I've done the evap, sai, N112 & N249 delete last weekend, ever since then when slowing down or coming to a halt,the revs drop below 500 rpm and it stalls.Engine management lights on and the asr light is on.I followed the step by step guide on here that bowders did and the one rob has done on pimpmyskoda.co.uk, used the same resistors done every thing the same. I tried putting the N112 & N249 and the evap cap back on without the pipe work and it was fine for a few days now it's gone back to stalling.i've scanned the car with vcds lite and it's bringing up sai incorrect flow and evap not going to tank or something like that.starting to lose patience now.Can someone point me in the right direction PLEASE. Thanks in advance.

I may be wrong, but it sounds like the resistors may not have worked. I don't think they're guaranteed to work. Sure someone will have more detail for you, I never got round to doing this myself, but if they're the faults you're getting it sounds like the ecu is still expecting a signal and isn't getting any.

The sai pump wont cause that issue as its only on for 2 minutes on start up, sounds to me your loosing vacuum causing the issue, check all vac hoses are good and solid. Also with the engine running pump your brake pedal then push and hold down hard, if the idle changes with your movements its a vac leak, unfortunately I have no idea were these pipes are on these cars but hopefully this helps, good luck

if you have access to VCDS/VAGCOM get a block 32 reading as that can confirm a vac leak as well

Thanks for the replays guys,would using vcds lite be able to confirm a vac leak.

I cant remember if it will go up to block 32 but there are lots of members on the VCDS map with full versions that can help (sometimes for beer )