Hi, I have an RV7a with 2 light speed units that provide power to the engine this system was working well enough for some time and then all of a sudden I am having problems with the engine missing and fouling spark plugs. The last engine run up the right hand unit was to me not working correctly and it was breaking down to the point that the engine was back firing and missing quite badly. I did various tests such as coils, spark plugs all wires the pick ups and I believe that I have narrowed it down to the control box. One of the boxes is one of the original units and the one that i believe has failed is a unit that is only a few years old and has only done about 200 hours of work. The unit does work usually whilst cold and as soon as the unit has been working for some time around the time that the run up would be done the unit seems to break down at that point. Can anyone give advice that could help me to fix this frustrating problem, thank you ![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)