I think my car is running lean!?

Discussion in '96-04 - 2V Specific' started by AaRoN, Jun 27, 2007.

  1. AaRoN

    AaRoN King Post Whore

    Messages:
    33,966
    Likes Received:
    38
    Joined:
    Sep 12, 2006
    Location:
    Orlando, Florida, United States
    So it runs fine until it warms up. Then is starts to spit and sputter when i'm cruising at a steady speed but if im accelerating it's fine. I'm lost as to why it's doing this. I noticed it after i washed the engine bay. it's totally fine (warm or cold) when it's just idleing. my a/f (although it is just the autometer lightshow) it stays towards the lean side when i'm cruising. any ideas?
     
  2. quickstang_1994

    quickstang_1994 Well-Known Member

    Messages:
    2,208
    Likes Received:
    12
    Joined:
    Apr 30, 2006
    Location:
    Cross Anchor, SC
    pull your wires and blow the water out, then pull the plugs and clean them with carb cleaner
     
  3. AaRoN

    AaRoN King Post Whore

    Messages:
    33,966
    Likes Received:
    38
    Joined:
    Sep 12, 2006
    Location:
    Orlando, Florida, United States
    thanks man. i'll try that. it gets me that would be the problem only when the car is at operating temp :dunno:
     
  4. quickstang_1994

    quickstang_1994 Well-Known Member

    Messages:
    2,208
    Likes Received:
    12
    Joined:
    Apr 30, 2006
    Location:
    Cross Anchor, SC
    Before operating temp it runs off a set mode not the sensors. You might want to clean the maf while you are there. I wash my S281 and it did the samething and it took me a while to realize that water got pass the boots on the spark plugs.
     
  5. AaRoN

    AaRoN King Post Whore

    Messages:
    33,966
    Likes Received:
    38
    Joined:
    Sep 12, 2006
    Location:
    Orlando, Florida, United States
    i think thats what it is. i noticed some water around the boots a couple days after. thanks a bunch O0
     
  6. Whistler98

    Whistler98 Active Member

    Messages:
    894
    Likes Received:
    8
    Joined:
    Jul 25, 2006
    Location:
    Southwestern, Pa
    Yeah I bet you just got water passed the boots. You have to be careful when spraying off the motor. When I changed my intake I got coolant everwhere, starter up and it was fine then it started missing and stuff. Here I just didn't get all the water outta the spark plugs. blu them out with compressed air and had a nice green fog comin outta there, ran fine after that. I would just pull the boots and blow them out hopefully that will fix your probs.
     
  7. AaRoN

    AaRoN King Post Whore

    Messages:
    33,966
    Likes Received:
    38
    Joined:
    Sep 12, 2006
    Location:
    Orlando, Florida, United States
    i used a shop vac to clean out what i could. but the spark plugs (only a month old) were black when i pulled them but the passenger side ones were almost brand new looking :dunno: i put new plugs on the driver's side and it still has a little bit of a "miss" when it's at operating temp but not all the time now. ;i am totally stumped now :dunno:
     
  8. quickstang_1994

    quickstang_1994 Well-Known Member

    Messages:
    2,208
    Likes Received:
    12
    Joined:
    Apr 30, 2006
    Location:
    Cross Anchor, SC
    clean your o2 you shouldn't have one side different from the other. Then reset your computer(disconnect battery for 5 min)