I looked at some other posts but my problem might be unique. Getting an intermittant idle surge sometime to as high as 1,800rpm. It seems that the computer is opening the idle air controller. The diverter valve also opens when it happens. I'm thinking it's a water/sensor problem. Happened after a few rainy days. Last time it cleared up after a few dry days. It doen'st miss or stutter, just like you were pushing on the gas.

What the heck could tell the computer to go that fast? I cannot find any dampness on the plug boots, dizzy cap or any sensor connections.

Thanks for any ideas;
Beartracks

 

Humidity should not be a factor. I would do the standard check and look for vacuum leaks, bad ignition stuff, faulty EGR etc etc.

 

i had a couple of vacuum lines leaking when mine was doing the same thing