L494 3.0 Help needed

[TheHighlander]

As above, if my Focus RS exploding was not enough to tip me
Over the edge, the wife s RS is playing up.

2016 Sport 3.0 Diesel

It s had the EGR software delete and a stage one map for 20k or so

Drivers side inlet cover changed last year.

Other than that all good.

So restricted performance came on and I ve notice ld it s boosts fine to 3k rpm or thereabouts then gets sluggish and a bit juddering boosting.

Code - P0299-77 under boost

Tonight I did a smoke test and it s got a slight leak at the EGR actuator rod where it goes into the EGR.

The map sensor was a bit clogged so cleaned that, throttle body flap all good.

Cleared codes - Initially it will boost perfect the after it does it once it then does the same after 3k rpm so no boost.

I know the secondary turbo comes in at 2800/3k rpm so I m leaning towards a stuck actuator, I wouldn t go to say turbo failure as no smoke, blue smoke etc etc but I m no expert.

Next up I think would be to check the turbo actuator on the secondary turbo.

But open to all ideas

[mike_e]

We have this error on our diesel from time to time, usually during quick acceleration. Ignition off/on usually clears it otherwise I plug in the box and clear the codes. I was speaking to a local specialist about it during a recent brake pad change, his money was on the actuator having seen this issue many times. I think you're on the right track with your thinking.