Good evening,
Hoping someone can assist. I have a 1974 Piper Warrior, Lycoming O-320 that was upgraded to the Ram Air 160HP.
At random (cruise, climb, descent) the engine will reduce by about 50-75RPMs. The sound is similar to when you lean one click too far.
Sometimes it happens in conjunction with a power change. Sometimes it happens on it's own.
I've noticed the fuel pressure gauge at the lowest end of the green arc when this happens, other times the pressure has been in the normal range.
At first we thought it was a lone spark plug misfiring. That wasn't it. Then we checked and replaced the magnetos. That wasn't it. Changed/adjusted the mag timing, that wasn't it.
It could be the carb, or something to do with the fuel system.
Post oil change, my mechanic performed a run up and noticed the fuel pressure stayed at the redline leading him to believe the engine driven fuel pump is shot, so we are replacing that next.
Has anyone else experienced this problem?
Also, let's say this wasn't caught and the fuel pump failed in flight. Would the electric boost pump be enough to save you? It doesn't specify in the POH, it only says to use the boost pump during takeoffs, landings and maneuvers. Does anyone know for sure? Thank you in advance!
Hoping someone can assist. I have a 1974 Piper Warrior, Lycoming O-320 that was upgraded to the Ram Air 160HP.
At random (cruise, climb, descent) the engine will reduce by about 50-75RPMs. The sound is similar to when you lean one click too far.
Sometimes it happens in conjunction with a power change. Sometimes it happens on it's own.
I've noticed the fuel pressure gauge at the lowest end of the green arc when this happens, other times the pressure has been in the normal range.
At first we thought it was a lone spark plug misfiring. That wasn't it. Then we checked and replaced the magnetos. That wasn't it. Changed/adjusted the mag timing, that wasn't it.
It could be the carb, or something to do with the fuel system.
Post oil change, my mechanic performed a run up and noticed the fuel pressure stayed at the redline leading him to believe the engine driven fuel pump is shot, so we are replacing that next.
Has anyone else experienced this problem?
Also, let's say this wasn't caught and the fuel pump failed in flight. Would the electric boost pump be enough to save you? It doesn't specify in the POH, it only says to use the boost pump during takeoffs, landings and maneuvers. Does anyone know for sure? Thank you in advance!
