I have just cleaned out the breathers, throttle and IVC on my 2.0DOHC.
The small breather port into the throttle was solid as predicted by others on here, but is now clear. Otherwise I gave everything a good clean up
- throttle body, ICV, hoses - except the small bore hose which I have replaced.
The main reason for doing this was to improve idleing, but now instead of occassional stalling I'm getting a dramatic 'hunting' effect. When under no throttle - idle or overrun - the revs are moving between about 1500 and 2000 rpm. I've checked all connections (I think) and all looks fine.
More specifically the first time I started it up it ran fine - I let it idle for 10 minutes on the driveway and all ok.
Then put it back in the garage and this problem started happening.
Then took it for a run in the blind hope it might sort itself out. 30 mins or so later it is still doing it - most but not all the time. I get the impression that when its a bit hot (needle rises when I'm in traffic - always has) the problem is less.
No orange light.
I'm wondering if something is sticking (butterfly or ICV?) as a result of my clean up, or if clearing the small port has provoked this (I could always block the pipe to simulate recreating the blocked port).
Appreciate any suggestions...
Cheers,
Ian