In general it die after leaving the pit stop, maybe after doing 20 to 30 feet.
Sometimes, when the engine not die, it bog for some laps, like the engine need to close half turn on hsn.
I'm having this problem a lot in the last races.
Engines are new, 3 or 4 months old.
One RBS5 in a buggy, and one RB928 in a truggy.
Thanks</p>