When i start my engine up on a cold start, it starts up and shakes, as if it is struggling and then shuts off. I'm able to start it when i put my foot on the gas. This happens a couple times a week. I Changed the spark plugs and wires thinking that was the problem but instead it continued. ALso my check engine light is also on. When i got it check at autozone...it gave me several codes from o2 sensor, to catalytic converter. This wasn't the cause previously, this started after i changed my spark plugs.
My car has 200000 miles.
My car has an automatic transmission.
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Hello. I’m not sure what is meant by saying the O2 sensor and catalytic converter problem codes were not the problem. Several component issues could cause the behavior you are seeing - from a dirty, clogged, or failing idle air control, a failing coolant temperature sensor (giving engine management a false "colder than it really is" temp signal) to a leak in the intake system or leaking injectors.
Problems with these components or the O2 sensor can be causing a "too-rich" mixture, making the engine run poorly and clogging the catalytic converter. Don’t dismiss the problem code from your Check Engine Light - they’re trying to tell you something useful. I would recommend having a certified mechanic, such as one from YourMechanic, come to your location to determine why the car is starting and dying and why exactly the Check Engine Light is on.
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