Poorly S4...again.

[hunker7]

Have 3 inch turbo back we cat so hopefully it's not exhaust. Didn't think of the fuel pressure, but there isn't really any way of testing it is it?

[diesel des]

Same on gas and petrol?

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[hunker7]

On gas she runs like an absolute cow. Definately runs better on petrol but still feel like she's holding back, or maybe it's just me expecting too much?

[newsh]

DV? Pull the small pipe off and make sure it holds vacuum

[hunker7]

Just replaced with 007 forge piston one.

[macspring]

How old is the 710N bypass valve ?

These are considered consumable, and so it maybe worth replacing it anyway if it is old, they're not cheap but not too dear for the health of the car. Same with your under bonnet fuel filter ?

What age / mileage is your fuel pump ?

How old is the brown MFTS and also look to replace the brown plug that connects the loom to this sensor ?

Interested to see what the cure is.

Best wishes.

[hunker7]

MFTS doesn't affect running on S4s.

fuel pump I might have chnaged but I'm not 100% sure, as for 710N as above I've changed that to forge 007 DV.

[Error404]

Just replaced with 007 forge piston one.

Start your stopwatch now and see how long till that goes wrong....
Seriously though, I assume you have plumbing it in correctly and you are still running in a recirc configuration?


EDIT:

So to recap you have no codes and your are making 1.3bar boost - what makes you think there is anything wrong in the first place?
2.0 TDIs are pretty quick these days

[hunker7]

We shall see, I've replaced about 3 stock ones in past 2 years.

[Error404]

Never had an OEM 710N go wrong - what are you buying?

[hunker7]

Apparently OEM but plenty of fakes around these days I guess.

[Error404]

If you are buying off eBay then yes I’d guess at least 50% of branded parts are fake, needless to say especially the cheap ones.
Buy once, buy right.

[diesel des]

Are you measuring lambda?

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[hunker7]

Start your stopwatch now and see how long till that goes wrong....
Seriously though, I assume you have plumbing it in correctly and you are still running in a recirc configuration?


EDIT:

So to recap you have no codes and your are making 1.3bar boost - what makes you think there is anything wrong in the first place?
2.0 TDIs are pretty quick these days

More specifically it was a e60 beemer, with nearly 100hp less and about 200 less torques so I better be able to outrun that

Recirc is definately fitted correct way round double checked as I've made that mistake before.

[hunker7]

Are you measuring lambda?

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I am not unfortunately, killed my wideband by getting water on it accidentally while hot and that seemed to have killed it. I will get a new one soon.