bjohnson1234
Well Known Member
This morning after a normal run-up my engine quit on takeoff rollout with full throttle and mixture on my Superior XP-360. A few weeks ago I did some maintenance including repairing my air box (the filter had worn through the fiberglass) and installing the "poor man's cold air induction" from Flyboyz (http://www.flyboyaccessories.com/Poor-Man-s-Cold-Air-Induction-System-p/2107.htm). When I took the air box off I cleaned some of the build-up off the inside of the fuel injection servo with some carb cleaner. All gaskets on the induction were scraped clean and replaced with new ones. I did a test flight a week ago and didn't notice any issues during a few laps in the pattern.
On the ground after the failure I noticed a few things:
1. Briefly going to full throttle and then idle caused the engine to quit
2. Fuel pressure would sometimes drop to between 8 and 10 PSI. The boost pump restored pressure to 24-25 and it would stay around 22 when I turned it off, but it would sometimes drop back down when increasing the throttle
3. Engine would sometimes stumble when changing throttle settings. Boost pump made no difference even when non-boost pressure was low
4. Idle was smooth
5. Engine ran smooth at constant throttle, high or low
After double-checking the intake and looking for any other obvious issues, I did a high-speed taxi which ended up turning into a takeoff. The engine ran smooth for a while, but at one point felt like it was losing power on the climb. Anyone have any ideas of what the problem might be? Anyone around DVT that could help me out with it? Thanks.
On the ground after the failure I noticed a few things:
1. Briefly going to full throttle and then idle caused the engine to quit
2. Fuel pressure would sometimes drop to between 8 and 10 PSI. The boost pump restored pressure to 24-25 and it would stay around 22 when I turned it off, but it would sometimes drop back down when increasing the throttle
3. Engine would sometimes stumble when changing throttle settings. Boost pump made no difference even when non-boost pressure was low
4. Idle was smooth
5. Engine ran smooth at constant throttle, high or low
After double-checking the intake and looking for any other obvious issues, I did a high-speed taxi which ended up turning into a takeoff. The engine ran smooth for a while, but at one point felt like it was losing power on the climb. Anyone have any ideas of what the problem might be? Anyone around DVT that could help me out with it? Thanks.