Hello Net
An occasional miss can be real confusing, especially when you are using a
single ignition system. If you are really concerned you could eliminate
ignition as the cause by installing a dual ignition system. What is the
chance that both systems could have a miss at the same time. My old 1915
had an occasional miss. On my new 2366 I installed dual ignition and have
only had one miss, and I feel it was mixture related due to turning off my
boost pump at full power. I have come to the conclusion that their might be
other problems that could cause the random miss. One possibility is a
sticking valve. This could happen when the engine is really heat soaked
from extended taxi time and a lot of pattern work where the engine is not
allowed to cool between full power operations. Another possibility is for
momentary fuel vapor lock. Again a heat soaked engine compartment on a hot
day could be enough to boil the fuel. I have practiced limiting full power
operations on warm days. I do pattern work early in the morning when the
temp is cool. On hot days I only use enough power to get off the ground and
power back as soon as I can to allow the engine to stay cool.
Catching or finding the cause of a random miss is not easy.
Orma
Southfield, MI
N110LR Tweety, old enough to drink this year
Flying and more flying, to the gathering or bust
http://www.kr-2.aviation-mechanics.com/
