Ignition Check Irregularity

Hi Jeff,

I agree with Sherlock. 😁

Thank you, Roger Lee!  With the new module and 100 hour module installed, I clipped 8 plug wires and applied dielectric grease as you directed.  The runup was OK, but near the edge of the acceptable numbers.  Flew the plane 20 minutes and checked runup after clearing the runway.  Outstanding!  Smooth and very little drop.  I guess there was some corrosion on those wires where the plugs connect?  I put the 1,000 hour module in my field tool kit for use if a module expires somewhere and I need to get home.  I especially appreciated the comment on modules not being likely to exhibit large RPM drops inasmuch as they are either alive or dead.  This will be helpful in my future trouble-shooting. I think I am going to include plug wire cap removal and dielectric grease application to my annual condition inspection as a preventative measure.  Again, thanks for the timely and expert advice.    Jim

Roger, I am curious about your comment about using white thermal paste and NOT the white dielectric grease. I thought they were basically one and the same?

Hi James, 

Glad it worked out.

To be honest this may be just in the wording. I was always taught it was a siliconed base and it's thermal conducting. I don't  think dielectric grease has the same thermal conducting properties, but maybe I'm wrong. I'll  research it.