Hi all

As the title suggests, I've got an ongoing problem on my Mk1 Octy vRS in that moderate throttle openings tend to give erratic boost and lumpy power. At full throttle it's perfectly smooth, it's just the medium throttle openings that suffer from this problem.

I contacted mikeholroyd who is being a top bloke and doing a logging run tomorrow night for us. But I want to get some advice on what measuring blocks we need to log?

I should mention I have no actual fault codes, and check for them pretty regularly.

At the moment, aside from the usual possibility of a split hose or vac leak somewhere, I'm suspecting the following things:

- N75

- N249?

- Dodgy coil pack somewhere?

Is there anything else I should be adding to that list, and if so are there measuring blocks we can use to check for it?

Any advice very welcome, this is the first time I'll have done any logging and I'm still learning my way around these engines.

Anyone? :'(