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Discussion Starter · #1 ·
I have a 05 1.8 petrol , just this week the engine revs at idle have increased from under 1000 rpm to just over . Also when starting from cold it will now rev to 3000 and every now and again when i stop at lights it will rev on its own to 2000rpm . Any ideas ?
 

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Auto chokes were only carb engines where the auto choke moved the throttle butterfly as well as partially closing the choke. A very notorious and problematic unit was the Ford VV unit that was fitted to the 1980's pinto engine of Cortina V and early Sierra
All fuel injection be it diesel or petrol work in the same manner by cold temperature increasing the injector pulse time. This is also increased when the engine is at idle. The only main difference is how to detect idle as the diesel doesn't have a throttle and thus can't have a throttle idle position switch
 

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Discussion Starter · #7 ·
Its either the inlet manifold or a gasket on the inlet manifold , Will find out monday when its stripped down . Great just before xmas .
 

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Hello,

Have a look at the speed idle control valve. My escort used to rev high when it was cold and revved highat the lights as well.

I took off the speed idle control valve which was held on bytwo bolts, gasket and an electrical plug. Cleaned it with WD-40 and left it to dry and then put it back on.

Worked a treat but only short term as within a couple of months it was back to it's normal self.

If this works for you, do it but buy a brand new one.

The speed idle usually bolts on to the front near the oil filterorat the back under the inlet manifold of the engine (escort).

Hope this helps
 

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musicmmonster said:
Hello,

Have a look at the speed idle control valve. My escort used to rev high when it was cold and revved highat the lights as well.

I took off the speed idle control valve which was held on bytwo bolts, gasket and an electrical plug. Cleaned it with WD-40 and left it to dry and then put it back on.


I believe thisactually refers to what is the idle air bypass valve that does get gummed up with oil fumes that are re-breathed. I found it needed something more like carb cleaner to get the one on a previous cavalier clean.

On the end of the throttle butterly shaft there ought to be another electrical switch that is held on by two screws in slightly elongated slots that allow a limited of rotational movement.the switch itself should have THREE contacts, one pair make when the throttle is shut and the another should make when the throttle is fully open
 

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Discussion Starter · #10 ·
Got car back today £413 for a inlet manifold , drove 4 miles and the same fault developed engine ticks over 1200rpm and revs to 3000rpm on start up so after 1 week in a Ford garage , £413 still doing the same . And Ford now say its a known fault with the inlet manifold ! . Back to wifes C1 (Does about 60mpg
)
 

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Stef73
If it is a known fault are the dealers able to show you the technical briefing note about it (or do we have a leak somewhere !!!!) and is it all variants of the engine or just some (CMax)

Based on that you perhaps have a case for asking some pertinent questions as to why the dealers didn't advise you before they set out on the job that it may not cure the problem
 

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Discussion Starter · #12 ·
When i asked about the fault he told me it was thought to just be autos (mines manual) , had a call from them later today saying it was now the gasket and would be fixed free of charge . I will ask about the technical briefing note when i pick it up . Will dig abit deeper when i pick it up.
 

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If it is now the gasket then did the manifolf need to be changed and if it didn;t are they going to sort something financially as to what has been done?
 

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Discussion Starter · #14 ·
Yes they changed gasket first with my manifold and it didnt cure it , so they put my old gasket back on with a new manifold ! , which worked till the engine got hot . So they are now at no cost to me are replacing the gasket with the new manifold as they disturbed (removed) my old gasket.
 

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Discussion Starter · #15 ·
Car back finally . Ford also claimed a pipe needed to be replaced . Although they claim they split the pipe when removing . They would nt comment on the know fault although it was a different person i spoke to . The total job was £413 for new manifold , bolts , gasket and a pipe .
 
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