High Idle

[Boddney]

Hi everyone, long time no speak.
I'm after some advice please.
My poor little Roxie hasn't had much use over the last few years but last summer on a rare run out she burst her radiator. No overheat or anything that bad.
I got a new one and fitted it but ever since she's had a high idle.
I know this is due to air in the system but I just can't seem to get it out. I've followed Jimi's 'how to' on how to bleed over and over but the idle just won't sit properly.
I've changed the coolant in the past and used the same method and it's always been fine.
Is there anything else it could be or that I'm missing?
Thanks,
Bod

[PW@Woodsport]

It's not necessarily air in the system, if you are 100% sure it has no air in the coolant then it is more likely to be a seized waxstat cold idle valve.

You can diagnose this by blocking off the 5p sized hole inside the throttle body with your finger while the engine is running, if it stalls or drops right down to low revs then your waxstat bypass valve is stuck open slightly.

There is no fix, apart from a replacement unit or fit one of my excellent manual choke kits

[Boddney]

Ok thanks Paul I'll try that tomorrow. Nice sales work by the way👌

[PW@Woodsport]

You're welcome, notice I said "fit" not "buy", so not technically a sales pitch , I'm sure I have an old choke kit you can have if it came to that.

[Boddney]

What a top bloke. I didn't have time today to try it so I'll try and fit it in over the weekend.
Cheers,
Bod

[Tiamat]

The choke kit is really good, I have one on my car. Its only ever on for about 30 seconds, because once you're driving its no longer needed, am sure over the years it has reduced my fuel use.

[Boddney]

I still haven't had time to look at it yet. I'll get there I promise!