Kyle Boatright
Well Known Member
I'm finishing up my condition inspection and ran into an issue with the pMag. It was working fine before the inspection, so there's a good chance that the problem is/was related to the maintenance/inspection.
In any case, the symptoms are roughness and lumpy idle on the pMag below about 1300 rpm. That occurs with the pMag alone or the pMag+Mag. At 1300 RPM and below, the engine runs better on the mag alone than on both ignitions.
Above 1300 rpm, the engine runs fine.
These symptoms began a week or so ago when I awakened the engine after the condition inspection. As part of the inspection, I had pulled the pMag to check for shaft play and normal rotation. No problems were identified. To remove the pMag for the inspection, I disconnected the 6 pin connector that attaches to the pMag, and subsequently reconnected it. I've checked/tightened it since then, with no improvement.
In talking with Brad at Emagair, he had me troubleshoot the system by looking for problems in the power and grounding wires. No problems were identified. Tomorrow, I'm going to run a direct circuit from an independent battery to power the pMag to rule out (or in) a power/ground problem.
Any other suggestions?
In any case, the symptoms are roughness and lumpy idle on the pMag below about 1300 rpm. That occurs with the pMag alone or the pMag+Mag. At 1300 RPM and below, the engine runs better on the mag alone than on both ignitions.
Above 1300 rpm, the engine runs fine.
These symptoms began a week or so ago when I awakened the engine after the condition inspection. As part of the inspection, I had pulled the pMag to check for shaft play and normal rotation. No problems were identified. To remove the pMag for the inspection, I disconnected the 6 pin connector that attaches to the pMag, and subsequently reconnected it. I've checked/tightened it since then, with no improvement.
In talking with Brad at Emagair, he had me troubleshoot the system by looking for problems in the power and grounding wires. No problems were identified. Tomorrow, I'm going to run a direct circuit from an independent battery to power the pMag to rule out (or in) a power/ground problem.
Any other suggestions?