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  1. 1999-2004 Mustang GT Misfire? Please help!

    4.6L Tech
    I have 2001 Mustang GT that i bought a few months ago from craigslist. When I first bought it, the car ran great, I could hit redline no problem, but then the first time I took it to the track for drifting I started having problems. After a few runs, when i would clutch kick the car had...
  2. Idle surging problem

    5.0L Tech
    Hey guys me again, It seems I cant keep go a single week without a major issue coming up on this thing so here's the deal now. I fixed the break up issue I talked about before with a new distributor but the car still wont idle. I have an a9l and an sct chip and I'm starting to believe I have a...
  3. Surging around 1700 RPM - 2005 Mustang GT Automatic

    2005-2010 Mustang GT Tech
    Hello, My father met with Dan from pro-dyno in Winston-Salem last year to tune my S197 mustang. Dan may remember the case, but we were having problems with the car surging in 5th gear around 1500-1700 RPMs. After taking a ride with my father to witness the problem, he mentioned that he thought...
  4. $%$&! Engine Management!!! 1989 5.0 / 302

    5.0L Tech
    I am in the beginning stages of my first project car, a 1989 Mustang GT Convertible. I have had a lot of fun times so far. This is not one of those times. My mechanical ability at this point is somewhat limited, so excuse me if I contradict myself or otherwise talk out my butt. :winks I have...
  5. Coolant in Spark Plug Holes 2000 GT

    4.6L Tech
    I have a 2000 Mustang GT with 152,000 miles and a manual tranny. I am getting a surge and buck when accelerating so I checked my COPs and there was coolant on the ones on the drivers side. The passenger side COPs are perfectly dry. I looked in the holes of the driver side and found puddles of...
  6. Tire Size and Surge Problem, 92 GT

    5.0L Tech
    Hey guys, I'm new to the forums and I signed up because after extensive google'ing I still haven't managed to find the answers to my questions! :shigrin My first question is about tire size. I know there are threads upon threads of this and I've looked at them all but still haven't managed to...
  7. Help trouble shooting an idle issue. 1990 GT

    5.0L Tech
    Hello, I have had this idle issue for some time now. Cant seem to figure out what it is. My car will idle fine then when it gets warmed up it surges and drops and keeps doing this until the car stalls. If I unplug my IAC the car will idle all day long. As soon as i drive it it wants to stall and...
  8. Bucking in 3rd gear issue

    4.6L Tech
    My 2000 Mustang GT (142,000k) seems to "buck/surge/miss" (aka jerking back/forth slightly) when accelerating in 3rd gear, and every once in a while in 4th. It seems to do it when going up hills under heavier acceleration. I've read that a bad fuel filter could cause this? BTW, i obviously have a...
  9. 1991 Mustang will barely run.

    5.0L Tech
    Ok- here goes. I recently added ported GT40 heads, Performer intake, BBK 70mm tb, shorty headers and TFS stage 1 cam to my stock shortblock. When I first fired the car up, I set the timing to 14 degrees. Fuel pressure was close to 40psi. The car would surge and buck like crazy at steady rpm's...
  10. 1990 LX 5.0 Idling rough... IAC? EGR? TPS?

    5.0L Tech
    Hello, I'm a new member here... Just bought my 1990 white LX 5.0 Hatch 5 spd with only 60k original miles 2 weeks ago. It's in great shape. Interior is near perfect and paint is great. It has a rough idle, not bad, just a little rough. I gave a full tune up including cap and rotor, plugs and...
  11. Anyone have this idle problem?

    2011-2014 Mustang Talk
    Hi Folks, Have an annoying problem with my 2011 GT Premium 6 speed. First thing in the morning when I start it up (have AC on as in Az) the idle swings from about 1000 to about 300. Makes going in first an interesting experience as the car surges and tries to stall. After about a mile issue...
  12. Erratic Idle when stopped and AC is on... 1999 Mustang GT

    4.6L Tech
    I have a 1999 GT and I am having really bad idle surges when the AC is on and I come to a complete stop. The idle is fine when I have the AC on and the car is in in traffic...the idle surges from 300rmp to about 1400rmp and does this for the duration of time that I am stopped....sometimes it...
  13. 1990 Mustang gt Idle problems, does the iac affect how it runs when disconnected?

    5.0L Tech
    hello everyone, I have a 1990 GT thats heavily modded. I am having problems with the my car idling. After I start the car and let it warm up for 30 or 40 seconds the car idles fine, after that, then the idle surges up and then drops, lets say from 750-800 (due to cam and other mods) to...
  14. 1993 Mustang Lx idle problems

    5.0L Tech
    I got a 93 notchback lx. I changed the headgaskets and ever since I did that the stang has had a weird idle problem. It starts, revs to like 3500-4000 rpm's then it just dies and doesnt want to stay running. Any help would be awesome. Thanks