Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

Better Fuel Economy But...

Discussion in 'VN - VP Holden Commodore (1988 - 1993)' started by 88GreenVN, Jul 20, 2006.

  1. 88GreenVN

    88GreenVN Next Exit Left

    Messages:
    6,793
    Likes Received:
    125
    Trophy Points:
    63
    Joined:
    Jun 12, 2006
    Location:
    Surprise, Arizona
    Members Ride:
    Dodge Ram Van 1500 5.2 V8
    I have replace most things to do with the ignision on the wagon 3.8 includong the oxy sensor, CAS, DFI, Core pack and now getting around the 11L/100km around town. It had fallen to 15L/100km and ran as ruff as a dog stalling and so on.
    But now the idle is all over the shop. Could this be the Throttle Body Sensor? Or the other bit that screws into the throttle body with the TBS. or something else? Has good power throu the rev range.
     
  2. HATER VP

    HATER VP Guest

    Any codes?
     
  3. greenfoam

    greenfoam New Member

    Messages:
    7,900
    Likes Received:
    124
    Trophy Points:
    0
    Joined:
    Jan 13, 2005
    Members Ride:
    VP Executive R-spec
    The IAC valve in the throttle body controls the idle, some VN's like to get a bit of idle surge going as if they are running a top fuel cam. rrrRRRRRRRRRrrrrrrRRRRRRRRRrrrrrrrrrrrRRRRRRRRRRRRrrrrrrRRRRRRRRRrrrrr like that, worth trying to clean the IAC valve out and with some carbon cleaner and tissues, clean the throttle body out where the IAC valve travels up and down in it and the little valve and spring, see if that fixes it, the motor itself might be dead but try cleaning everything first
     
  4. S Pack

    S Pack Topped out @ 230kph

    Messages:
    224
    Likes Received:
    3
    Trophy Points:
    0
    Joined:
    Jul 11, 2005
    Location:
    Germany, Europe
    Members Ride:
    Mercedes E-Class 2007, E220 CDI Wagon
    my mechanic said to give the TPS a clean just before reconecting as is oxidises quickly.my idle was rough and sometimes stalling until i got that done.
     
  5. Full Spectrum

    Full Spectrum Bro it's a VW your Audi!

    Messages:
    2,411
    Likes Received:
    14
    Trophy Points:
    0
    Joined:
    Dec 6, 2003
    Location:
    Melbourne
    Members Ride:
    Berlina V6
    Sounds a touch like my car after i did the Oxygen sensor the idle was ruffer after warm starts.
     
  6. 88GreenVN

    88GreenVN Next Exit Left

    Messages:
    6,793
    Likes Received:
    125
    Trophy Points:
    63
    Joined:
    Jun 12, 2006
    Location:
    Surprise, Arizona
    Members Ride:
    Dodge Ram Van 1500 5.2 V8
    Thanks people. Throttle body out tomorrow. Cleanning the bits. see what that does. Cheers.

    PS no codes.
     
    Last edited: Jul 23, 2006
  7. 88GreenVN

    88GreenVN Next Exit Left

    Messages:
    6,793
    Likes Received:
    125
    Trophy Points:
    63
    Joined:
    Jun 12, 2006
    Location:
    Surprise, Arizona
    Members Ride:
    Dodge Ram Van 1500 5.2 V8
    The throttle body is clean. While it was apart I put a new set of plugs and leads and just under No. 2 plug the exhaust manifold is cracked along the weld. I guess this could be upsetting the idle a bit. That's the next job....
     
  8. Full Spectrum

    Full Spectrum Bro it's a VW your Audi!

    Messages:
    2,411
    Likes Received:
    14
    Trophy Points:
    0
    Joined:
    Dec 6, 2003
    Location:
    Melbourne
    Members Ride:
    Berlina V6
    I don't know if that would really as i had a passenger side crack that started as a hair line fracture and ended up being a big arse crack, But the car still went good.
    But they are common to do that they are pretty ****, No-wonder everyone gets Extractors:D
     
  9. 88GreenVN

    88GreenVN Next Exit Left

    Messages:
    6,793
    Likes Received:
    125
    Trophy Points:
    63
    Joined:
    Jun 12, 2006
    Location:
    Surprise, Arizona
    Members Ride:
    Dodge Ram Van 1500 5.2 V8
    Thanks for that...I have just got a cable for the ECU to download data. I'll see what that spits out.
     

Share This Page