22RE stumbling worst now...
03-23-2015, 02:41 PM
#41
No, that's the wrong way and only screws up the entire A/F ratio. It's under an aluminum plug on the top. Drill a small hole in the plug being careful not to drill too deep or you'll bury the adjust screw under it. Put a screw in the hole, wiggle out with pliers. Adjust a little at a time, more than 1 turn you have other problems. After adjustment, Put old plug or other cap in to prevent water or dirt getting in. Here's a photo showing plug removed on my truck...
03-24-2015, 03:13 PM
#43
Make sure you don't have any vacuum leaks before you do this or you'll never get a good setting!
Mark the screws slot position on the aluminum casting with a permanent marker so you have a starting reference point. You could always scratch it into the casting with a sharpened nail if you're worried about it.
Now turn the screw maybe 1/4 to 1/2 a turn and see what it wants. If the idle gets smoother you went the correct direction. If not go back to your reference point and turn it the other direction.
03-24-2015, 03:23 PM
#44
I can turn mine full rich and still pass Ca smog check. I'm pretty sure Toyota restricted how much it can be adjusted, as earlier years had much more adjustment capability. The next time I have the AFM out I'll see if I can find what they did.
03-24-2015, 04:00 PM
#46
03-24-2015, 05:31 PM
#47
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