Car starts with no problem . before warming up neon light between coils and spark plug indicates proper firing. When car warms up light is intermittent between good a and occasionally weak. The icm is potted and the mosfet must be failing because of heat . I am thinking i will put an aluminum heat sink under the icm for additional cooling . Has any one run into this problem ? new icm's are not available and used ones go for as much as $170 +shipping.