what is the best way and procedure to clean the injectors on an 01 2.2L? i've been getting pretty poor gas mileage with my truck for a while now and its killing me for it to be a 4 cylinder. i replaced the vacuum line that runs from the throttle to the t on the drivers side and also the shorter vacuum hose that goes from the other side of that t to the fender. i've got a quart bottle of lucas injector cleaner and a new set of ACDelco spark plugs that i bought today but i didn't know if i should run the cleaner through it first and then install the plugs or what :dunno: i just want to try and clean it out good and maybe improve my mileage some. any suggestions would be greatly appreciated.