Hubby needs help with a 22RE High Idle problem...... We have searched and still have not found an answer........

The truck: 1988 4runner 22RE 5-speed

whats it doing ? As soon as you start the truck it idles high and will not idle down...... After the motor is warm it still will not idle down.... Comes to a stop light and is still at a high idle.

Not sure what this could be or how to get it to stop.

We had a mechanic friend tell us that it may be an "idle control valve". Hubby searched his Chiltons manual and can not find any info on such "idle control valve".

Any help is appreciated !!

 

Anybody ??

 

Have the hubby download 1 of the online FSM's. The chiltons book for the Toyota trucks are marginal at best.

 

It does sound like the auxiliary air valve (what your friend called the "idle control valve) is not closing. That's an additional air bypass to give a higher cold idle speed. It's a thermostat-like device below the throttle plate that is supposed to close that air passage when the hot coolant hits it. The valve is an integral part of the throttle body, and if it's bad, I don't know of any way to replace it - you have to replace the whole throttle body, I think.

There's a chance it's just gummed up. Try cleaning the throttle body with an O2 sensor- and catalyst- safe throttle body cleaner, taking care not to get any on the throttle position sensor (solvents may kill it). Make sure to give several shots into the small holes in front of the throttle plate - those are your air bypasses. Get the back of the throttle plate with a toothbrush while you're at it.

After cleaning the tb and with the motor cold, screw the idle adjustment screw (on top of the throttle body) all the way in, then back it out 1 1/2 turns. Start the motor and immediately screw the idle adjustment screw all the way in. The idle speed should drop, but the motor should still run. If the motor stalls, your aav is clogged or has stuck closed.

Then back out the idle screw 1 1/2 turns again, and wait for motor to get hot. Then screw the idle adjust all the way in again. The motor should stall, or very nearly stall. If there is no difference in rpm drop between cold and hot, the aav is not functioning.

Assuming the motor runs with idle screw closed when cold, and motor stalls with idle screw closed when hot, or at least there is a difference in idle speed with screw all the way in cold vs. hot, then adjust your hot idle speed to 750 rpm with the idle screw.

If you cannot get the hot idle speed down to 750, or you have to adjust the screw almost all the way in to do it, then you likely have a vacuum leak, and you'll have to find it and fix it to get your idle speed down.

 

Adjust your idle and if you cannot get it low enough with that check that your throttle cable at the throttle body is not so tight that the throttle is always slightly open.

Rob

 

I think walker is right!!! i just had this very same problem and i took off the idle air control valve and it was clogged and the spring inside was like welded and would not move. that was after checking and replacing everything else on the motor.

I would check that first, right under neath the front of the intake not to hard to get off!

 

Thanks Yotetechers !! I will let you know what happens after he tries your ideas !!