Suddenly irregular idle

Hello, I need help. My moose doesn’t want to go back once again. It’s a normal motor. Started after a few hours and then irregular idle. The cables, candles, fingers and cap are only 10000 km inside. Does everything look okay. No creeping sparks or burns to see. The motor run does not change when I pull off the individual cables one after the other.Good I will clean the air mass meter again. But everything so without warning? an idea.? Zahriemen was made the other day. But the 2500km to Sweden he survived without any hesitation. Would be grateful for any tip. : ( My car is a v70 I Bj 99 automatic, gasoline.