SuperCubDriver
Well Known Member
I had rough idle from the very beginning. Low power settings like 50 percent above 10000ft causes the engine to run rough. Only some higher than necessary fuel flow let the engine run acceptable, which is in fact not acceptable! I believe the fuel servo could be the problem and is not regulating correctly. Idle fuel flow is above 2 GPH, more like 3 GPH.
Right now while idling I got high EGT on Cyl. 4 and I can even hear some popping exhaust sound, probably from the lean cylinder.
I checked several times for intake leaks and the fuel line plumbing - no findings.
Now I intend to open and clean the fuel divider to get at least rid of this leaner cylinder. Of course I have the AFP manual but I thought I ask for your input and experience.
I know it would be best to send the whole thing back and have it checked but doing so from Germany is not what I like. The airplane is flyable, it?s just not perfect on very low power settings and idle.
It is a IO-375 with AFP 150 fuel injection, two Pmags. Total time 250 hours
Right now while idling I got high EGT on Cyl. 4 and I can even hear some popping exhaust sound, probably from the lean cylinder.
I checked several times for intake leaks and the fuel line plumbing - no findings.
Now I intend to open and clean the fuel divider to get at least rid of this leaner cylinder. Of course I have the AFP manual but I thought I ask for your input and experience.
I know it would be best to send the whole thing back and have it checked but doing so from Germany is not what I like. The airplane is flyable, it?s just not perfect on very low power settings and idle.
It is a IO-375 with AFP 150 fuel injection, two Pmags. Total time 250 hours