Yeah Cornells are really good at what they do thats for sure. For what its worth. The chip is really only good when towing and under load. My ol' 3ltr had a DP chip and it made zero difference without the chip with no load. But when towing the camper that when it made the difference. But that was a DP Chip. Can't say for other brands. Maybe your chip was just faulty too??? Who knows?