Still idle surging...

[Srt4RacerDave]

Still attempting to fix my idle surge and I need some solutions. I cleaned out the throttle body. About 50 minutes ago, I replaced the idle air control valve/sensor. It seemed different, but it was still surging. Someone told me it could take for up to a week for the ECU to recognize the new valve and idle normally? It idles between 1100-1250 RPMS. When I first put the valve in, I'd pull up to a light and it would surge twice and then idle normally. Then, after driving it for a bit, it started to surge again. Could it be fixed, just not driven enough yet? Also, if anyone has any other suggestions on how to fix this, I'd appreciate it. I heard if one of the duel injectors was clogged or something, it would cause this. So I checked the spark plugs and they were all the same color, so I dont think that's the case.

 

[badas93tsi]

Good luck fighting this, I've fought it ever since I bought my car in 01. I've even removed the entire lower portion of the tb and it still surged. I'm also on AEM, so its not a boost leak causing it. Most likely its the fiav, which I've never blocked off and let the isc do all the work. JMFab sells a block off plate, thats a cheap way of checking it. Again......GOOD LUCK

 

[Srt4RacerDave]

Oh, forgot to mention. I also replaced the throttle position sensor about a month ago, so i can eliminate that. What would blocking off the fiav do/find out?

 

[boostngsx]

Try buying a new ISC. There is a good sale going on I just got one.

 

[Srt4RacerDave]

By ISC do you mean the idle air control valve? The thing that has two screws that holds it into the throttle body?

 

[boostngsx]

No the Idle Speed Controller. There is a sale going on right now if you want to pick one up.

http://www.dsmtuners.com/forums/vendor-announcements/305978-dsmisc-com-idle-speed-controller-isc.html

 

[Srt4RacerDave]

Yeah, I looked at the picture of what they are selling on their site. It's exactly what I replaced. So I guess NAPA just calls it something differently.


Heres an update on what happens:

I will get to a light, itll idle surge once or twice, and then idle normally. Itll do that for awhile, and then just start surging again. I will turn the car off, and it'll surge once or twice and then balance out again. Is this unusual or what?

 

[boostngsx]

That sucks man. Try reading this it may help you.

Terry's Talon Troubleshooting Tips #3 - Fast Idle (aka. Idle Surge)

 

[akura]

Have you replaced the o-ring on your biss screw?

 

[Srt4RacerDave]

Not yet. That'll be my next fix. Ever since the ISC set in after 10 miles or so, the surging seems to be 500% better. It will maybe only do one surge when i stop at a light and then be fine for a while ago. I also turned the idle from 1250 to 700 and it seemed to like that.