I have a problem with my car, 3 months ago the engine started with a hesitation or stumble when reaching 2000 rpm. First, my husband did the tune up (the only thing he didn't do was changing the fuel filter, as in Autozone he was told that it was only sold together the fuel pump). We then took it to the mechanic and he changed the crankshaft sensor. Also, the check engine light was on. The mechanic says it is the timing belt, but we don't know if we should try to fix or get a new engine. A couple of weeks ago we were driving in an uphill road and the hesitation started again, do you think is's…
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