Hey, Paul
I wasn't getting run-on or dieseling with my truck, but I DID notice a hesitation when I turned the engine off. Then, after rewiring my engine area and installing the diode, I noticed a BIG difference -- now, when I turn the engine off it feels so good!
It turns OFF!
I don't like Rochesters any more than Holleys ... they're both argumentative, to me. The Edelbrock is a real honey!