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Hmm unsure but dont think so. Revo doesnt state it needs that? Im gonna send him back down to the "tuner" as im not clued up on the 20vt and dont have vagcom either. Thanks for help, i'll post the outcome hopefully help someone in future,

Just went straight to stage 2. Hardware requirements: high flow decat, exhaust system, front mount and cold air induction- has all that on it..

Thanks for replies. Okay im going to suggest he has a word with them and if required he can quote the statement on Revo website about checking cars health before mapping. Even if its a case of removing map and getting his money back at least until this problem is fixed. Only problem is, if...

Only bypassed it temporarily to see if boost increased but it didnt so its now re-connected. Resistor just to stop EML?

Yeh looked into that, its an ecu controlled vacuum to open the DV, although im not entirely sure what could give the fault code. Id guess its when it feeds the N249 to bleed off some boost but then sees no boost drop ? Checked vacuum side of DV thats okay.

Thats more like the spirit! ;) Interesting the quote youve put up, never thought about it that way. I think we just assumed it was a simple enough job for them. once it was mapped and told it needed a boost issue fixed before it would run stage 2 boost, we were more inclined to find the fault...

Burn my bridges? Okay.. As you can read above ive been very thankful to those who are helping. PLEASE DO NOT FILL THIS FULL OF POINTLESS POSTS !!

Again Tuffty, thanks for your extensive input. Just shows the opposite ends of the scale in here. How to be helpful and make friends like forums are designed, and then how to be disliked and ruin them. Anyway, im now fully understanding the N75, again thanks to you. So the fact its at 100%...

Why not save your breathe if youve nothing helpful to add. If the forum was full of people like you it wouldnt exist. Some of us like to understand and fix our own cars, and dont have limitless funds to hand it into a garage to fix. They were paid to install a map, which theyve done. Your...

I dont understand the working of the N75, i assumed it would simply get a signal from ECU at a set boost pressure to open the wastegate to stop spooling? Its not my car but im sure it was Stage 2 a while ago as it had everything on it to be stage 2, but had cat pipe replaced for standard and...

What do you mean doing 100% N75? I assume the readings are it opening and closing the N75 which in turn opens actuator/ wastegate? Is the actions on it normal?

Also, cleared codes before run, now it has the N249 mechanical malfunction code back!

Ok i have to apologise, we just went out for a run in it and it is requesting 1.5bar after all, actual boost of not even 0.8bar. Also shows wastegate duty cycle, i assume thats the N75 requests? DV diaphragm is okay, whats easiest way to check if spring in it is soft and allowing it to leak...

No i now agree its not in limp state. Request from memory was maybe an absolute maximum of 2100mbar and dropping to 1800mbar after boost spike. It was always near enough matching the requested boost, as youd expect. I only have use of Snap On which shows live data.

So the fact its running 0.8 (standard) not 0.5 (limp) or 1.5 (stage 2) looks like its the map at fault? It was mapped, charged for the map and told it isnt running any quicker or the right power due to another fault. Ran a scan and the N249 was noted. They dont have a 4wd dyno so couldnt run...

Can it not just be requesting low boost as its in some kind of safe mode? Dont want to go back to tuner blaming them unless i know for sure it should be requesting full boost. So it should be requesting around 2500mbar if the map is on and okay? What are other options, DV or N75? Since...

But it has been crap from the minute they loaded the map? Or thought they loaded the map... He put it in for map, they said they mapped it and it wasnt any quicker so ran fault scan and the n249 mech failure came up. He also said it was only running 0.8bar instead of 1.5bar. I bypassed n249...

The plastic diverter valve? Oem black thing on right hand side of head? I'll check the DV, is it obvious when there knackered? Where do i find N75 valve? Ive just re-read Tufftys advice- we checked actual boost against requested boost and it was very slightly less but nowhere near asking for...

Tuffty thanks for taking time to go into depth. You are right its an N249 mechanical failure code. This was diagnosed by the tuner who applied the map. So would you suggest checking dump valve first due to this code? Its a 2000 S3 210bhp version.

Cheers, i'll do that then. I assume they are fun to change due to location? Best one to get? How do i go about setting it to run 1.5bar?