Yes Moin I try to keep as short as possible. I have a B5244S 140hp engine from the V702 petrol engine.The car is the V70 1 This one has unexplainable ignition oscillators on the 4th cylinder.BETONE, ONLY the 4th.The ignition sparks also look weaker than the others when you hold the coil against mass.It was made: -A Volvo specialist workshop has changed 3 control units, -cable tree measured, no findings. -Volvo wanted to try a 4th again. -We have all injection, Zü From the idle control to the flushing strip Etc… -cylinder head overhauled, VSD, planned etc. Compression 11Bar on all. Is almost too little overtaking of the head. Still expose this sporadic, no matter how you move the plug/cable. Speed at 800, but it still runs shit. I also installed another adjustable NW wheel in the course of it, now it could also be because it was always due to the adjustment and I also changed it with H In the morning, I will do it again and get a guide from Volvo. Can the adjustable camshaft be responsible for “sporadic” detonators? There may have been something like this before and someone has another tip. With Nordic greetings, Eric Rönick I posted the same thing in the forum at S60 etc. Because the engine also happens.