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94 Camry no high idle

I have no high idle on a 94 Toyota Camry 4cyl. There seems to be a vacuum controlled diaphragm that looks like it's supposed to extend outward and increase the idle by pressing on a cam attached to the throttle body. However when started, the diaphragm sucks inward actually moving further away from the cam that it looks like it should be pressing on. Any ideas?
ThanksGrant

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  • 362 Answers

That diaphragm has nothing to do with it, it is working as it should. The problem is the idle air control (IAC) valve located on the bottom of the throttle body, it's a common problem they can stick in one position. the remedy is to remove the throttle body, then remove the IAC valve then clean the carbon deposits from both, use a can of carbon cleaner/air intake cleaner and a brush, be sure the movable part of the valve can be pushed open the close by itself to where there is about 2 mm gap when cold.

Posted on Sep 02, 2017

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SOURCE: Idle surges after warm up and when brake pedal is pressed

1990 22re same problem surge when pedal was depressed thought it was booster or check valve still didnt fix it i even put a brand new booster on it just to make sure still no fix it finnally went away on its own for about a month now it does it just sitting at an idle with out the brake pedal depressed traced all vaccum lines no problem there and still have no clue

Posted on Feb 21, 2009

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SOURCE: 1997 Toyota Camry code P0171

ita a little black box with 5 wires plug, between air filter and throttle, but try to reset maybe was a momentany failure,disconnect the negative battery terminal few minutes

Posted on Apr 19, 2009

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SOURCE: 94 Toyota Camry has rough idle.

try chem12 spray. Clean mas, then spray into intake manofold w/engine runnign at 2k rpm. Check for oil leak in spark plug recesses causes a miss that the computer picks up and tries to balance.Did this to my car. it works

Posted on Jun 01, 2009

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The indented middle part or concaved side goes on facing front of vehicle.

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SOURCE: i need a diagram of

Hopefully this will give you the information you need. The fuse box cover should also contain that information,

images?q=tbn:and9gcrnscpkpgrtoukmb2bzqih-rkmsa_m-tuhooxucyzvx6twsrwm3eg

Posted on Apr 15, 2011

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The idle is controlled by the car's computer, so it is getting wrong signals, or its controller is faulty. This is the Idle Air Control Valve, which may need cleaning or replacing. IAC is expensive, about $150, so try cleaning first. See here p271

http://www.turboninjas.com/camry/eg2.pdf



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I have a toyota camry 1997, 4cyl. When I'm driving it idles a bit and pulling a little. When i'm stopped at a light it idles high then shuts off, sometimes it just shuts off without idling. When i try to...


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check for a small vacuum leak speciallythe lines going to the throtle have someone look at it while you seat onthe car , idle ,FOOT ON THE BRAKE ! a way to test for leaks if to spray a lil wd40 around the lines an listen if the idle gets better or worst, sometimes the reason the engine runs to rough or lean are vacumm lines that are slightly broken.

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'94 Nissan P/U 2.4 4cyl started reving high. Replaced Idle control valve-aftermarket; continues with same problem. truck idles normal for a few minutes when cold and soon as it warms up it idles high!!!! ...


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