Iv got alot less power on boost than I did last week so I'm assuming iv a boost leak. Saying that I have no clue about the turbo side of engines as this is my first. Iv had it for about a month and like I said there's less power on boost. There's no eml on. Any ideas were to start looking.

Thanks Ross

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What sort of sounds are you hearing first of all. Any whistling? Have you fault code read it?

Iv put a k&n on the car straight on the maf. When the car starts to boost you can hear a thhhhhhhhhhhhhh sound until you let off the throttle and you get the tsh from the recerc valve. When the engine is really cold just after start up its stutters slightly under load but after 40 secs it goes and if I let the car idle for a min it doesn't do it. But the car has to be stone cold for it to happen. Even if the outside temp is above 9ish degese c then it don't happen don't know if this is relatted or not.

Ross

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And no fault code read yet I'll have a look tomorrow iv only got vcds lite so what tabs should I look under?

Ross

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Iv put a k&n on the car straight on the maf.

That's not helping, it will just be sucking hot air in from the engine bay. You either need it on a pipe so the k&n filter is down in the cold air in the bumper or bin the k&n and stick with the normal airbox and panel filter.

The cold start thing you mentioned is normal, they all do this when they're cold to warm the exhaust and cat up. Just wait for a minute before driving off.

Did you unplug or disturb anything when you fitted the k&n?

To do a fault code scan on VCDS press autoscan on the main menu.

Don't think you can do an auto scan on the lite version. I do have a cold air feed to the k&n 2" pipping from the bumper to the filter. And I put a mini filter on the other pipe that comes off the airbox ( what is that btw?)

Ross

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Edited 12 January, 201214 yr by Ross SY

Little pipe is the secondary air intake (noisy start up) and that's still no better the k and n needs to be in the number attached to a Cai.

As stated above K&N on the MAF pipe is a real performance killer even with a cold feed. You also increase the chances of oiling up the MAF quickly.

The other pipe you mentioned is part of the secondary air intake that is only active on cold start for 60 secs or so.

You can do an autoscan with VCDS lite if it's registered with Ross Tech , but you can't clear any codes that it finds, you'd have to go to the individual modules to clear them.

Edited 13 January, 201214 yr by pauldazzle

Ok has any1 got a spare cai cheap plz or a link to a cheap 1 don't need the filter. Can't seem to find cheap ones online.

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Usually loads of cheap CAI's on fleabay.

http://www.ebay.co.uk/itm/COLD-AIR-INDUCTION-INTAKE-SKODA-OCTAVIA-1-8T-1998-2004-/350473916943?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item5199df920f

All you need is the pipe, the rubber joiner and the hoseclips if you've got a decent K&N cone filter already.

edit: I just PMSL at the claim on there about it adding 10-15bhp and 10ft/lb torque...

edit: I just PMSL at the claim on there about it adding 10-15bhp and 10ft/lb torque...

LMAO.