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  • SN95 4.6L Mustang Tech

won't idle

  • Thread starter Thread starter stangnutlx
  • Start date Start date Jan 14, 2009

stangnutlx

New Member
May 24, 2005
242
0
0
Coventry, RI
Jan 14, 2009
#1
  • Jan 14, 2009
  • #1
2001 GT 5 speed, Car has been sitting for about 2 weeks i went to run her today but it starts the dies. Restarts then dies. I start it and hold the throttle and it runs fine but wont idle.

Any ideas what it could be? It did it to me once before but i let it sit for 20 mins and went back out and it ran fine.
 

evil281

New Member
Jan 6, 2008
276
0
0
Arizona
Jan 14, 2009
#2
  • Jan 14, 2009
  • #2
bad iac? sounds like a fun one to figure out
 

bhuff30

Founding Member
Dec 11, 2001
6,037
35
129
Olathe KS
Jan 14, 2009
#3
  • Jan 14, 2009
  • #3
It is definately because of the idle control valve.

The idle control valve on my 97 has been sticking in cold weather. It does exactly the same thing as you described. If I drive it, once the valve gets some heat, it unsticks and idles properly. In my case, I removed the valve and cleaned it well. Seems to be working so far, but the best solution would be to replace it. I cleaned mine last winter and it worked great until the temps got into the teens again this winter.

So in short, replace the idle control valve. It's very easy. If you don't want to spend any money, you can take it off, and clean it up, and it might start working again.
 

stangnutlx

New Member
May 24, 2005
242
0
0
Coventry, RI
Jan 14, 2009
#4
  • Jan 14, 2009
  • #4
bhuff30 said:
It is definately because of the idle control valve.

The idle control valve on my 97 has been sticking in cold weather. It does exactly the same thing as you described. If I drive it, once the valve gets some heat, it unsticks and idles properly. In my case, I removed the valve and cleaned it well. Seems to be working so far, but the best solution would be to replace it. I cleaned mine last winter and it worked great until the temps got into the teens again this winter.

So in short, replace the idle control valve. It's very easy. If you don't want to spend any money, you can take it off, and clean it up, and it might start working again.
Click to expand...

This is my first mod motor car. Are the gaskets on these cars Orings or real gaskets?
 

bhuff30

Founding Member
Dec 11, 2001
6,037
35
129
Olathe KS
Jan 14, 2009
#5
  • Jan 14, 2009
  • #5
It's mostly real gaskets. The idle control valve is a gasket. My gasket broke into a bunch of small pieces last time I had the valve off, and it doesn't seem to have any vacume leaks.
 

stangnutlx

New Member
May 24, 2005
242
0
0
Coventry, RI
Jan 14, 2009
#6
  • Jan 14, 2009
  • #6
bhuff30 said:
It's mostly real gaskets. The idle control valve is a gasket. My gasket broke into a bunch of small pieces last time I had the valve off, and it doesn't seem to have any vacume leaks.
Click to expand...

hope there not big bucks like a 5.0L
 

timeless2

Vi Veri Veni Versum Vicus Vici
Admin Dude
Nov 29, 1999
1,366
202
154
the Shadow Gallery
Jan 14, 2009
#7
  • Jan 14, 2009
  • #7
As stated, the IAC valve is more than likely the culprit.
 

Bluffing024

Active Member
Mar 15, 2006
0
2
48
Somewhere
Jan 14, 2009
#8
  • Jan 14, 2009
  • #8
timeless2 said:
As stated, the IAC valve is more than likely the culprit.
Click to expand...

Yep, mine gave me problems on my 97 GT, sometimes tapping or cleaning it helps. Better to just replace it.
 

stangnutlx

New Member
May 24, 2005
242
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0
Coventry, RI
Jan 14, 2009
#9
  • Jan 14, 2009
  • #9
Thanks gentlemen!
 
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