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Q: starts and dies immediately

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Starts and dies constantly

My car has 150000 miles.
My car has an automatic transmission.

A: This may be related to many different thing...

This may be related to many different things, but suggests that there may be a fuel delivery issue such as failing injectors, low fuel pressure or a faulty idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the vehicle's computer which will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed. However, when the engine RPM drops below the normal range of 800 RPM (for most cars), it is more than likely that you are dealing with an IAC valve problem. In cases where this valve is clogged or is failing, your vehicle will stall instead of slowing to an idle after the release of the throttle. I would recommend having an expert from YourMechanic come to your home to replace your idle air control valve. Low fuel pressure will cause the injectors to fail to deliver the proper amount of fuel to the intake resulting in the engine starving for fuel upon start up to continue running.

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