There have been many, many cases where a non resistor plug left a plane completely unflyable and where replacing with a resistor plug fixed 100% of the problems. You should listen to some of the advice provided in this thread instead of being a cynic. Some of the people advising you have been flying gas for a long time and already experienced and learned from the problems you're having now. They have the knowledge you do not yet have.

Combine plug type with equipment types, condition, and installation methods and close to 95% of all "ignition" related issues are cured.