Hanging rpm- will this fix it?

Discussion in '1994-2004 V6 Mustang Tech' started by kgmx856, Aug 26, 2009.

  1. kgmx856 Dirtbike Aficionado

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  2. kgmx856 Dirtbike Aficionado

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  3. joekd GT geek

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    Just make your own, I made mine out of sheet metal but you can also do it with gasket material also

    Take off your IAC, trace the gasket, cut it out and make the air hole smaller, bolt it on, done
     
  4. kgmx856 Dirtbike Aficionado

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    Sweet
     
  5. joekd GT geek

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    You can make an EGR restrictor plate the same way as well
     
  6. kgmx856 Dirtbike Aficionado

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    Yeah I know that, I just gotta figure out how to send in my tune to turn it off.
     
  7. fish2k6 Page 36 Club

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    Yes the Mach one will work, I have one. I don't remember how much I paid, but I know I got it on ebay and it was less than that.
     
  8. kgmx856 Dirtbike Aficionado

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    Which hole goes where? Which side does the smaller hole go?
     
  9. fish2k6 Page 36 Club

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    I did it like the pics on the ebay page.
     
  10. kgmx856 Dirtbike Aficionado

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    I just tried it. It didnt help one bit. The small hole was just as small as the one from ebay.
     
  11. untamed04roush STG ONE

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    this thread got me thinking, I had the same problem with hanging RPMs. I saw the restrictor plate on ebay as well and I decided to make my own. I made mine out of an old oil bottle, I cut it to match the size of the gasket and drilled 4 holes in it (2 holes per port) and the results are awsome. No more hanging RPMs they fall as quickly as they climb and Idle RPMs stay right at about 720 this is a great mod.
     
  12. kgmx856 Dirtbike Aficionado

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    What size of holes did you put in it?
     
  13. untamed04roush STG ONE

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    I think I used a 1/4'' drill bit
     
  14. Ltngdrvr Active Member

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    I just did this to my car today. I used .026" aluminum and put a 1/2" hole on the inlet side (fender side) and a 3/16" hole on the outlet side (motor side) and it seems to work like it is supposed to. My car actually SLOWS DOWN when you take your foot off the throttle pedal!;)

    I never have been able to get used to the rpm's hanging between shifts so unless I was going all-out I wasn't doing very well shifting. Works much better for me now. We'll see how it does now in my daily drive to and from work.

    The rpm's do drop down very low when you let off after you blip the throttle, drops down around 500 for a split second before picking back up.
     
  15. kgmx856 Dirtbike Aficionado

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    I must have a vacuum leak somewhere cause my hole was tiny and didnt really lower the rpm at all.
     
  16. Ltngdrvr Active Member

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    If your rpm's are just staying high all the time then you most likely do have a vacuum leak and this mod definitely won't fix it.

    This mod is for when the rpm hangs between shifts or drops slowly when you let off the throttle.
     
  17. Ltngdrvr Active Member

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    Amazing how much better the car drives now. Sure glad I stumbled across this mod.
     
  18. untamed04roush STG ONE

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    deffanently something Ford should have stumbled upon.
    the car feels crisp and stout.
     
  19. Ltngdrvr Active Member

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    One thing I will have to watch, this evening when I started it up after work and turned the a/c on the idle went below 500 for a few seconds until it got a little heat started in it. Felt like it almost wanted to die, but idled up after 15-20 seconds.