I found the problem finally. My aircraft and Aircam with two 912 ULs engines on it would run extremely rough at low RPM. I could not run the electric fuel pump because the engine with stall at low RPM as well as high rpm. Also the fuel flow was a gallon higher on the left engine than the right. It turned out that the fuel primer solenoid was stuck open. Therefore allowing raw fuel to go into the base of the carburetor at the manifold and flooding the engine. I have since blocked off the fuel going to the primer and the engines run extremely well and smooth. I will put two new primer solenoids on it soon and hope that fixes the problem.
Ron, glad you got it figured out. Sounds like a fluke and I've never heard of that issue before. Good job troubleshooting the problem. I always thought the Aircam was very cool. You can't get much better visibility than that.
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