Have 85 Z28 with 350 tpi. I have wiring problems with fuel. I took it down to a local guy said he could do it. Well, this guy is pissed off and doesn't want to continue. He keeps buring up ECM's. The first problem was the fuel injector not ingageing right. Then not the right fuel pressure. He has localized to fuel relay back to fuel pump. Some where there's something F&^*ed up. My questions are what all does the fuel relay control. I know of the priming and the cold start. Anything else? He wants to run a hot from the fuel pump to the key switch or a toggle will this all work properly? And for how long? I hope you can help.