is it fuel inj. if so your iac valve is bad(idle air control) MrAmazing added: The 22R-E was manufactured and offered in the states from 1983 - 1995, they were an EFI(Electronically controlled Fuel Injected) motor with a single row timing belt, Check your tension on the timing belt and as this person also said your IAC causing it.
there is an Allen screw and a nut on the throttle cable you loosen the nut and the screw and adjust it to make it idle up or down.
The racing up and down at idle is call enging loping, usually caused by a vacuum leak. It could also be caused by a sticking choke at the carb. Whatever the case may be, you will need to start by hooking up a smoke machine to find the source of the leak. Also check your coolant level. my 1991 Toyota 4x4 22re had the same race up and down idle. it was a low coolant level.
The lope or surge in a Toyota 22RE engine after replacing the head could be due to several factors, including incorrect valve timing or adjustments that affect the air-fuel mixture. If the timing is off, it can lead to poor performance during acceleration while still allowing for a smooth idle. Additionally, vacuum leaks or issues with fuel delivery could also contribute to this problem, as they may disrupt the engine's ability to respond properly under load. Checking these components is essential for resolving the issue.
About 600 RPM
Your idle control valve may cause this.It is located under the front of throttle body.It is a thermostatic control device.Water passes through and heats up thermostat and closes air passage and idles engine down.You can touch the ICV when engine is hot and it should also be hot since hot water flows through it.Sometimes a flow restriction may be the promblem, if it is not hot when engine is hot you have a flow promblem. this unit can be removed and cleaned. It also can be adjusted internally by turning a spanner nut, the more you run the nut in it slows down cold idle speed.....
My 1990 Toyota Celica Idle is too high... What seems to be the problem?
There are a number of reasons why a 1991 Toyota Corolla engine would stop running after startup. It could the idle control, an EGR leak, or low fuel pressure.Ê
The idle speed control solenoid controls the idle of the engine when the air conditioning is engaged. Since the ac pump draws down the engine idle the solenoid increase the idle when the ac is on.
fix the vacuum leak
To adjust the idle speed on a 2003 Toyota Sequoia, you typically need to start with the engine at operating temperature. Locate the idle air control (IAC) valve, which is positioned on the throttle body. Adjust the idle speed by turning the IAC adjustment screw, if applicable, while monitoring the engine's RPM with a tachometer. However, it's important to note that the idle speed is often controlled by the engine's ECU, and any adjustments should be done carefully to avoid causing engine issues.
The Injectors are clogged mine did it at 125k siting at a red light or whatever it would rev up and then down to almost 0 rpms for about half a second and then back up try runing some fuel injector cleaner threw it perhaps two tanks worth.
yes u can I've done it but i have a high idle issue if the car is in park or neutral.