I had mine out for about 3 months and running the same tank of gas scared me a little... could be fuel? Is it full? And did you replace the fuel filter? 3 months would be enough time for sediment to get really settled, Check your fuel pressure, maybe something is plugging the lines.
Also, is there an alarm system connected? Mine is supposed to not allow the car to start if it is triggered until disengaged with the remote. Not likely, but I thought I'd ask.
355 awhp fp green six speed wagon in Corvette Atomic Orange