Hi, I'm new and need some assistance from you guys n gals.

I have a 2003 Focus 1.4 that doesn't seem to want to idle. It's hunting all the time and frequently when pulling up at a junction will stall.

So far, I've changed the Idle Speed Control Valve and the 3 way breather hose behing the inlet manifold as it did have a slight split in it. Also put new plugs in. Its running better than it was but still not right. There's no mass air flow sensor on mine so I can't change that. When its running, it seems fine.

Its had a diagnostic but hasn't shown any fault codes. Last year it needed a new cat and o2 sensor (engine light came on).

Any suggestions on what to look for next??

Cheers in advance.