[35d]

Dpf gutted and coded out remaped also

Runs fine but goes into limp mode if driving flat out at high speeds. Turn engine off and on and ok again. Scanned but showed no codes.

Anyone have this issue

[Sensible_]

Maybe a bad map. Where'd you get it done?

[mistryn]

I would get the tuner to check the map again, maybe too agrressive map causing it to go into limp mode OR

the added power has put a strain on another part causing limp mode.

either way I would be going back to the tuner to look into the map

[Ajs_435d]

Mine never does that.

[Icekube]

shit remap, take it back and get them to sort it!

[35d]

The map itself other then that issue seems very good. Nice smooth power delivery rather made good figures on the dyno with a nice smooth torque curve.

I don't some data logging and you can see the boost is quite higher then it should be. The boost was raised to 2.0 bar stock being 1.95 I belive but it looks as if it's getting to 3.4 bar. 0.4 bar -/+ and it goes into limp mode however I have seen it at limp mode 0.3 +

Does seem like turbo is over spooling. For others with dpf off and remap was the map or boost adjusted to compensate for the reduced back pressure?

[dy63]

who done your map a man with a laptop?

[35d]

No the map was done by a professional who has been mapping these for many years and has a very very good reputation. I would prefer not to mention the name as I don't want to sound like I'm blaming him or his mapping skills as it could be a problem other then the map. Anyway the map will be re done soon along with a software update for the car.

[Ajs_435d]

Sounds like you've got a potential boost leak, it's over spooling because of the leak and cutting out to protect the turbo.

[35d]

Would a boost leak not effect the power of the car. It still has full power up until it goes into limp mode

[DWR]

Originally Posted by ajs_335d

Sounds like you've got a potential boost leak, it's over spooling because of the leak and cutting out to protect the turbo.

Hard to understand how a boost leak would cause overboost?

Can you graph with rpm? The reason I ask is because you said it happens at high speed, but the low pressure turbo just can't supply that pressure at high flow. When the two turbos are compounding 3.2 bar is possible.
The real issue is getting limp mode without some sort of error recording. Sounds like your tuner has blocked some errors - not best practice, IMO.

[Dan-danGT]

You know these boost logs? Are you sure your not running 2.4 Bar boost? As it starts at 1000 and all pressure sensors measure atmospheric.

My 330d runs 1.7bar boost after Dpf delete and map just for comparison

[35d]

Had car software updated and map was deleted had no limp mode but boost pressure still getting to 3.2 mbar

Had new map done, was not as powerful as old map but still has 3.2 bar boost at high rpms boot is set to 2.0 mbar

[mojo187]

I have same problem on my 335d after dpf was removed so annoying high speeds limp mode usaully around 120 does any1 know wot i shud do 😩😩😩😩😩

[tomwh85]

I was thinking of dpf delete but now I'll think again??

[35d]

I'm thinking the reduced back pressure are causing the turbo the over spool.

[mojo187]

So wot does that mean how do u fix

[Ajs_435d]

It's not been mapped properly mines been done for over a year and have no issue at high speeds even when I've logged data I've got no issues.

Boost leak could introduce compensation eg pid loop thus hit boost cut, I'm surmising tbh.

[35d]

Who mapped yours ?

Boost leak in vacum hose ?

[Jase 320d]

Dont quote me on this but going back in time

3200mbar is equal to 2.2bar of boost is it not?

Pretty sure you take 1000 off the mbar reading and divide by 1000


I know my old leon tdi standard ran 2490mbar which was 1.5bar of boost

[35d]

Yes you are right

3200 is 2.2 bar after removing atmospheric

If the map is set the boost to 2.0 why should it raise to 2.2 or above ?

[35d]

Had another map done and still same issue boost is spiking up to 3.5 mbar

Even with the stock map it spoke up to 3.3 mbar but was just under the limp mode limit

All I know is before dpf delete it never had this issue