Check Engine says: System Running to Lean.....what could it be??

 

I had the same problem. i had a code for engine running too lean but there was no misifres or rough running. it was the Mass Air Sensor. I replaced it first after checking all the vacuum lines and it has not come back.

 

Most common problem is a vac leak. The line that goes from the front part of the intake mani to the diverter valve, and the line that goes from the fuel pressure regulator to the intake mani often become brittle and break.

 

OK I have this same problem... What are these vacum lines called and where can you get replacements i know mine leaks just cant find anyone with them

 

Most refer to them as vacuum hoses... most auto part stores have reels of them and you can cut as much as you want. Otherwise heres this: http://www.ecstuning.com/Search/Vacuum_Line/ES1928259/

 

+1 good stuff from ecstuning. I've fouond that the hose you get at parts stores isn't as "thick" as the ecs line...