97 Fiesta Zetec timing or accelerator problem??

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MD343 - 20 Mar 2006 14:32 GMT

Hi

Idling speed has jumped to 1200-1500rpm from usual 850-900rpm

Car feels as if something is wrong with engine speed.

DRiving along if I engage neutral rev counter gives high revs reading
2.5/3000 rpm and engine feels as if it is running at that too even in
neutral.

What could be possible causes to make it seem stuck like this?

thanks

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Backyard Mechanic - 20 Mar 2006 14:56 GMT

> Hi
>
[quoted text clipped - 7 lines]
>
> What could be possible causes to make it seem stuck like this?

Is the engine warning light on? Find a way to get the codes read out from
the engine control system.

It's usually either a vacuum leak or a bad Idle Air Control or a bad
Throttle position sensor.

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