"Wandering" mixture screw
#1
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"Wandering" mixture screw
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?
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?
#2
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Join Date: Jul 2007
Location: LaGrange, KY
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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.
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.
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#9
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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.
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.
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