RUNS FOR ABOUT 8-10 MILES THEN JUST CUTS. WONT RESTART IMMEDIATLEY BUT LEAVE IT 10 MINUTES THEN IT FIRES UP AND THE SAME REPEATS EVERY 5-10 MILES. ANY CLUES WHAT I CAN CHECK,I WAS TOLD IT MMIGHT BE THE COIL OR DITRIBUTOR BUT HOW DO I TEST ONE OF THESE THINGS BEFORE I EXPENSE ANOTHER AND IT...