Fiesta HCS1.3 Engine Cutting out/misfiring

In message , Tony Benham writes

The Idle Control Valve (ICV) needs removing and cleaning out with a solvent. It's only held on by two bolts and is an easy job.

Either Pauls suggestion or the brake servo/pipe to brake servo is leaking.

Air leak- a joint / hose, or the brake servo pipe is split.

Tim..

The CFi doesnt have an ICV, it just uses a stepper motor on the throttle linkage- there is no idle air bypass.

Tim..

I'm not typing it out again - someone else tell him :)

Si

The message from "Mungo \"two sheds\" Toadfoot" contains these words:

How hard is it to type "It's a Fiesta"?

What's your point ? The Fiesta has always been a little temperamental, but it has recently become much worse so I guess there is a particular problem causing this, which is why I asked. Tony

Hi Tim, ISTR that this is correct for my wife's car. I'll check tonight, but couldn't the stepper motor be playing up too ? I'll check your other suggestion re brake servo hose as well. BTW the sticking idle control valve is a classic problem on my vauxhall car's ecotec engine, I have to clean that fairly often. Thanks Tony

words:

very true, usually found on roadside dead!....

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-- Kind Regards Neil B Orange CS - +447837614753 Live Life in the Fast Lane -

Sorry, I didn't mean to sound sarky, it's just that my neighbour's Fiesta did the exact same thing and every time someone posts identical symptoms (and there's been a LOT of you) I type out the same cure but nobody has ever come back to say it worked :o)

So.....under the air filter are three (IIRC) connector plugs. The pins and sockets of these connectors corrode and cover themselves with grey gunk so they stop the letrics from getting where they're going. Undo these plugs one at a time and give each half a good clean with WD40, or similar, and cotton buds/kitchen towel. Plug back together, start engine, look to the skies and thank all the gods for URCM.

Si