Question about 1996 Toyota Camry

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Idles fast at stops, The problem didn't stop with a new idle speed control valve. Its a 1996 Camray v6k

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Did you disconnect negative battery cable after installing new part? If not ,do it and computer will read new part and idle should return to normal.

Posted on Feb 09, 2010

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Why does it occasionally experience complete, temporary loss of electric when coming to stop?


Sounds like the idle speed of your car is too low, then the alternator cannot produce enough voltage for any electrical devices. When idle speed is normal or much higher, power will return to normal very fast. It may be that the idle air control valve is dirty or defective.

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It likely has EFI (electronic fuel injection) and an idle air control valve that regulate idle speed. They can get gummed and fail to have a fast idle when cold, or get stuck the other way, and have a too fast idle all the or regularly take its time slowing down after you take your foot off the gas. An engine temp sensor can also cause a lingering high idle if it reports the engine as still being cold after warm up.

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Engine idle speed too fast some times. idle speed


Three things to check for:

1) High idle switch is on..*(vehicle thinks AC is running but it isn't.
You can try turning on the AC and see if the engine slows down to confirm this one.

2) Sticking or worn out Idle Air Control or IAC, You might get a check engine light with this one.....you might not if it's a mechanical failure.

3) Simplest of all. A vacuum leak. You can get the engine vacuum read while running if you go to a mechanic with a vacuum guage or an OBD 2 ecu code reader. There should be specs on what vacuum levels are normal for you car at idle.

Good luck and be careful!

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It kills when you remove your foot from the accelator fast


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1 Answer

How to adjust idle on ford falcon el 6 cylinder


wam the car up, disconnect the idle speed control valve wiring plug (idle control valve sits on top of the throttle body) then set the idle to 700rpm with the grub screw stop just above where the throttle cable fits to the throttle body. Reconnect theidle control valve and you're done. It may take a few k's driving for the ECU to relearn the new throttle stop position. The idle speed control valve is only used by the ECU to add idle speed when extra load is put onto the engine such as power steering or air con use, the base idle is set mechanically on the old falconns.

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1 Answer

My 96 toyota celica 2.2 Liter will (5SFE0) will not idle down to where its supposed to be whenever i come to a stop. It stays at about 1700 rpm. I have to step on the gas to make come down to 750 rpm where...


Probably the "idle speed controller",(the ecu is programmed with target idling speeds values to respond to different engine conditions, coolant temp, a/c on/off etc,sensors transmit signals to the ecu which controls the flow of air through the bypass of the throttle valve and adjust idle speed top target value)
however this what the manual says,
check for defective throttle linkage or cable
check idle up-up vacum switching valve
check coolant temp sensor
check throttle position sensor.
Usually if its major, then the check engine light comes on,

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2 Answers

IAC Valve Location - 1996 Jeep Grand Cherokee


The idle air control valve is located on the back of the throttle body. It has an oval electrical connector and two torx screws holding it in. Unplug the connector, remove the two screws then lightly tap the body with a soft faced mallet to loosen it from the body. 
Once you have it out and prior to installing a new valve clean the seat inside the throttle body where the idle control fits. This must be very clean! Installation is in the reverse order. 
 To save some cash, pull the valve out and clean it with throttle body cleaner, this usually fixes the problem for quite a while.
Good luck and hope this helps.

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2 Answers

1996 mercury mystique stalls when I stop a red light


I am a Ford tech (35 years) and this is the cause of the problem in about 90% of the cars I see with this problem.
Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Apr 29, 2009 | 1998 Mercury Mystique

2 Answers

Nissan Quest 2001 turns off when idle


Idle air control at base of throttle body. Passages could be plugged or idle hard stop needs adjusting.

Air Intake System Sensors Air intake system sensors include a heated resistor-type mass air flow (MAF) sensor and throttle position (TP) sensor; both supply data to the powertrain control module (PCM). The PCM also monitors engine speed.
Air Intake System Control Devices The idle air control (IAC) solenoid regulates idle speed by adjusting the amount of air allowed into the intake manifold. Adjustment is made by varying the duty cycle output by the powertrain control module (PCM). The PCM will increase the duty cycle for added mechanical or electrical loads. The IAC solenoid is combined with the fast idle control (FIC) solenoid which is turned on when the air conditioner is engaged to help compensate for the additional load. The IAC valve must be replaced as an assembly with the FIC solenoid.
Fast Idle Control (FIC) Solenoid The fast idle control (FIC) solenoid (Figure 1) compensates for idle speed change caused by the operation of the air conditioner compressor. The FIC solenoid is controlled by the FIC relay. The FIC relay is energized when the air conditioner clutch is energized and the relay allows the FIC solenoid to turn on and let an additional volume of air into the intake manifold.
Figure 1: Fast Idle Control (FIC) Solenoid
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Throttle Body (TB) The throttle body (TB) controls the amount of air that flows into the engine through a single butterfly valve. The single butterfly valve opening is determined by the accelerator pedal. The TB is cast with an air bypass channel and houses several emission-related components for the powertrain control module (PCM).
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Throttle Position Sensor (TP Sensor) The throttle position (TP) sensor responds to the accelerator pedal movement. The TP sensor is a potentiometer that transforms the throttle plate opening angle into output voltage and sends the voltage signal to the powertrain control module (PCM). In addition, the sensor detects the opening and closing speed of the throttle plate and sends the voltage signal to the PCM. Also, the TP sensor is used to determine the air intake when the mass air flow (MAF) sensor fails. This mode of operation is called Fail Safe.
The TP sensor integrates the idle (IDL) switch within the housing. The IDL switch detects when the throttle plate is closed and an idle condition occurs. The PCM is supplied with this input signal.

IDLE SPEED

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Apr 03, 2009 | 2001 Nissan Quest

1 Answer

Have a 1989 Honda Accord LX and my idle after warmed up, every time I come to a stop my car dies. I've changed plugs, set idle speed a number of times, it will run good for a few days and then it's right...


If you can keep the engine running with your foot on the gas at a stop it is likely to be the Idle control valve. Older Hondas' have 2 valves. fast idle control (which is prone to cause fast, or surging idle due to vacuum leakage) and the Idle control that takes over from the cold idle control once warmed up. They are located at the throttle butterfly assembly.

Jul 26, 2008 | 1992 Honda Accord

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