hi,

i have been having some problems with octavia 2004 1.8T, i had some missing and got the injectors and throttle body cleaned a few days ago..now suddenly the car is misbehaving again, its erratic on idling, some jerks while on rough bumpy road, also the car is powerless for a bit and the engine management light comes on ,also yesterday the car started missing lost all power and stalled, i restarted it and it seemed ok again..but the idling is still erratic it jums 200-300 revs up and down..the car is custom code remapped, remus free flow,k&n typhoon intake..my mechs are not sure whats the problem..

If the light is on there will be stored codes, what are they? Check the vacuum pipes by the dip stick tube for leaks.