changed plugs keep fouling

since i put the bad gas in ive changed fuel filter ,drained tank and blew out the line from front to back .i changed the plugs and now they are fouled .i wonder if that happened from it not starting withe bad fuel?.also since i blew air threw the fuel line would it maybe have air in the line ? do i have to bleed it like a brake line?

What year, engine size and mileage?

If you have the 3.4L the rear fuel rail has a Schrader valve that you can push in on and see if fuel comes out or any trapped air.

Are you getting a SES light?

yes i have a ses light started with the bad gas.i have pushed the valve and i get a little squirt of fuel but i was wondering if it was possible to have air to which it would not allow enough fuel to injecters?

yes i have a ses light started with the bad gas.i have pushed the valve and i get a little squirt of fuel but i was wondering if it was possible to have air to which it would not allow enough fuel to injecters?

Its possible. You'll need to hookup an automotive fuel pressure gauge to the valve. The pressure gauge will have a purge button and runoff hose where you can purge any possible air out. You can do this while engine is running or in the fuel pump prime position. The gauge runs around $25 at places like Autozone. You could have a clogged injector. Have you tried any fuel injector cleaner additive like Lucas?

Also you can check fuel pressure to see if it is in specs.

For the SES light I'd get it scanned for odb-ii error codes.