Octavia vRS 1.8T issue...

[PeteG]

Right. I was driving on a dual carriageway last night, went to accelerate, and at about 2200rpm, the car judders like mad and starts slowing, and the engine management light started flashing.

I read the codes, got - "17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)

P1297 - 35-10 - - - Intermittent".

I know it's a fairly common code to have come up, so I did a quick road test today. 1st gear, it pulls through with no judders. 2nd, get to 2200rpm-ish, and it does it again - judders and loses power.

I'm going to try cleaning up the throttle body, but should I be looking for a split hose? The pipe from exhaust to the dump valve, about an inch diameter, has a small slice in it, but not right the way through - could this be making it collapse under load, perhaps?

Where else should I be looking in the engine bay?

[PeteG]

PM sent.

I've tried cleaning the throttle body out, no effect - but at least it's a- done, and b- now eliminated...

[PeteG]

Completely forgot to update this - had a boost pipe loose, new clip and some gentle persuasion got it back together. Then had to replace two coil packs in the same day. Grrr.