Hi all,
After several busy weeks I was finally able to fly last week and run a GAMI spread to diagnose the overheating issue of cylinder 1 on takeoff/climb. Not a massive overheating mind you (~390-400 deg) but still much higher than normal. Below are the screenshots from May this year (poor data rate but it gets the point across) and the one I took last week. You can see that the May spread was very good (about 0.2 gph). The one from last week however shows the cylinder 1 peak occurring roughly 1 gph higher than the rest of the cylinders; the other cylinders all look the same as before. To me this indicates a partial fuel blockage in either the injector itself or the feed line/distributor. I removed the injector before the flight (since I suspected this might be the issue) and everything looked clean and free. Reinstalled and flew the plane. Do y'all agree with my diagnosis? What other parts are susceptible to plugging? Since it's only this cylinder and total flow rates are normal on takeoff and cruise, I'd think it would be something downstream of (or in) the fuel distributor/spider. Should I send the injector back to GAMI to get it flow tested first before I do anything else?
-Don