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bad idle

  1. Rough Idle When Engine Warm

    V6 Off Topic Lounge
    Hello all, My 2000 3.8L has been acting strange lately. The past couple times the engine has been warm and I've turned off the car to run into the store or something and then come back to start it up it idles terribly acting like it's going to stall out and vibrates like crazy. It only seems to...
  2. 2000 mustang gt, bad idle, no power

    4.6L Talk
    ok i recently got a 2000 mustang gt auto:/, anyways it runs fine most of the time, but everynow and then itll have a really bad idle, like it sounds like a legit aftermarket cam, and you can put your foot on the peddle, dont matter how much but its just like its an old toyota pickup or...
  3. i cant set base idle

    5.0L Tech
    i cant seem to set base idle i unplug IAC and the car idles the same 1k rpm it randomly idles normal then at times it idles high 1.1k or 1.2k i just replaced the IAC today i have checked tps its set at 0.94 i did test it seems fine steady drops n inclines i ran codes got code 33 41 91 and i...
  4. 2006 Mustang GT Throttle Body

    2005-2010 Mustang GT Tech
    My car is in the repair shop and they want to replace the throttle body. Do I really need to change this? They want $700. I've searched the fourm and couldn't find anything similar to problems I am having. The car will not hold an idle after I replaced the battery. It idles when it's cold, but...
  5. mustang wont stay on

    5.0L Tech
    Hi guys this is my first post on the forum business. I just bought a 1987 5.0 notch back and it will not stay on:nono: I turn it on it stays on for a wile and then the idle stars to go up and down by its own, it does that for a wile and then it just turns off. it starts and it does the same...
  6. 2007 mustang gt o2 sensor problems tune?

    2005-2010 Mustang GT Tech
    Hi guys, I puchased a 2007 gt a month ago. It has 67,000miles looks great but has a couple of problems. The car has a C&L Intake and upgraded i believe long tube headers. My problem is that 1 o2 sensor is malfunctioning. Its stuck on lean. I was told by 'FORD' Its my intake. I dont believe that...
  7. low vacuum???and bad idle?

    2.3L Tech
    I have a 88 mustang that originally had the 2.3, I then swap out & put in a t-bird 2.3 turbo and transmission and ECU, I was following the steps provided by Stinger of right now I have the car at school for testing, I did a fuel pressure test and some compression tests , it...
  8. 1998 Mustang 3.8 Motor

    i have a 98' mustang and it idles bad and when i put it in gear "R" or "D" it will die. and it only happens when i push in the brake like at a stop sign or stop light. what is wronggg ? please help.
  9. 1968 289 Mustang-Massive vacuum leak, but i cant hear it...

    Classic Tech
    My 1968 289 is running like total crap in idle, shaking, low rpm, struggling to run, etc... but ONLY when it is warmed up and the choke is open. I hooked up a vacuum gauge and it was hardly pulling anything; so i have almost no vacuum. and when i manually close the choke while it is running, it...
  10. my car wont boost

    4.6L Tech
    i have a vortech v2 supercharger with an air to water intercooler... my card does not boost at all... its in a vacuum all the way to 140 mph
  11. 1989 Mustang 5.0 LX Idle Problem

    5.0L Tech
    I have had my Automatic 5.0 parked for quite a while due to a bad idling problem that seems to be getting worse. The car is nearly stock minus exhaust, pulleys, k&n, and other minor bolt-ons. I recently started it up and it seemed to be starving for air. Without pressing the accelerator it...