Yeh I now what you saying its just the problem of this instant 4psi drop if I set it to 22 it peaks then drops instantly to 17/18psi then tails off higher up the revs. But now it peaks at 25psi then drops to 22/23 instantly where it should be sitting because that's what it was mapped at 22 psi. Set like this the car feels good like it used to and the forge actuator is 135 for the k04 thats more than half of a new secondhand turbo lol might just kill this turbo and start again with a new 1 haha

 

[ibizacupra]

and it didd have a tt file on it.

you sure about that? dont judge it by what its reported as being in vagcom...

read the file

 

[chriscupra02]

you sure about that? dont judge it by what its reported as being in vagcom...

read the file

Oh ok vagcom just poped up a tt file didn't read it tho I don't think. Bill why do you think my car losses this 4psi straight away no matter what peak you set it at. On my last turbo and this 1 iv had creap in boost with the n75 unpluged it would peak at 5psi then creap to around 9/10 psi higher in the revs is that normal.