Hi all. I have an IO 360 (350 hrs) that started backfiring at idle when warm. I went through those threads. i saw a little fuel/oil on the inlet manifold of number 2 cylinder so took it for an engine run to see if i could see anything about that cylinder.
Once warm at idle it began back firing again. But after about 30 seconds the backfiring stopped and the EGT and CHT of number 4 cylinder dropped away and the backfire stopped. So at least i think i can isolate the backfiring to number 4 cylinder because it stopped when the cylinder stopped.
Any thoughts on the most likely problem? Blocked injector? Stuck valves?
Help appreciated.
Once warm at idle it began back firing again. But after about 30 seconds the backfiring stopped and the EGT and CHT of number 4 cylinder dropped away and the backfire stopped. So at least i think i can isolate the backfiring to number 4 cylinder because it stopped when the cylinder stopped.
Any thoughts on the most likely problem? Blocked injector? Stuck valves?
Help appreciated.