I AGREE WITH ADRIAN HERE THAT TUBE WEARS SO SLOWLY , WITH THE HOLE THING THAT I DOUBT SERIOUSLY THAT WOULD BE THE PROBLEM, FIRST DO YOU HAVE A FACTORY CAP AND ROTOR AND WIRES , CAP AND ROTOR I HAVE SEEN MANY OF THEM KEEP THE ENG FROM RUNNING CORRECTLY, ANY GOOD SET OF PLUG WIRES SHOULD BE OK, DO YOU KNOW THE ACTUAL COMP, READING, TAKE A READING WITH A WARM ENG, BE CAREFUL GETTING THE PLUG S OUT , NOT A HOT ENG , PROP THE THROTTLE VLV ALL THE WAY OPEN AND SPIN IT OVER 4-5 REVOLUTIONS AND LETS SEE HOW CLOSE THE NO,S ARE , YOU COULD JUST HAVE A BURNED VLV, ALLSO CORRECT VLV ADJUSTMENT .. JERRY