On my 2005 600 EFI there is a jumper wire that they call the fuel designation connector in the manual located off the front of the ECU. When running oxygenated fuel, which the manual defines as 10% ethanol or 15% MTBE the fuel designation connector should be disconnected. There is a picture of the jumper wire on the top of the ecu on on my sled.
You'll have that wire on your ZR Wayno ... it's been around for quite a while actually (I had it on my 2000 ZR & I know they continued using that design well beyond 2002). Look up by your tool box enclosure and you'll find the wires, as well as the diagram stating when to plug/unplug the wires. Unplugged is the way to go if all you have around you is E10 gas.