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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Cold Start Problem?

  • Thread starter Thread starter ponyguy
  • Start date Start date Dec 15, 2003

ponyguy

New Member
Apr 16, 2003
189
0
0
Chicago
Dec 15, 2003
#1
  • Dec 15, 2003
  • #1
So here's the scenario. My car is not a daily driver and sits usually for 1-2 weeks at a time. As of Saturday morning it had been sitting for about 1 week. Car has 52,000 miles and no prior symptoms of any kind.

In this time the temp here in Chicago has dropped and been hovering in the 20-30 range.

So i go to start it and the car fired right up and then would die. I tried again, same problem, again I try, same problem. So I decide to hold revs up above 1000 with gas and it will stay running, but if I let revs drop it dies. After about 6-7 times of holding revs up like this, it stayed running on its own.

Went driving for 20 minutes or so, parked at home depot for a bit, scome out, and it starts right up. Next day Sunday, does the same thing on the 1st start. 2nd time I give her some good revs and it stays running after.

I am new to Ford computers and sensors and still learning. Cold start enrichment comes to mind, but that is the old GM guy in me. Battery voltage appears to be fine. What could this be????
 
S

ScottJ

Founding Member
Oct 29, 2001
1,117
0
0
Birmingham, AL
Dec 15, 2003
#2
  • Dec 15, 2003
  • #2
Search here for idle air control (IAC) valve. Sounds like yours is sticking.

Mine has done that. I need to replace it but for a field expedient you can whack with your pocket knife (worked for me).
 

stangman

15 Year Member
Jul 10, 2003
2,690
10
69
in a 3 bed, 2 bath
Dec 15, 2003
#3
  • Dec 15, 2003
  • #3
ScottJ said:
Search here for idle air control (IAC) valve. Sounds like yours is sticking.

Mine has done that. I need to replace it but for a field expedient you can whack with your pocket knife (worked for me).
Click to expand...


i'm with him whenever it starts acting like a carburtated car that's usually the culprit
 

ponyguy

New Member
Apr 16, 2003
189
0
0
Chicago
Dec 15, 2003
#4
  • Dec 15, 2003
  • #4
interesting, where is said IAC, and how much is a replacement.
 
S

ScottJ

Founding Member
Oct 29, 2001
1,117
0
0
Birmingham, AL
Dec 15, 2003
#5
  • Dec 15, 2003
  • #5
Replacement is about $60 from GEF Racing.

It's on the front of the plenum on top of the intake (sorry don't have pics).

You could try cleaning it first. Just make sure you use fuel injection spray cleaner not carb cleaner. There's a coating on FI parts that regular carb cleaner will take off.
 
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