TECH: Does your 4.6 GT shut off when idling or die while cruising?
Thread Starter
6th Gear Member
Joined: Jul 2003
Posts: 14,917
RE: Does your 4.6 GT shut off when idling or die while cruising?
ORIGINAL: JADAS2001GT
now lets say ur taking off when you hit bout 3000 rpms all power is lost even if you floor it what would be the cause of that the same or no. I took her to the dealer but they said there is nothink wrong but its happening again......... helpppppppppppppp
now lets say ur taking off when you hit bout 3000 rpms all power is lost even if you floor it what would be the cause of that the same or no. I took her to the dealer but they said there is nothink wrong but its happening again......... helpppppppppppppp
3rd Gear Member
Joined: Feb 2005
Posts: 655
From: Florida
RE: Does your 4.6 GT shut off when idling or die while cruising?
ORIGINAL: Dan02GT
Fuel Filter? Fuel Pump?
ORIGINAL: JADAS2001GT
now lets say ur taking off when you hit bout 3000 rpms all power is lost even if you floor it what would be the cause of that the same or no. I took her to the dealer but they said there is nothink wrong but its happening again......... helpppppppppppppp
now lets say ur taking off when you hit bout 3000 rpms all power is lost even if you floor it what would be the cause of that the same or no. I took her to the dealer but they said there is nothink wrong but its happening again......... helpppppppppppppp
This has nothing to do with the AIC (air intake controller)--At 3000 rpms, your throttle is opened plenty, so the iac valve is not functioning at all--As the guy above says, you're car is likely stalling because you need a tune up really badly--I'd go with a good fuel filter, air filter, plugs and wires. It might not be a bad idea to check your fuel pump too. The rest, just replace to be safe--tune ups on mustang v8s take about 30 minutes with ordinary garage tools. Ridiculously easy. Let us know what happens!
Gaspi
4th Gear Member
Joined: Feb 2005
Posts: 1,266
From: Iowa
RE: Does your 4.6 GT shut off when idling or die while cruising?
I am having this issue as well. I have this problem and also on some days there is a power loss which is quite annoying. On my last oil change, I replaced the fuel filter as well. The power loss is now completely gone. The other day it died on me when I tossed it in nuetral and was coming to a stop at a stopsign. So I've been watching it carefully the last few days. Slowing down and coming to a stop I can sit and watch the tach take a dive. A lot of times when I shift, I can see the tach jump 100RPM's as well.
I'm fairly confident it's the IAC, so I'll be replacing it soon. I'll probably be changing the wires soon to cover all the bases...I need a wire change anyway.
I'm fairly confident it's the IAC, so I'll be replacing it soon. I'll probably be changing the wires soon to cover all the bases...I need a wire change anyway.
2nd Gear Member
Joined: Jun 2005
Posts: 433
From:
RE: Does your 4.6 GT shut off when idling or die while cruising?
My GT almost dies when I roll to a stop soon after I've started it. Sounds like the IAC. Could someone post a pic or explian where it is / what it looks like so that I can clean the thing. Thanks.
3rd Gear Member
Joined: Feb 2005
Posts: 655
From: Florida
RE: Does your 4.6 GT shut off when idling or die while cruising?
Well, I don't have a pic, but it's pretty identifiable: You know where your plenum and your air intake body is right? The plenum is the piece with the horse on top, and the air intake is what connects the air filter to the throttle body and then to the plenum. OK, that being said, the IAC is the piece that is staring at you straight in the face when you look directly at the plenum when you stand in front of the car--it has a hose attached to it that leads directly to the air intake body.
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]
2nd Gear Member
Joined: Jun 2005
Posts: 433
From:
RE: Does your 4.6 GT shut off when idling or die while cruising?
ORIGINAL: Gaspi101
Well, I don't have a pic, but it's pretty identifiable: You know where your plenum and your air intake body is right? The plenum is the piece with the horse on top, and the air intake is what connects the air filter to the throttle body and then to the plenum. OK, that being said, the IAC is the piece that is staring at you straight in the face when you look directly at the plenum when you stand in front of the car--it has a hose attached to it that leads directly to the air intake body.
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]
Well, I don't have a pic, but it's pretty identifiable: You know where your plenum and your air intake body is right? The plenum is the piece with the horse on top, and the air intake is what connects the air filter to the throttle body and then to the plenum. OK, that being said, the IAC is the piece that is staring at you straight in the face when you look directly at the plenum when you stand in front of the car--it has a hose attached to it that leads directly to the air intake body.
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]
2nd Gear Member
Joined: Jun 2005
Posts: 433
From:
RE: Does your 4.6 GT shut off when idling or die while cruising?
Done, idle is fixed thanks for the help.
I also sprayed carb cleaner deep down the plenum, and it seems to instantly remove the grime that had built up.. of course it has only sent it down the manifold further.. so I took it for a hard run hoping to burn all the **** out while the carb cleaner still has it loose.
Anyway main thing is the idle is fixed.
I also sprayed carb cleaner deep down the plenum, and it seems to instantly remove the grime that had built up.. of course it has only sent it down the manifold further.. so I took it for a hard run hoping to burn all the **** out while the carb cleaner still has it loose.
Anyway main thing is the idle is fixed.
ORIGINAL: Dave2000GT
Awesome! Thanks for the info, I will be cleaning it tomorrow and I'll post my results.
ORIGINAL: Gaspi101
Well, I don't have a pic, but it's pretty identifiable: You know where your plenum and your air intake body is right? The plenum is the piece with the horse on top, and the air intake is what connects the air filter to the throttle body and then to the plenum. OK, that being said, the IAC is the piece that is staring at you straight in the face when you look directly at the plenum when you stand in front of the car--it has a hose attached to it that leads directly to the air intake body.
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]
Well, I don't have a pic, but it's pretty identifiable: You know where your plenum and your air intake body is right? The plenum is the piece with the horse on top, and the air intake is what connects the air filter to the throttle body and then to the plenum. OK, that being said, the IAC is the piece that is staring at you straight in the face when you look directly at the plenum when you stand in front of the car--it has a hose attached to it that leads directly to the air intake body.
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]
3rd Gear Member
Joined: Feb 2005
Posts: 655
From: Florida
RE: Does your 4.6 GT shut off when idling or die while cruising?
That wasn't that hard, was it? Now get some sleep knowing you've saved a good $150 at the mechanic. hehehehe....
ORIGINAL: Dave2000GT
Done, idle is fixed thanks for the help.
I also sprayed carb cleaner deep down the plenum, and it seems to instantly remove the grime that had built up.. of course it has only sent it down the manifold further.. so I took it for a hard run hoping to burn all the **** out while the carb cleaner still has it loose.
Anyway main thing is the idle is fixed.
Done, idle is fixed thanks for the help.
I also sprayed carb cleaner deep down the plenum, and it seems to instantly remove the grime that had built up.. of course it has only sent it down the manifold further.. so I took it for a hard run hoping to burn all the **** out while the carb cleaner still has it loose.
Anyway main thing is the idle is fixed.
ORIGINAL: Dave2000GT
Awesome! Thanks for the info, I will be cleaning it tomorrow and I'll post my results.
ORIGINAL: Gaspi101
Well, I don't have a pic, but it's pretty identifiable: You know where your plenum and your air intake body is right? The plenum is the piece with the horse on top, and the air intake is what connects the air filter to the throttle body and then to the plenum. OK, that being said, the IAC is the piece that is staring at you straight in the face when you look directly at the plenum when you stand in front of the car--it has a hose attached to it that leads directly to the air intake body.
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]
Well, I don't have a pic, but it's pretty identifiable: You know where your plenum and your air intake body is right? The plenum is the piece with the horse on top, and the air intake is what connects the air filter to the throttle body and then to the plenum. OK, that being said, the IAC is the piece that is staring at you straight in the face when you look directly at the plenum when you stand in front of the car--it has a hose attached to it that leads directly to the air intake body.
What happens is that this hose delivers the air directly from the air intake witout having to go to the throttle body--meaning that this passage is where the air comes into the engine when the throttle butterfly is follu closed (you're not pressing the accelerator). That piece connected to the plenum has the connection to this hose--it is relatively easy to remove the hose, as it's not clamped down--the IAC is held to the plenum by two bolts that are also very easy to remove.
What I have done for you, however, is draw a red arrow where the IAC goes on my old plenum/manifold pic I have. Hope it helps. Cheers!!
[IMG]local://upfiles/12394/F26F5F1CCC7D406990EFBF3E4ADC4E8F.jpg[/IMG]