Roger72

@Routemaster1461 It's not the bonnet he is afraid of opening, just the oil filler cap with the engine running on idle. I have a lot of experience with engines in the past and removed the oil cap on mine, (on idle) just to check for excessive blowback. When the rings or valve seals are worn you get excessive blowback and the engine on my Karoq sounded like engines I had in the past with excessive blowback. Instead of blowback there is a vacuum and the engine is sucking vast amounts of air from the oil filler cap. I don't know if this is normal, I was used to the opposite. Anyway will try and take it to a garage tomorrow.

Hi, I recently acquired a Skoda Karoq 1,5 as a lease car. The car was a showroom model and had 14,000kms on the clock. Ever since I got the car I was not 100% convinced everything is in order. The car drives well but I feel it lacks power. The exhaust sounds as though it is partly obstructed and the engine sounds a little muffled as though exhaust is leaking into the valve chamber. I removed the oil cap filler to check for blowback or smoke but there was none, instead I noticed a strong vacuum in the oil chamber and the engine revved up a little when removing the oil cap. Is this normal? Could there be an ECV problem? A friend of mine has a Seat Ateca also with a 1,5 engine. His car sounds healthier and there is a quicker response on the gas pedal. He is reluctant to open the engine compartment remove the oil filler cap because the car is not his and is afraid of affecting his warranty. No engine warning lights Is it normal that there is a strong vacuum when removing the oil filler cap? I read online that when there is vacuum in the valve chamber it could be that the ECR valve is stuck but with just 20k on the clock I find this unlikely.