1985 Toyota Pickup -- Idle Speed Adjustment

Sep 09, 2005 3 Replies

Hello, I'm a newbie here. Just bought my first Toyota ever, a 1985 pickup with 146K miles. The engine starts readily and pulls well. The idle is smooth, but that's the problem. The truck failed state inspection today because the idle is too high. How does one adjust the idle? I don't see any idle stop screw or idle mixture screws. All the vacuum hoses look good... no cracks, no breaks, nothing mysteriously disconnected or blocked off. Please advise.



Daniel B. Martin


Is it carbureted or EFI?

Two-barrel carburetor.

Daniel B. Martin

Daniel B Martin wrote in news:XUpUe.9575$ snipped-for-privacy@newsread2.news.atl.earthlink.net:

The idle jets themselves are immediately below the throttle plate. Depending on design, the idle passages may be on such an angle so as to place the screw slightly above the throttle plate centerline. The mixture screw of your vintage will have a plastic cap on it to prevent tampering, unless someone has priorly broken it off in order to mess things up.

Hogh idle in a carbureted vehicle is usually due to excessive fuel. You are probably running very rich.

Your best bet, especially considering how this group has become a political sinkhole, is to post your question to the group rec.autos.tech

In that group resides a poster known as Comboverfish. He is a Toyota MDT in Missouri, and an extremely knowledgeable one at that. He's even a good writer, so you may be entertained as well as informed.

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