MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: antonis42 on February 16, 2011, 11:26:29 am
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k04 upgrade on 2.0TFSI AXX gone bad
http://etuners.gr/index.php?s=12&t=220 (http://etuners.gr/index.php?s=12&t=220)
tuners claim culprit was N75 valve.
english version here: http://etuners.gr/en/index.php?s=12&t=220 (http://etuners.gr/en/index.php?s=12&t=220)
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k04 upgrade on 2.0TFSI AXX gone bad
http://etuners.gr/index.php?s=12&t=220 (http://etuners.gr/index.php?s=12&t=220)
tuners claim culprit was N75 valve.
english version here: http://etuners.gr/en/index.php?s=12&t=220 (http://etuners.gr/en/index.php?s=12&t=220)
Interesting read! I also like the way these guys go forensic on a problem like CSI Athens :happy2:
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ouch... such a simple thing leads to such catastrophe! :scared:
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^^^^
Scary! :scared:
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one word (oops) i bet the guy who fitted the turbo got told off :fighting:
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Something doesnt quite sit right here......
The thing i find hard to believe tho is that the ecu didnt cut the engine once max boost was exceeded.
Also doesnt the N75 just stop boost from hitting the standard wastegate, ie if the N75 fails then the spring on the wastegate will just open at the 0.6 bar or whatever its set to ?
Sounds more like a stuck wastgate to me or a dodgy map?
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I had a dodgy N75 once on a 1.8T - just kept causing limp mode. Maybe its different when its working but broken off rather than just not working correctly. Expensive mistake though.
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Yeah very.
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good read, interesting on what they say about tampering with the wastegate..
i fitted for the forge ko4 actuator on mine and it must have been done up to tite as I was seeing boost hit 28-30psi and higher which eventually ended in this
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fu347%2Fjnewby99%2Fd849c550.jpg&hash=7bc4b86900f165228d1c554df4cdc76423724bbe)
was fooking quick though :innocent:
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Very interesting read. :happy2:
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was fooking quick though :innocent:
:laugh:
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good read, interesting on what they say about tampering with the wastegate..
i fitted for the forge ko4 actuator on mine and it must have been done up to tite as I was seeing boost hit 28-30psi and higher which eventually ended in this
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fu347%2Fjnewby99%2Fd849c550.jpg&hash=7bc4b86900f165228d1c554df4cdc76423724bbe)
was fooking quick though :innocent:
Ouch that don't look good.
Bet it was quick though :driver:
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Yeah, the first thing I thought of was a stuck actuator and my thoughts went to Hurdy and others with the Forge product. Most folks seem to have set them up carefully and sensibly though. This is the first I have heard where damage was done...nice boost levels though :laugh:
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Must be a SW fault rather than N75 fault IMO
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Yeah, the first thing I thought of was a stuck actuator and my thoughts went to Hurdy and others with the Forge product. Most folks seem to have set them up carefully and sensibly though. This is the first I have heard where damage was done...nice boost levels though :laugh:
Took a while to get mine set up correctly at Statllers, but although it took some time I wanted it right. Literally a single turn either way on the actuator thread with the locking nut can give poor boost or too much. :happy2:
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thank god i replaced my n75 valve when i did the cam follower!
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no mention of what boost the map was requesting then?? "very aggressive spark settings" tho.
i'm also with the view that should the N75 fail it can only run WG Actuator pressure...and hence won't do any damage. I mean N75 can easily fail on a standard road car. Are they saying that one small item failing can cause the car to run max boost of the turbo with no ECU control?
that'ss complete BS i think. There's the MAP sensor for starters..and the ECU still has the DV to use to relieve boost pressure should it exceed the requested level. and hence the ECU will always have control unless there is a catastrophic failure of multiple control components in one go.
It's the easy way out. The map is never at fault is it (like on testing accidentally whacking boost upto 2+ bar or something)
but who knows.