Need help with idle surge!!

[red04svtcobra]

Noticed today after the cobra got warm on the drive home that when I came to a stop the idle would surge from around say 750 to around 1,100 and satay there for a couple seconds and then may drop again or stay there. I also noticed that the idle wasn't dropping a fast and was kinda dropping slow. What could this be?

 

[freight hauler]

Sorry, off topic here. I have a 04 Torch Red with same wheels. You have excellent taste and a beautiful cobra.

Freight Hauler
'04 TR #3160

 

[Jomo1994z71]

IAC, vacuum leak? Subscribing

 

[Juruense]

What mods?

 

[red04svtcobra]

Lots of bolt ons. Whats mods would you like to know?

 

[red04svtcobra]

Sorry, off topic here. I have a 04 Torch Red with same wheels. You have excellent taste and a beautiful cobra.

Freight Hauler
'04 TR #3160

Thanks:beer:

 

[Juruense]

Do you have an Accufab throttle body?

Has the car been professionally tuned and has anything changed since it was?

Is the a/c on when this is happening?

 

[utfan98]

I would look at the IAC first, they are easy to get to for cleaning. Next would be a a vacuum line, followed by a connector. I would stay out of the throttle until you solve the problem. You have a chance to run the car lean.

 

[FlaSeaDude]

I had a similar problem when I was running a BBK dual 65mm TB on my car. My tuner or I could never completely solve the issue so I replaced the BBK with an Accufab oval TB and the problem went away. :beer:

 

[red04svtcobra]

Do you have an Accufab throttle body?

Has the car been professionally tuned and has anything changed since it was?

Is the a/c on when this is happening?

I had a similar problem when I was running a BBK dual 65mm TB on my car. My tuner or I could never completely solve the issue so I replaced the BBK with an Accufab oval TB and the problem went away. :beer:

I use a cobra R single blade TB. Has been on there for a while now. I has been tuned on a dyno yes and nothing else has changed other than putting in new TR6 plugs gaped at .035. No AC was on either.

 

[red04svtcobra]

I would look at the IAC first, they are easy to get to for cleaning. Next would be a a vacuum line, followed by a connector. I would stay out of the throttle until you solve the problem. You have a chance to run the car lean.

Where is that? If this is the thing that is on top of the TB then I have already sprayed that with TB cleaner.

 

[Juruense]

Its worth a shot to clean IAC again, clean MAF, and then reset PCM may not fix it but hey it don't cost nothin.

 

[red04svtcobra]

How do I reset the PCM?

 

[Juruense]

Be sure and use residue free electrical contact cleaner or MAF cleaner on MAF.

Reset PCM by disconnecting the battery and tapping the brakes a couple times, guage sweep on first start indicates successful reset of PCM.

 

[Jomo1994z71]

I use a cobra R single blade TB. Has been on there for a while now. I has been tuned on a dyno yes and nothing else has changed other than putting in new TR6 plugs gaped at .035. No AC was on either.

Gap them at .032...especially since you are pullied...

 

[red04svtcobra]

Be sure and use residue free electrical contact cleaner or MAF cleaner on MAF.

Reset PCM by disconnecting the battery and tapping the brakes a couple times, guage sweep on first start indicates successful reset of PCM.

What does this do? Won't lose my tune will I?