SLAYfriknBODIES

I have a 1993 Toyota Pickup. 22RE.

the idle had been getting rougher with the cold. It would high idle at 2100 rpm on a cold start and began surging when warm.

I adjusted the screw on the top of the throttle body and my idle was PERFECT. Cold idles never exceeded 1800 rpms for more than a few seconds.

However, coming to a stop sign or two lately the idles been chugging away at about 450 rpm. I'll stop and get out, pop the hood and adjust the screw with my handy-dandy glove box gerber multitool.

it'll be fine for a few minutes, hours or days... but it soon wanders again requiring adjustments.

What do you recommend I use? a washer? loc tite?

sdoolin

There is an O-Ring on that adjustment screw and yours is probably dry-rotted. I had the _exact_ same issues you describe after my recent rebuild. Surging idle, and constant re-adjustment of the idle screw. It'd back nearly all the way out sometimes which is what led me to understand it has an O-Ring.

I replaced the O-Ring and it is solid now. If you don't have - or can't find - an O-Ring, get it to where you like it (warm), and then smear some heavy grease around it and that will at least slow the movement. Not elegant, but will work.

sdoolin

Oh - don't Loctite it, you will regret that.

LITLRED

The o-ring comes in a gasket set...or you can get it at the dealer.

Teuf

How do you know its moving? Did you index it?

RustBucket

iTrader: (1)

I think I've got some metric o-rings that fit perfect. PM me if you're interested and I can mail you one for a small $$.

YotaWoRx

O ring for throttle air bypass screw is same as the one for a fuel injector

highonpottery

iTrader: (1)

i had the same problem with my idle screw. i could physically watch it wander when the engine was running. i didn't know about the o-ring at the time, so i just used some teflon tape from my toolbox, on the threads -- been working great for 4yrs like that.

Gamefreakgc

Yeah, the rubber gasket on the mixture screw eventually turns to stone.

Chip it all out and go to your local NAPA/Autozone whatever and ask them to find you an injector o-ring that fits right. The local NAPA did it for free for me.