Q: What's wrong with my car?
It sometimes hesitates to start and will sometimes puff out white smoke out of the exhaust but not often. A few times I've smelled coolant while driving but not recently. It's slow on acceleration from a stop and once cut off on the highway. It now feels like it doesn't want to accelerate after changing spark plugs. I couldn't go over 25mph before then. It is also shaky when I drive it and the coolant runs out fast. Also one day my oil was clumpy on the stick when I checked it but it hasn't done it again. Please help me, thank you.
My car has 142150 miles.
My car has an automatic transmission.
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