Hello

My Toy's been idling at about 1800 RPM for the past couple weeks, and I'm wondering how to adjust it. Instead of adjusting it at the throttle stop, isn't there an air bleed that I can adjust instead?

Hmm. Or.. I wonder if my TPS took a shit? Is there a way to test it?

Thanx.

There's a large flat screw head on the TB if you are facing the motor from the front it's right there on top. If your tps is out of adj it could cause a high idle if the idle contacts are open at idle, increasing timing. If it's open when you start the truck it will give you a code though. Is it intermitent problem? A quick check of your timing will tell you if that's the problem.

I'd clean the TB before adjusting it.
Might have some crud in there that's causing it to stick open.
It shouldn't all of a sudden shoot up like that.

I had the same problem on my '93 4Runner. After having a top enginr flush, timing belt replaced at the dealer it wound up being the throttle body. It idled ok at start up but after i came to a stop it idle at 1800 or above and not come back down.

Mine started do that after I Hydreed it. I took the TB off and cleaned it with Carb Cleaner and it works fine now. Did it code?:D

Well, I had a look at mine, it'll idle high until I rotate the disc (that the thottle cable is connected to) counterclockwise by hand. The plunger deal that it mates up with seems to be stuck extended. What is that anyway? It doesn't appear to have any vacuum or electrical connection. I'll try posting a picture of it later tonight.

Sounds like the "Dash Pot" is sticking. Lube it or take it off. It won't pass a smog check visual test w/o it though.

I have had two issues with the Dashpot on mine: (1) The rubber boot between the rod and the diaphram is torn - gets water in it when wheeling and then freezes. (2) The bottom vacumn valve gets water in it while wheeling and freezes. Both of these will cause the engine to idle high because the frozen water makes it hard/impossible for the diaphram to fully retract. If you will fail a visual without, could you expoxy the rod into the diaphram fully retracted?