engine stumbling or hesitating

I own a 1999 focus 1.8 zetec, for the past couple of weeks occasionally the engine starts to stumble or hesitate and also when idling i can feel the
engine fluctuating, although the rev. counter stays constant at about 750rpm, can anyone help? thanks
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the
750rpm,
On the move or when stationary??
Tim.
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Tim.. wrote:

750rpm when stationary
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the
the
750rpm,
How is it when driven? Good performance? Mpg ok?
How many miles?
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Re engine stumbling or hesitating:

Sounds like an either an ignition miss-fire or possibly a fuel injection problem.
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Vic Dura wrote:

can i use redex on a zetec engine
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