1999 Cadillac Escalade Maybe a problem with fuel delivery s

I have a 99escalade that had sugar poured in the gas tank when I was on deployment and I took the vehicle back to caddy dealer and have had over 2000 bucks worth of repair to ejectors and a month after returning home from deployment, I am still having problems. When I start up (the vehicle), it idles high and low and sometimes shuts down. When I take off(drive) right after startup it takes off slow and hesitates (kinda embarrasing around people)(women). A friend (backyard mechanic) told me that the spider assembly is finished and that no repair shop will fix these, they can only be replaced. Does this sound like a proper assesment? I do get codes for crankshaft position sensors, but I have replaced it. I was told that my fuel pump was bad, so I replaced it twice, once b4 the dealer repair and once after. I clear codes everytime I start up, but once It warms up it rides good. When I am at a red light, the truck wants to surge forward forcefully, so often I have to put it in nuetral until the light changes.