very odd ideling problem.....Much help needed

big o car 4.6

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Jan 3, 2002

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dallas

Jul 1, 2005

#1

• Jul 1, 2005

• #1

For the last couple of months my car has been has been have very minor surges in the RPMs at idle, and when I turn on my A/C it really surges. My check engine light come on when I'm cruising at one speed for an extended period of time, (i.e. highway driving) and then will shut of when cruising around the city. So I can never seem to get a chance to get the codes read because the light does not stay on long enough. Furthermore I'm looking into selling the car this weekend and would really like to get this problem resolved before then if possible, so any help would be much appreciated. Thanks



-Ashton

 

D

Dragstr05

New Member

Dec 21, 2004

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Stafford VA

Jul 1, 2005

#2

• Jul 1, 2005

• #2

Did you have the A/C recharged? It is possible that it was overcharged. Im having the same problem (minus the check engine light) because I put a can of R134A in my protege, but there is too much in the system. I have not had the chance to drain the system yet though.

Do you have a scanner yourself? I guess if you have you have already tried, but the DTC's might still be there if you havent tried scanning for codes.

 

big o car 4.6

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Jan 3, 2002

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dallas

Jul 2, 2005

#3

• Jul 2, 2005

• #3

Dragstr05 said:

Did you have the A/C recharged? It is possible that it was overcharged. Im having the same problem (minus the check engine light) because I put a can of R134A in my protege, but there is too much in the system. I have not had the chance to drain the system yet though.

Do you have a scanner yourself? I guess if you have you have already tried, but the DTC's might still be there if you havent tried scanning for codes.

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no, my R144A is empty, but thanks

 

CanadaStang

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Sep 7, 2003

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Mb

Jul 2, 2005

#4

• Jul 2, 2005

• #4

Just have someone read the codes for you. The problem code will be stored in the EEC's memory, regardless if the light is still on or not.

 

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AquamanCHS

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Sep 17, 2003

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N. VA

Jul 2, 2005

#5

• Jul 2, 2005

• #5

The codes should be stored even if there is no light. It could be an oxygen sensor - I had the same symptoms when my O2 sensor went bad.

 

fudleyd

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Jan 10, 2003

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Littleton, CO

Jul 2, 2005

#6

• Jul 2, 2005

• #6

I would have the codes read too, could help you identify the problem...

 

csledd

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Aug 18, 2001

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Paducah, KY

Jul 2, 2005

#7

• Jul 2, 2005

• #7

yeah if you have a hand held tuner that can read them pull those codes off! if not head over to autozone, they should be able to help you out

 

big o car 4.6

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dallas

Jul 7, 2005

#8

• Jul 7, 2005

• #8

I'll give that a shot. thanks

 

94MustangGT5.0

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Apr 30, 2003

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Champaign, Illinois

Jul 7, 2005

#9

• Jul 7, 2005

• #9

more than likely its you air idle control, try unplugging it while its running if it makes no differance thats probably it, the idle should change if it is good, thier around 80 dollars from ford.

 

big o car 4.6

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dallas

Jul 21, 2005

#10

• Jul 21, 2005

• #10

94MustangGT5.0 said:

more than likely its you air idle control, try unplugging it while its running if it makes no differance thats probably it, the idle should change if it is good, thier around 80 dollars from ford.

Click to expand...

So I should unplug it when the car is on and the A/C is running and if still is surging then that is my problem?

 

K

Kilgore Trout

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Mar 30, 2005

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Jul 21, 2005

#11

• Jul 21, 2005

• #11

I also think it is the IAC (it always is...)