Not sure if this is a sudden issue or not. I've had the truck seven years. Truck has a small miss/shake at idle but will happily idle all day. Drives fine. Plugs and wires done within the last two years. Cap and rotor this year. Both banks are showing very high LTFT while driving, usually around 15-18% but bank 1 shot up to 20% briefly while I glanced at the OBD2 reader on the highway. Going completely off throttle both banks shoot back down to about 6%. Haven't checked trims while idling, forgot. There is no CEL. I have used a bottle of Techron fuel cleaner once a year, the last two years. Unsure when MAF was changed, I never did it. Fuel pump is a Delphi and replaced a few years ago along with filter. Unsure of spider injector state or if it was ever replaced with newer style. Intake gaskets done about five years ago.
Thoughts on where to start troubleshooting, if anywhere? Or am I just worrying for nothing? Thanks.
Thoughts on where to start troubleshooting, if anywhere? Or am I just worrying for nothing? Thanks.