Toyota Trucks: Weird idel on '88 Toyota 4x4 EFI.

Hey guys, I've noticed a weird problem with my idleing on my Toyota
Truck. After it has warmed up, and it's in neatural, it starts to rev,
then sort of die, then rev back up, and then sort of die, then rev back up.

It doesn't seem to affect accelleration or overall performance but it is
annoying snd I'd like to diagnose it and fix it before something does
happen. Someone suggested that it might be a sensor somewhere.
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o|Cory "Shinnokxz" Hansen |o
o|http://corysplace.silius.net |o
o|'87 Honda 250X |o
o|'88 Toyota Pickup 4x4 |o
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Shinnokxz wrote:
 

Idle speed controller (ISC), throttle position sensor (TPS), or dirty
throttle body affecting the TPS would be my guesses. Clean the throttle
body first by removing it, then while it's off check the TPS for spec.
You'll need a toyota repair manual on how to check the ISC