During Christmas break my truck started acting up. I thought it was water in the gas so I went to autozone to run the engine code reader and it said 3 cylinders miss fired and o2 sensor 1 is stuck. So I put in new spark plugs, fuel filter and an o2 sensor. The cylinders still miss fire. So I bought a new spark plug coil becuase the other one got cracked. I still had the problem of the cylinders miss fire. So I decided to go to autozone and get the computer to read and it said fuel system to lean bank 1. So we figured out it was the MAF sensor so we cleaned it. My truck started running back to normal so I reseted the computer after the truck got fixed. A day latter the check engine light comes on and it says fuel system to lean bank 1. Im trying to figure out what the problem is and im getting bad gas millage when im driving my truck easy.

 

sounds like the problem i hade when my maf died i would go pick up a new maf and give it a try if its not the problem pull it back off wait a day return it and get your money back also what did you use to clean it with did you use maf cleaner,electronic parts cleaner,carb cleaner or what?

 

i used electronic parts cleaner i think

 

like i said i would just pick up a new one and try it out i know a maf is a electronic part but they have a special cleaner for them and they are really delicate parts

 

only 10% of the MAF sensors fail though.

 

??????? did you break it or something dont tell me it fell apart and got sucked up in the motor

 

no only 10% of the MAF sensors break not fall

 

sounds like your cylinder #1 fuel injector is seriously fouled
( it is not spraying the proper amount of fuel that is needed )

i would try having your fuel injection power flushed 1st

 

How do you flush a Fuel Injector?

 

there is a screw nozzle attached to your engine`s fuel rail
they pull the fuel pump fuse, they run the engine until it stalls
then they hook up a injector power flushing machine that pulsates a cleaning solution through the injectors
( while the engine is running )