912 uls ignition
in General Tech Discussion
7 years ago
ALCON: I hope you can help me. In short, I have a 912 uls that used to run great, but not so much anymore. Functional problem is that the engine does not seem to fire on #3 cylinder at lower rpms. I was wondering why things were so rough and with significant vibration. Carbs are synced. Replaced spark plugs with similar results. EGT over 2500rpm is consistent with left bank of cylinders, so once up to significant RPM’s # 3 seems to be working and vibrations are attenuated. Once down to lower rpm’s it appears there is no spark on #3 as plugs are quite wet after low speed operation.. Does anyone have any good explanation? am I looking at an ignition module replacement? Please help.
