Any way to lower idle without a tuner?

Discussion in 'Fox 5.0 Mustang Tech' started by Bigstang1, Aug 17, 2006.


  1. Bigstang1

    Bigstang1 Founding Member

    Joined:
    Aug 29, 2002
    Messages:
    415
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Massachusettes
    My 89 has a b-cam and 1.7 rr that i installed over the winter with crane valve springs. The springs were tired after 180k miles so i put the cam and rockers in at the same time since i got a good deal on them. Anyway, i'm having problems getting the idle where i want it. I have the idle screw almost totally closed with the tp set at .98v. and i still cant get it any lower than abo9ut 1000rpms. i had the timing at 10* and it was at about 800 which i could live with. recently i bumped base tioming to 18* (no detonation) and obviously that raised the idle. is there any way, without a pms or tweecer, to lower my idle back to about where it was? I heard somthing about a plate that goes betyween the tb and iac but cant remember what the guy said. thanks. ooo and if you could spare me the flames about a cam in a stock motor i would apprieciate it cause ive heard enough lol thanks again.
     
    #1
  2. jrichker

    jrichker StangNet's favorite TOOL SN Certified Technician Founding Member

    Joined:
    Mar 10, 2000
    Messages:
    21,816
    Likes Received:
    402
    Trophy Points:
    134
    Location:
    Dublin GA
    See "Help me create the Surging Idle Checklist" at http://forums.stangnet.com/showthread.php?t=534062
    for help with your idle problems. The first post contains all the updates to the fixes. I continue to update it as more people post fixes or ask questions.
     
    #2
  3. postalbunny

    postalbunny Member

    Joined:
    Oct 26, 2005
    Messages:
    118
    Likes Received:
    0
    Trophy Points:
    17
    If you have the idle screw backed all the way out, and the idle air controller unplugged and your idle is still at 1000rpm i'd check the vacuum. A leak would let more air in like an open idle air controller would... causing idle to go up.
     
    #3

Share This Page