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Questions and Answers

Toyota Pickup Has Idling Problems

Q. Hi, I have a 1982 Toyota Pickup, 5- speed manual transmission, 2.4 liter 22R engine and 181,000 miles. Over the last couple days, the motor has been "hesitant" or "missing" at speed. This morning when I started the truck, the idle was high and I couldn't "kick" it down. As I proceeded down the road, however, the idle went the other direction and when I came to a stop the car motor would stop; starved for fuel.

Toyota Pickup Has Idling Problems

The only way I could keep it going was to keep feeding it fuel via the accelerator. This isn't my primary vehicle. It is more of a weekend "go to the lumber yard" vehicle.

Thank you for your time...

A. There is an anti-diesel solenoid located on the carburetor, just above the idle speed adjusting screw. The purpose of this solenoid is to shut off fuel flow at idle to prevent the engine from 'running on' or 'dieseling'.

The symptoms you describe could very well be caused by a bad anti-diesel solenoid. It shuts off the fuel flow to the idle circuit, but fuel still goes through the primary and secondary jets and the accelerator valve. That's why you can keep it running by holding the gas pedal off idle.

It's not an uncommon problem and easy to check. Just unplug the solenoid and apply battery voltage to the solenoid wire. You should hear a distinctive CLICK. If not, the solenoid is bad and needs to be replaced. It is just a matter of unscrewing the old one and installing the new one.

Just be a little careful when removing the old solenoid. There is a spring and plunger that have a mind of their own and may decide to leave home for good.

If the solenoid is good, then it's very possible the idle speed circuit is clogged. To fix that you will need to remove the carburetor top and give the inside of the carburetor a good cleaning and drying with compressed air. A can of 'air' for cleaning computers works very well for this.

Additional Information provided courtesy of AllDATA

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