Hello, once again my S40, 1.8 116hp 1996, with an interesting noise: when taking gas and also in the stationary gas one hears an even fluttering noise, which sounds like this: https://soundcorset.com/r/7r2v6CkUcc Apart from a very low stand-up gas (about 500 revolutions about 550-600) nothing else strikes me. Power is normal, gas acceptance and consumption too. Can one say from the noise whether this comes rather from engine range (sucking in?) or exhaust system? Exhaust system from Kat (including Kat) was renewed 3 months ago, but since then have had isolated ignition oscillations due to defective ignition cables (really very isolated, I think/hope they did nothing to the cat :P). Thanks in advance ^^