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I'm a mechanic. I get cars in all the time with drivability issues.
First question: Is the check engine light on?
Second question" What do you get for MPG?
the first can be a bunch fo stupid stuff which won't affect mileage, or it can be a BIG problem which really messes it up.
The second gives a hint. From there, the scan gauge, possibly a ride around the block with the customer driving, and I can usually figure out what is wrong
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