I have a 1996 Mazda Protege. Left for 3 weeks, came back and car is sputtering. Was very cold while sitting, below 0 at times. Ethenol in gas doesn't seem to be helping. Could there be condensation elsewhere? Car was just fine before trip. thanks
DUDE! You can't run ethanol in old cars! The fuel lines are made out of plastic, and, as you have just experienced, crack when exposed to ethanol.
There are a whole myriad of other problems that ethanol causes. My suggestion would be to replace the fuel lines and injector(s)
Even if you are lucky, and Mazda used fuel lines and injectors that aren't damaged by the ethanol, the cars aren't equipped to handle air-fuel mixture and the changes that the ethanol causes to it.
Firstly, Try draining your ethanolated gas, and replace it with regular gasoline.
I know there will be people telling you that older cars CAN handle ethanol, but you need to remember that Mazda engineers were not designing the cars to handle it, so it might run in the short term, but I wouldn't chance it.