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Keeps stalling randomly. ususally starts again right away

Customer Question
but sometimes takes several minutes...
keeps stalling randomly. ususally starts again right away but sometimes takes several minutes. Stalls at idle. making a turn...
JA: Is the check engine light on? Does the car stall at idle or when driving?
Customer: no
JA: What is the model/year of your Toyota?
Customer: Stalls at idle or very slow speed. 1995 Camry LE 4cyl
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Fuel filter, coolant temp sensor. Just bought 4days ago. Fine first few days
JA: Anything else you think the mechanic should know?
Customer: Runs fine otherwise
Submitted: 1 year ago.Category: Toyota
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Answered in 12 minutes by:
7/15/2016
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 1 year ago
Ted Ritter
Ted Ritter, Toyota Master Tech
Category: Toyota
Satisfied Customers: 4,521
Experience: Toyota Master Tech, ASE Certified
Verified

Thanks for posting

There is a common problem on these engines for stalling/ hard starting, the idle air control (IAC) valve, it's located on the bottom of the throttle body, the recommendation is to remove te throttle body, then remove the valve and clean it using an air intake cleaner/carbon remover, at the same time the inside of the throttle body should be cleaned using the same cleaning agent and a brush to remove the carbon deposits, if the IAC valve is not serviceable, is stuck and can't be freed up I will need to be replaced for best results.

lease reply if there are any questions or concerns, if not please take a moment to rate this service. Thank you.

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Customer reply replied 1 year ago
It's not that. Idles fine, just randomly stalls at idle and slow speed.
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 1 year ago

Thanks for the reply,

What I recommended doing was to fix the "stalls at idle and slow speed" concern​ .

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Customer reply replied 1 year ago
That's what I said both times. Please cancel
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 1 year ago

I recommended to clean the IAC valve and the throttle body to fix this. Im sorry but I don't understand your last reply. I have nothing else, maybe someone else has a better answer for you.

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Toyota Mechanic: Matt, Mechanical Engineer replied 1 year ago
Matt
Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 22,444
Experience: BEng, Repaired my own cars and others for 20 years, worked in Formula 1 for 10 years
Verified

hi

another tech here do you still want an answer?

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Customer reply replied 1 year ago
Sure
Toyota Mechanic: Matt, Mechanical Engineer replied 1 year ago

Ok

if the engine keeps stalling out at idle then it could be an airleak after the airflow meter, any air dragged in here isn't 'seen' by the ECU and so not compensated for and can lean the engine out then causing rough running.

As its a mechanical fault it tends not to turn on the fault light and you can sometimes hear a 'hissing' noise with the engine running.

Check the hose clips for tightness and inspect the trunking for any cracks or splits and also all the vacuum system, the small bore pipes and fittings for cracks and missing parts.

The best way to locate a leak is to have the engine running and warm and then spray lighter gas /propane around each joint in turn. If the engine rev's up you've found your leak.

Now you might think that spraying lighter gas around a hot engine isn’t wise, however the flash /ignition point of gas is about 400°C so you need a naked flame or spark to set it off and I’ve used this method for many years without incident.

Work your way through each possible joint one at a time and you should find it. I use a slightly flattenedpiece of brake pipe and some rubber hose from the can of lighter gas to provide a spraying 'wand' and allow a direct blast of gas into each area, especially those difficult to reach with large implements.

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Customer reply replied 1 year ago
Actually it will run fine and even idle without a problem for a day, an evening, then suddenly stop running. Usually starts up immediately or sometimes several minutes. Often does it a few times then back to normal.
Toyota Mechanic: Matt, Mechanical Engineer replied 1 year ago

Hello

OK that still fits as air leaks are very temperature dependent as gaps can open or close up as things expand with heat, so the weather and engine temperature can effect them. so they can come and go depending on how hot things are under the hood

This leads them to be quite intermittent in the case of mild leaks

its also worth cleaning the airflow meter by removing it from the car and spraying the exposed sensor wires inside the tube with a brake or switch cleaner - ensure that the cleaner is one of the old fashioned, non Eco type that does not leave a residue

On no account touch the sensor wires with anything physical as they are extremely fragile

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Toyota Mechanic: Matt, Mechanical Engineer replied 1 year ago

Hi

do you still need help?

Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you

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Matt
Matt
Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 22,444
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Experience: BEng, Repaired my own cars and others for 20 years, worked in Formula 1 for 10 years

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