It hasnt been on the road since the late 90's? You really should go through a list of things that could be wrong. Was the gas tank and fuel system flushed out before filling it with fresh gas, I'd also replace the filter. Having sat that long i wouldn't be surprised if the EHA is seized up. You make be able to make some adjustments to CO adjustment screw to back the fuel off. I'd also look around at all the rubber roads and and inspect the intake manifold gasket. maybe you have a large vacuum leak somewhere, get the car idling before it warms up and spray break clean all over the gasket and vacuum hoses, if the idles climbs-you've found your vac leak.