shots from the garage...
Same box my son had issues with. It worked great for years then all the sudden it wouldn’t make the one, two shift on his 727. I called the company to see if it could be tested and he said yes but then went on to say they never had one go bad. He said interference in the system or a bad ground has always been the issue. We cleaned Matt’s grounds and it would still do it every so often. When we pulled his engine we found his distributor had gotten rusty under the cap from leaving it in the trailer at the track. Take a good look around.