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Car gets slower

(1990 Mercedes-Benz 300SE)
in Fuquay-Varina, NC on March 23, 2018
Car started with hesitation so I replaced fuel pump and filter and air filter.hesitation has gone away but now car slows down when you give it gas and speeds up when you let off gas
Tags: mercedes benz, 300se
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Popular Answer
on March 23, 2018
Are you saying the car's speed, mph, goes up with no throttle and slows down with throttle? Or are you referring to engine rpm?

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