zeteclaad

Hi all, new to the site and have problem with the new motor. I have a very strange idling problem, it starts up at 1100rpm and when warm its at 1300rpm. when I drive its normal and nor chucking or no bad throttle response when I clutch it will rev up to 2700rpm and release the clutch it stays there when braking till I come to a complete stop it goes back to 1300rpm? I have cleaned the throttle befor this which may of cause it as I know now your not suppose to clean a throttle but I have changed the throttle to a new one and been careful with it. also new TPS gone in aswell but problem still the same

I was woundering if anybody have any ideas and if so thanks.

aaron

Ginge

Have you changed the ICV or cleaned it... does it even have one... you give no mention of car/age/engine...

Ginge

zeteclaad

no don't think it has one or just cant see it, its 00 ford fiesta zetec s 1.6

zeteclaad

could it be vacuum house leak?

STeve

iTrader: (11)

zetecs are common for this and as ginge mentioned the icv can cause this as well as a vacuum air leak or blocked crankcase breather etc even the maf

Bailes1992

Yes you have an idle speed control valve which is the likely fault.
They also have a breather hose which is common to split, it's a T piece located under the inlet manifold.

zeteclaad

ill have look at that now are new ISCV pricey ?

gcfcos

Check the speed sensor on gearbox. Easiest way to check is to unplug it and try driving it and see what happens. Ford ka and fiestas suffer bad with this fault

gcfcos

The speed sensor fault normally causes it to rev up with the clutch depressed but still rolling and the engine still revving as if u were doing that speed and when u stop the engine goes back to idle

Cossie.jack

I was going to suggest spit vacuum pipe but I don't know much
My dads evo was idling at 2500rpm awhile ago. Found a spilt pipe and change it and its been fine ever since.

zippyobrien

iTrader: (2)

Power steering pressure switch.

zeteclaad

were abouts is the speed sensor located ??

GVK.

On the gearbox.

Above where the drivers side driveshaft goes into the 'box.

3 pin electrical connector.

Also have a look at the clutch pedal, should have a switch on it, make sure its connected.

gcfcos

It's on top of the gearbox. Some of them have the speedo cable going into a unit which has a plug on it which sends a signal to the ECu and the cable runs the speedo dial where as some are just electronically controlled to ECu and speedo (no cable) if it has the speedo cable going into the speed sensor unit u can unplug the electrical plug and the speedo cable will keep the speedo dial working

gcfcos

I've had loadsa ford kas and fiestas and escorts do this (used to work at ford main dealer) at one point we had one a week coming in with this fault where independent garages had fitted throttle position sensors, idle air control valves and goodness knows what else and 50% of the time it was the gearbox speed sensor and the other 50% it was the ECu at fault :-( hope that helps