I have a 2008 Ford Escape with 124.000 original miles. The vehicle performs great on highway driving, but when in stop and go traffic for any length of time, it starts this hesitation. When traffic clears out, I accelerate and the maximum speed tops off at 40 mph and the tach reads 4rpm. It is very rough sounding. No check engine lights on and there are no lights blinking. If I let the Escape sit for any length of time, it starts right up and runs normally. It has been in twice for diagnostic checks with no positive outcome.
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Dirty fuel filter,fuel sensor,or pump
My old Chevy used to do this and our mechanic said I probably had water in the gas line and to use dry gas. It worked. That car lasted for a long time before the body rusted out! I miss it!
It is either a weak fuel pump or throttle sensor.
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