Mechanics out there - I need help

HJOlympian · 17-08-2009 10:12am #1

Hi - having a strange problem with the gears/accelerator of our 98 Ford Fiesta. The revs shoot up in between gear changes and when the car is put into neutral the revs shoot up again (without foot on accelerator) until I apply full pressure on the brakes. Any idea what is causing this? I've never experienced this before so I don't know if it means the clutch is going or if maybe the accelerator cable is being caught on something. I'd like to know what the most likely problem is before taking it to a garage. Hope someone can help.

17-08-2009 10:13am

Nothing to do with clutch anyway

Mr Benevolent · 17-08-2009 10:18am

Seems to be a problem with the throttle position sensor on that generation Fiesta. Could also be a software issue. There doesn't seem to be one neat fix for it.

Drummerboy08 · 17-08-2009 10:24am

Presume its a 1.3? Its a lack of electrical contact between the Harness multi-plug and the Throttle position sensor. Common fault on them.

gofaster_s13 · 17-08-2009 10:25am

Idle air stabilisation valve on the side of the inlet manifold, remove it and clean it with carb cleaner if this doesnt cure it replace it with new or good second hand unit. These are a common failure on that model fiesta.

HJOlympian · 17-08-2009 10:27am

Yeah, it's a 1.3. Thanks for all the help lads!

HJOlympian · 17-08-2009 11:03am

Drummerboy08 wrote: »

Presume its a 1.3? Its a lack of electrical contact between the Harness multi-plug and the Throttle position sensor. Common fault on them.

Any idea if it would be a costly repair?

HJOlympian · 17-08-2009 11:55am

bump!

17-08-2009 12:11pm

Bump lol, clean it yourelf with switch cleaner, if that doesn't work get the part 2nd hand.

Tefral · 17-08-2009 12:34pm

Its got to do with the air intake system.

In my focus i had the same problem, turned out to be a collapsed vaccum hose on the inlet manifold.

However the other common problem is the Idle Air Control Valve. These go in fords common enough.

Alanstrainor · 17-08-2009 12:40pm

HJOlympian wrote: »

bump!

A bump in under an hour? Do that again and i'll close the thread.

Drummerboy08 · 17-08-2009 12:58pm

HJOlympian wrote: »

Any idea if it would be a costly repair?

I dont being honest, im only involved in the sales side. I reckon if you bring it into a mechanic he'll set you right.

Muckie · 17-08-2009 2:18pm

Could be a number of reasons. Check for any cracked pipes.

Clean the trottle body and if still no joy. A diagnostic check should

tell you what fault or sensor needs replacing.

Mechanics out there - I need help

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