iac

  1. Z

    4.2 Intake Manifold need help

    Hello all, I’m pretty new to the forum and this is my first post. I have a 2004 3.9 V6 and I swapped the upper intake manifold from a 4.2 onto it. I pretty clearly made a mistake, as my car now thinks it is at 18% throttle position (checked with live feed obd2 reader) when I’m completely off the...
  2. AydenTv

    Little Known Little Issues Thread

    87 to 89 Foxbodys are notorious for having little issues.. But lets Create a Thread on Little Known Little Issues for 1987 to 1989 Foxbody Mustangs... 1. The Spout Connector.... The Spout Connector, located near the Distributor and TFI Module, is like a Vaccum Advance.. In order to Set your...
  3. 0

    4.6 2v SOHC 2k rpm Idle, help reading engine data

    Hey guys, I own a 2002 automatic mustang gt with: flow master CAI flow master H pipe just had an engine swap done with a rebuilt 78mm bbk throttle body SCT/Bama tune I’ve had about 900 miles since rebuild. Originally when I got the Car back from the engine install it had the same problem, 2k...
  4. Hudson N

    Should it run with IAC unplugged? 04 gt

    I've been having surging issues for a couple of months now. I replaced my IAC and checked for vacume leaks and tested my TPS. The surge is only slight. Maybe 25-50 rpm when its warm and on a real cold start it surges quite a bit for about a minute before smoothing out. I've done a reset and I've...
  5. B

    Yes Its Another High Idle Problem

    Hey guys, Ive been lurking on this forum for awhile trying to figure out this issue but Im at the point where I have no idea what else to do. So Ive got an 01 Cobra that has the 1500+ idle surge problem. Im pretty sure Ive done all the fixes that I found here. I replaced the TPS and IAC. I...
  6. N

    High Hanging Rpm Issues(2004 Gt)

    Disclaimer: I spent extensive time reading all posts I could find similar to this issue (I know about the infamous 4.6 hang issue) and replacing what I could, but still to no avail. Also a MASSIVE thank you to all the folks here that helped me get this far just from lurking and reading the...
  7. R

    Engine Idling Issue

    Hey everyone, need a more car savy feller to assist me today. Here's my issue: My 03 GT was beginning to stall whenever I slowed down at a light, sign, etc but it idled fine. My first thought was the IAC was going bad. So, after finding one at autozone, I replaced the part and solved the...
  8. B

    Iac / Overheating Woes - Progress And Questions

    Hello all! Progress is being made, albeit more slowly than I would like. A little backstory, though... I traded an older truck that I had for my first Mustang - a 1998 GT with all the bolt-ons and some other miscellaneous work. The car runs and sounds fantastic. I drove the car for about 2...
  9. S

    99 Gt Intermittent Driveability Problems

    Hey guys, New member, i have used this site's knowledge in the past on many issues ( thanks for that), but I've come to a problem I need to reach out to you guys. I am on many different forums, bikes, motorcycles, chevy truck etc.. so let me start by saying thanks for looking at a new post by a...
  10. NRB Auto

    01 Gt Cold Start Idle Fluctuation?

    I have a 2001 GT, NOT ALWAYS but usually only in direct morning under "cold start" conditions I will get a high idle of 1,600RPMS. Now and then if you put it in gear it will drop RPMS and die out. If you restart the mustang right away idle will return to normal. If not about every 30 seconds or...
  11. 02shtangGT

    Engine Strange Humming/growling Noise Behind Dash?? 02 Mustang Gt

    Okay well randomly there will be a growling noise coming from behind the dash. I have experimented a lil and found that it might have to do with the IAC. Most of the time when the AC is on and i quickly shut it off it can be heard for a second or two. It has been a problem that has been...