[homemade87]

My guess would be the injectors are clogged being there was nothing wrong when parked . Ls injectors are subject to this . I here it a lot from the swap people who leave there motor in the corner for a while before they install it . Ethanol fuel plays havoc on fuel systems .

If you can get the fuel out of the tank I would . If you can not get the fuel out add some star tron fuel conditioner and add some 93 fuel ( old gas looses it octane ) . Also if you can here the fuel pump running for a few seconds when keyed on you are good .

Next I would remove the injectors and clean them . There is several home made injector cleaner devices on u tube . I made one my self to clean injectors on engines that have sit for a while . Also this problem will not set any codes .