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Q: engine problems on 1995 Mercury Tracer

what makes chugging on acceleration, I also get very poor gas mileage
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Do you have a check engine light on?

I would suspect an air intake leak (check the hose after your air filter box to the intake - is it cracked and leaking perhaps? Check closely...fairly common on this car), a vacuum leak, something like that. You could also have a fuel pressure concern - after checking for obvious leaks, have a fuel pressure check done.
There is no check engine light on, It chugs for a bit then all of a sudden it will get up and go
The MAF sensor is the sensor on the air tube after the air filter box.

You really should not replace this part frivolously - make sure you check for the barometric pressure reading and for fuel trim codes. Otherwise, it's probably ok.
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