Car stalls when warm and stalls when engage gear or A/C

DATHINKER

MEMBER
2006 TOYOTA CAMRY
2.4L
4 CYL
2WD
AUTOMATIC
171,568 MILES

I have been in this problem for 7 months.
Replace fuel pump.
Replace ignition coil.
Replace all the spark plug.
Clean the fuel filter.
Clean the throttle body, RPM rise for a while, then later come down to 500 to 600. Once you load A/C and gear to this idle when the car is warm car shake and stall. The car start immediately you start it. I am totally out of ideas.

7 Replies

JACOBANDNICKOLAS

MECHANIC
108,328 POSTS

Hi,

The first thing I have to ask is if you have checked for diagnostic trouble codes?

Next, have you checked for engine vacuum leaks? If not, do that. Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Also, the throttle control motor may be failing and not responding or even a poor connection. Check to make sure the plug on it is in good condition, not corroded or damaged. See pic 1.

Let me know.

Joe

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Saturday, September 5th, 2020 AT 4:38 PM

DATHINKER

MEMBER
4 POSTS

Sorry for the late reply, I have not diagnostic trouble code. I took the car to mechanic workshop, he bought out the coolant temperature sensor and some other sensor attached to the engine. He clean all the sensor then put another fuel pump, but the car won't start. Now the mechanic told me I have to change the coolant temperature sensor. I will update you to tell you what happened next. On my way to buy the sensor. I pray it will work.

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Monday, September 7th, 2020 AT 12:35 AM

JACOBANDNICKOLAS

MECHANIC
108,328 POSTS

Hi,

The coolant temperature sensor doesn't just go bad. It can cause the fuel mixture to be off if it isn't working properly, but it should at least start in a predetermined setting from the manufacturer. I question if that is going to fix it. However, anything is possible.

Let me know what happens.

Take care,
Joe

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Monday, September 7th, 2020 AT 8:01 PM

DATHINKER

MEMBER
4 POSTS

Thanks Joe, my mechanic called me on phone yesterday, said the car is working fine. So I quickly rush to the work shop, I start the car, and the car started. On my way driving the car spark plug car started misfiring. I called my mechanic, he said the spark plug are bad again, my platinum plug that is not up to 2 month. My question now is, what could be damaging my spark plug every week? Whenever I put a new spark plug my car will work fine after one week the car will start misfiring or stalling, and the idle will also below 800 when the gear is engage. Please what could be going wrong?

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Tuesday, September 8th, 2020 AT 12:01 AM

JACOBANDNICKOLAS

MECHANIC
108,328 POSTS

Hi,

Wow, that shouldn't happen. The idea that it needs new plugs every week can be a few things, but I would need to know the condition of the plugs when they are removed. For example, are the black or oil soaked? Are the wet with fuel? Do they have excessive carbon on them? Did he mention anything like that to you? Also, if he replaces them, tell him you want the old ones back so I can see them.

Do you know if it is specific to a specific cylinder all the time?

Take a look through this link. It discusses how to replace spark plugs. As you page down, it shows different spark plug conditions and what the likely cause is.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Let me know if that helps you or if you have other questions.

Take care,
joe