Review on Standard Motor Products AC239T Control by Richard Nelso

This control not only failed to boost the performance of my automotive fuel system, it actually ended up causing more problems than it solved. When I tried this product, I expected great things, given its reputation among other car enthusiasts, but was ultimately let down. While it did provide some marginal gains at the start, these quickly fizzled out and were replaced with stuttering and reduced power. In the end, I had to scrap it entirely and start over with a completely new system which was a considerable investment.