'89 22RE - Choke / Idle problem

Sep 14, 2004 3 Replies
J

Doing some routine maintenance, (lubing, changing fluids, etc.), I decided to pull my plugs out, check them and clean them (re-gap 2 of them), checking the cap and sand the rotor contact. I also noticed the O2 sensor was loose and tightened it.



I have no tach, but I know how my engine sounds. Since doing the maintenance, when I start the truck, it starts out at a normal idle (not choked), then after it warms up it climbs to about halfway between a normal idle and a choked idle. Could this have to do with the O2 sensor? What would you do next?



Thanks.


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D

I, like you, would suspect the O2 sensor as none of the other maintence would cause a high idle. I'm not sure but you might be able to get an O2 checked at a parts store, possibly Autozone. Dave

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G

I have an '85 4runner with the 22RE, 375,000KM.. when the O2 sensor acted up the engine check light would come on, no other symptoms. There is a engine check light decoder plug under the hood, 1/2 way along the left fender. Plug in a shorting wire and then watch the light flash the error code the manual gives the meaning of the flash code. I would remove the sensor and wire brush it clean and it would be ok for 6 months. Then if I drove over 3000rpm for a few KM, it would light up again, go out when I backed down. Finally changed it and been ok for 3 years. I had similiar idle speed problems and I solved that by doing the engine idle / throttle position sensor adjustments. It took me a couple tries to really get it right, you need an ohm meter and it is a delicate adjustment. Normal wear will alter the setting. Could be this, but my O2 sensor didn't affect the idle as you describe it. regards.

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