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[TheBoy]

When it has a flat moment, it will still accelerate, but I would say at about 10% of its normal power - the engine just loses all its grunt. So I dip the clutch just until the engine idles, then get back on it again - and it storms off!!

As Marks_DTM says, defo worth checking wastegate, as that would dump all boost.  May be worth checking for holes in air intake as well.

[platty]

Its a bit tight on space down that side, but I'll have a butchers down there this weekend and see whats what.

Thanks guys

Platty

[TheBoy]

Its a bit tight on space down that side, but I'll have a butchers down there this weekend and see whats what.

Thanks guys

Platty

Easiest way to get to wastegate is from underneath

[Vulpine]

Hi Platty
Did you resolve this?
cheers
Jon

[osealy]

Mine does similar sometimes, can barely hold 60 on an incline, usualy hot weather, had been fine recently, but now oil cooler pipes & and sllushbox acting up, time for bin, I suspected (with help from here) the skinny pipe under the manifold that goes to the I couldn't be arsed looking for, as it always ran fine when I got home.

[SR-71 Blackbird]

this kinda sounds what i have somtimes with mine, where is the wastegate and what does it look like does anybody know?

[aaronjb]

The wastegate is attached to the turbo - I went looking for it earlier to take a picture for you, but came to the conclusion that you can't see it from above..

Actually, to be technical - the wastegate is inside the turbo exhaust housing, actuated by a small external lever connected to the wastegate actuator..

Here's a nice picture to explain - this isn't actually an Omega turbo as I couldn't find a decent picture:



The actuator is the part at the very bottom of the picture with two hose fittings on it, the arm running horizontally connects to the wastegate, which looks like this inside the turbo:

[Evo]

Your problem of low power which can be improved by dipping the clutch to allow the revs to first drop is identical to the problems I had on my 2.5TD.

Caused by oil/muck in the small 'rubber' tube which runs from the middle of the underside of the inlet manifold to the inlet manifold pressure sensor (a 1" cube) just above the oil dipstick. A 5 minute job to check. Suggest you do this before checking the actual turbo.

[Omegatoy]

Dunno how i missed this thread? but i would bet its EGR sticking open slightly allowing boost to take time to build up?
egr is only open on cruise so five mins at 70 would constitute a cruise? then it cant shut immediately hence lack of power?
jm2pw

[hoofing it]

I'd just like to add is code34, 64 or 81-82 showing as I had the same sort off problem with mine.
The next time your on the M-way when your cruising at 70 put your foot to the floor (its flat ) If you take your foot off the gas then hit the kick down does it stay flat or lift and go.

[Shackeng]

Note date of OP's post. Has he been back on? I doubt it.