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What would cause sputtering and hesitation for a cold engine?

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2011-11-15 18:41:30
2011-11-15 18:41:30

Well, a variety of things would cause sputtering and hesitation. When the engine is cold, the thickness of oil is greatly increased, and may not make it all the way up to the top of the valves and that would make the engine rumble and die. Colder temperatures also would make a throttle stick, causing hesitation. Your choke may be sticky. Maybe your temperature sensor is off, and is registering the 'cold' temp colder than it actually is. At any rate, plan an extra minute or two and LET YOUR CAR WARM UP before you drive it. And remember, everyone else on the road has had their cars sputter, hesitate, and die in traffic. It happens when its cold out.

If it is a new enough Toyota the fuel injectors take a while to warm up and often does that in my truck don't worry about it but let it warm up like five minutes or so before going over twenty-five or so.

My experience with a '98 Tacoma 4 cylinder: the mass air sensor was dirty. Twice.

It is just downstream of the air cleaner. First time a small tear in the air filter allowed dirt in. Second time a tiny bit of hair, probably off my shirt, when I changed the filter.

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