I have a RAM 750F air start that I bought new about 10 years ago - runs great - never one second of trouble. I try to keep it in the rotation of flying my other jets.

The last few times I've flown it though, I can't seem to get the engine to hold idle. After startup it always seems to idle high - around 150mb. I then use the ign button
to lower the CP to 91mb. However after the flight at landing time the engine is back to a high idle.

The bearings seem fine and the temps are always consistent. This thing has just been a jewel since day one.

Have any old RAM owners ever experienced this problem?

Thanks