Idle adjustment screw
There is no idle adjustment screw on this engine, which is normal for EFI engines. The idle is controlled by the car's computer. It does this by controlling the Idle Air Control - IAC - valve, which should be checked in your case. See here p271
http://www.turboninjas.com/camry/eg2.pdf
There is a throttle stop screw, not the same, on the throttle body, which you may be thinking of, p263. This does not directly control idle speed.
Also the A/C, if any, can affect the idle if the A/C idle-up switch has failed. If testing this switch, do so when the engine is hot, as that is when they fail. See p295
SOURCE: 94 toyota camry dies at low idle. replaced plugs,
replace the 02 sensor or the egr valve in the intake manifold needs replace or cleanout and is carboned up
SOURCE: How to remove ignition cylinder from Toyota Camry 1993
Here are step-by-step instructions for the removal and re-installation of your ignition cylinder on your Toyota. Hope this sheds some light on the subject and solves your problem. Have a great day!
CAUTIONSome
models covered by this guidemay be equipped with a Supplemental
Restraint System (SRS), which uses an air bag. Whenever working near
any of the SRS components, such as the impact sensors, the air bag
module, steering column and instrument panel, disable the SRS, as
described in .
On some vehicles, it may be necessary to remove the steering wheel and combination switch first.
To install:
SOURCE: '03 Toyota Corolla 1,4 VVT-i 4ZZ engine idle rpm
Idle is factory set and cannot be adjusted, your best bet is checking for cracked hose pipework for air intake at idle,(not at problem under exceleration and driving) Any slight upset to the air /fuel ratio will be most prevelent at idle speeds.Check hoses where the meet metal flanges on manifold intakes and any sharp bends in ppipes.Good luck
SOURCE: how do I adjust the idle on a 2000 toyota tundra
This is all controlled by a computer, you are going to need to take it to a dealer, OR you can buy a tuner that will also control idle
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