So I had to take my 96 Yukon to a garage to get it finished. Working nites, no garage, mud for a floor, not fun. But I put in a motor n tranny, got it running and it runs super smooth. I had other stuff to do to it, so didn't get driven around, but I would start it and let it idle, checking fluids, etc. I had to fix a brake line, while the hood was open I would occasionally rev it up. It has a whipple supercharger on it, so would rev pretty quick. I would try to rev it, it would stumble, sometimes it would rev sometimes it wouldn't. It would idle fine tho. Tried to start it next day and didn't start. I thought it was the pump, but garage says it has 55-65 or somewhere in there, can't remember exactly what he said. It would start on ether tho. Mechanic said it has fuel and spark, but the injectors aren't firing. He was gonna check some wires, there was one that looked like had corrosion on it, that was for the fuel return line for the whipple. So it really shouldn't have anything to do with the injectors, just pressure. This ran beautiful, then this. Really want to get this thing going, Im at a loss, and mechanic is too. There is no check engine light or codes, Im pretty sure he checked fuses. Im' really hoping its not the electronic BS for the whipple, since there is next to 0 support for this system anymore.