Tick over drops

[Parney]

Why does my golfs tick over drop to approx 600 when I back off throttle then raise its self to 900 I have read MAF or temp sender no warning lights no juddering any help please please.

[dom]

Have you scanned for fault codes?

[Parney]

I thought it would throw engine warning if a fault happened

[MoshiMoshi]

Not necessarily. Get it scanned and more likely than not you'll find something

[dom]

I thought it would throw engine warning if a fault happened

Nope, a lot of faults don't throw up the CEL. Earlier models don't even have a CEL.

[mcgee9t2]

my guess. boost leak somewhere. let the hunt begin

[benmanc]

Mine did that with boost leak. Could hear noise from front.

[Parney]

I am going to make a mist near all pipe connections first normal make a mist with WMD 40

[northeast_gti-t]

I noticed mine doing this when i first got it so i removed the throttle body (was filthy  ) gave it a real good clean out with carb cleaner,replaced it and set the throttle position and sorted it now idles smoother and the no more revs dropping 

[dom]

I also have a slightly lumpy idle and a bit of a shudder when pulling away, I'm pretty sure it's a dirty TB or a vac leak I just haven't had any time to look for it yet