S2D
MEMBER
Montana
Interesting project. wonder if anyone has run across this problem.
Aircraft: Cessna Agtruck IO520D fuel injected engine
Last year, at end of season engine would die when rpm was under 1500 without boost pump on
Cleaned Dist valve- no fix. Replaced engine fuel pump. Seemed to fix problem.
This year boost pump went out middle of season
replaced with serviceable unit.
immediately afterward engine wouldnt run below 1000 rpm without boost pump on..
Now suddenly engine is back to last years scenerio of not running on ground without boost pump on.
Engine runs fine in the air until turning at end of the field and then boost is needed. Further testing shows fuel pressure is directly associated to the number of G's being pulled. pull back on the stick and the fuel pressure continues to drop, push forward and the pressure continues to climb.
Trying to figure out what would cause this. before I start replacing parts
Aircraft: Cessna Agtruck IO520D fuel injected engine
Last year, at end of season engine would die when rpm was under 1500 without boost pump on
Cleaned Dist valve- no fix. Replaced engine fuel pump. Seemed to fix problem.
This year boost pump went out middle of season
replaced with serviceable unit.
immediately afterward engine wouldnt run below 1000 rpm without boost pump on..
Now suddenly engine is back to last years scenerio of not running on ground without boost pump on.
Engine runs fine in the air until turning at end of the field and then boost is needed. Further testing shows fuel pressure is directly associated to the number of G's being pulled. pull back on the stick and the fuel pressure continues to drop, push forward and the pressure continues to climb.
Trying to figure out what would cause this. before I start replacing parts