car wont idle first thing in the morning

3

347lxvert

Member

Dec 1, 2005

135

0

16

Russellville, AR

Oct 7, 2006

#1

• Oct 7, 2006

• #1

i have a 94 cobra, it runs great most of the time, but if it has been sitting all night or sometimes, if i drive it to work and let it sit for a few hours and it cools off, it will not idle at all. what is the deal? it idles fine once the temp comes up. i have replaced the ect, act, i dont know what else to check or replace.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Oct 8, 2006

#2

• Oct 8, 2006

• #2

Has the IAC been cleaned?

Does it also bog when you turn the AC on?

Good luck.

 

94mustangcobra

Member

Sep 29, 2006

126

0

16

Valdosta, GA

Oct 8, 2006

#3

• Oct 8, 2006

• #3

i haven't replaced my ect/act but i did clean my IAC and the throttle body. my car bogs and sometimes stalls out when i turn on A/C, and it bogs sometimes just when i'm sitting there and i turn the steering wheel. sorry this doesn't help 347lxvert, but i have similar probs.

 

1TallMF

New Member

Apr 17, 2006

955

1

0

Montreal

Oct 8, 2006

#4

• Oct 8, 2006

• #4

Mine would do that last year in the fall, it would start fine, then the idle would get lower and lower and I'd have to give it gas to keep it from stalling, plus it would bogg on acceleration at every intersection. But then it would run normally after about 3 or 4 minutes of driving. A new ECT solved this issue for me.

 

3

347lxvert

Member

Dec 1, 2005

135

0

16

Russellville, AR

Oct 8, 2006

#5

• Oct 8, 2006

• #5

i have cleaned the iac and replaced the ect already, it just started doing this a couple of weeks ago, someone locally said there car (not a mustang) had a pinhole in the filler neck of their gas tank and he had to replace that. it sounded kind of strange to me, but i thought i would see if anyone else had the same problems. the weird thing is that it runs fine after it reaches normal operating temp.

 

blurry

New Member

Mar 20, 2006

31

0

0

Maryland

Oct 8, 2006

#6

• Oct 8, 2006

• #6

1TallMF said:

Mine would do that last year in the fall, it would start fine, then the idle would get lower and lower and I'd have to give it gas to keep it from stalling, plus it would bogg on acceleration at every intersection. But then it would run normally after about 3 or 4 minutes of driving. A new ECT solved this issue for me.

Click to expand...

Mine does the same thing in the morning or if it hasnt been driven in awhile on a cold day.

 

juiced_94gt

Active Member

Mar 30, 2005

1,143

0

36

Southern California

Oct 8, 2006

#7

• Oct 8, 2006

• #7

mine bogs with the a/c and on hot days it will just die at idle and sometimes almost stalls out when i come to a stop and turn the wheel...whats the deal is it the intake temp sensor? i've cleaned it but some people say that it will go out and not just be dirty, i changed the ect a couple of years ago with a for unit so i dont know if thats the problem.

 

1TallMF

New Member

Apr 17, 2006

955

1

0

Montreal

Oct 8, 2006

#8

• Oct 8, 2006

• #8

The first ECT I bought form Napa lasted 8 months. I just replaced it again recently because I noticed the fan wasn't coming on. They warrantied it, which was good. Ford wanted $72 for it. That was hilarious.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Oct 8, 2006

#9

• Oct 8, 2006

• #9

juiced_94gt said:

mine bogs with the a/c and on hot days it will just die at idle and sometimes almost stalls out when i come to a stop and turn the wheel...whats the deal is it the intake temp sensor? i've cleaned it but some people say that it will go out and not just be dirty, i changed the ect a couple of years ago with a for unit so i dont know if thats the problem.

Click to expand...

That's still the IAC. It compensates for the load of the AC. Yours is not cutting it.

Good luck.

 

juiced_94gt

Active Member

Mar 30, 2005

1,143

0

36

Southern California

Oct 9, 2006

#10

• Oct 9, 2006

• #10

just to clarify, whats the IAC because im a little confused right now, is it the air idle control valve or the air intake temp sensor on the cold air tubing?

 

S

Sompin2do

New Member

Nov 30, 2004

59

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0

TX

Oct 9, 2006

#11

• Oct 9, 2006

• #11

It's the Idle Air Control Valve

 

Stanger007

Founding Member

Sep 26, 2001

2,015

2

46

Baton Rouge, LA

Oct 9, 2006

#12

• Oct 9, 2006

• #12

Do ya have longtubes by chance?

With the weather starting to change, my O2s just started getting cold first thing in the morning - it jumps to closed loop and then the idle is a bit rough - my fix is to force open loop at idle... gotta have a twEECer or other tuner to do this.

 

3

347lxvert

Member

Dec 1, 2005

135

0

16

Russellville, AR

Oct 9, 2006

#13

• Oct 9, 2006

• #13

Stanger007 said:

Do ya have longtubes by chance?

With the weather starting to change, my O2s just started getting cold first thing in the morning - it jumps to closed loop and then the idle is a bit rough - my fix is to force open loop at idle... gotta have a twEECer or other tuner to do this.

Click to expand...

as a matter of fact i do have long tubes, hmm, i dont have a tuner of any kind, is there anything else i can do?

 

Stanger007

Founding Member

Sep 26, 2001

2,015

2

46

Baton Rouge, LA

Oct 9, 2006

#14

• Oct 9, 2006

• #14

Try some of the simple stuff first... check the IAC as mentioned above - also try cleaning the MAF if you haven't done this.

 

95Vert

New Member

Aug 19, 2004

1,785

0

0

North Mexico (deep south Texas)

Oct 9, 2006

#15

• Oct 9, 2006

• #15

Stanger brings up a good point. My car does exactly the same thing, after a couple of minutes it idles and drives fine. I really haven't looked into it but since you already replaced the act and ect, at least clean the iac and the maf and see what it does. just my .02.