Question about 1984 Toyota Tercel

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1984 Toyota tercel wagon

Hello

I have a 1984 tercel wagon 2wd with a 1.5 carburated.

I have always had problems with the idle running rough, bouncing around, and having it stall at idle

The carburator was rebuilt in october 2004, and again in november 2007.
it probably was run for 10k to 15K miles between the two rebuilds.

Car idle is hard to get to set via gas pedal, and only seems to set while the car is cold.

when the car gets warm , the idle meanders, and it will stall at Idle

Help :O

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Although this isn"t a proper fix, and may affect emissions, I ran accross this problem on a friend's 87 2wd wagon.

There is a dashpot that controls a lever the Idle set screw is on, I am guessing it is a decel valve that closes butterfly when coasting in gear. I never looked at a manual to figure out what controls the vacuum valve that is on the passenger side of the engine compartment, but if you disconect the vacuum line and plug it that lever will not back off and idle will remain where you set it with the adjustment screw.

Make sure the engine is warmed up and not on a fast idle cam before adjusting idle.

The car is a 5 speed, I not sure if automatic cars are the same.

The car idles fine now and still run's great and gets 37+ MPG with 240000 miles!

If you want to fix it properly you would have to diagnose why that dashpot is being actuated at idle

Posted on Dec 16, 2008

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Posted on Jan 02, 2017

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