Wobbly Mundano idle

[Ratdat]

I had to find Fatha Ratdat some badermatic wheels in a hurry a couple of weeks ago after the trusty Bader Bluebird finally keeled over due to neglect. As I had precisely one day to find him a cheap car I ended up buying a reasonably low mileage X plated Mondeo which is fairly tidy and seems to drive okay but it's got an idle that wavers up and down constantly. Any Ford pervs here know what's up with it? Something simple hopefully as I really can't be arsed to start learning all about Mondeos. Oh, it's a 2.0l Zetec auto BTW.

 

Also... anyone got a towbar to fit it going spare?

[Bren]

Throttle position sensor?

 

M-I-L granada did same thing - erratic idle and engine "hunts."

[mrbenn]

I'd clean the idle valve as a matter of course then have a look for vacuum leaks.

 

I've found this site useful:

 

http://www.gomog.com/allmorgan/ZetecIdleIssue.htm

 

EDIT: Might be worth trying a battery disconnect too, this resets the idle values.

[Stixy]

Check the breather and vac pipes  at the coil end of the manifold  there is a T piece which breaks and causes air leaks and idle problems 

 

If your lucky that will be the problem  but if not look at the idle speed control valve  best viewed from underneath on the inlet manifold above the n/s driveshaft 

 Cleaning them somtimes works    but they are cheap enough new 

 

http://www.ebay.co.uk/itm/IDLE-SPEED-CONTROL-VALVE-FIESTA-ESCORT-KA-MONDEO-SQUARE-/290900704092?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43bb087b5c

 

also have a look in the throttle flap housing  these can gum up and cause problems 

[Mike D]

My old boys had a vac leak on one of the little hoses round the inlet manifold that caused the same issue

[trigger]

My old 1.6i Zetec Escort used to do that, it was the idle speed control valve on the air filter box pipework IIRC.

[fordperv]

My first port of call would definately be the iscv and checking for vacuum leaks

[Ratdat]

Cheers folks, plenty to look at there. I'll get him to pop it over one day next week and I'll have a poke about at it.