Surges at idle sometimes??

[viper5]

Well this one has me stumped, I have a '03 X 6.0 and when ever it feels the urge to it will surge just a idle. This only occures after it's warmed up and it may do this all day long or it won't do it for days . No codes or service engine light, hooked it to the scanner and ran all the tests and all ok.
It's been doing this for months and it doesn't seem to hurt anything but it drives me nuts because I know it's not right. Any suggestions

[2005F250]

ICP sensor. Brothers 03 6.0 got replaced and his surging idle went away.

[gcop]

Originally Posted by 2005F250

ICP sensor. Brothers 03 6.0 got replaced and his surging idle went away.

My suggestion as well....

[tugboat dave]

Thanks for the post my 03' is doing the same thing.

[viper5]

Thanks for the reply, I'll get one next week and post the result

[dhollowa]

Originally Posted by viper5

Thanks for the reply, I'll get one next week and post the result

So did this fix your problem

[viper5]

No the ICP sensor didn't fix the problem, but shortly after I changed the ICP sensor(2 weeks) it started to miss and I changed 2 injectors to correct that problem and it hasn't surged since. I have heard that most of the time it is the ICP sensor that causes the surging problem

[dhollowa]

How did you determine which ones to replace? Did you get diagnostic codes? My truck idles rough at times after it's warmed up and if the AC is on. It feels like it wants to stall. Sometimes it doesn't do it at all.

[viper5]

First I did a injector buzz test which it passed, then I did a cylinder contribution test and found #1 & 5 were not fireing

[dhollowa]

Did you have these tests run at a dealership? I just got my OASIS report and noticed I have not had any of the latest flashes. I'll try that first and see how it goes.

Thanks for the info and help.