All Things Mk5 > How to Guides / Troubleshooting
BKD Turbo Removal
Stupots:
The plan was to do the turbo this year when the weather warmed up, but it's getting colder again, so not sure it will get done this year now. I just need to book a few days off and get on with it (Clutch and timing belt at the same time). It's been in the loft for 3 years now.
I have other bits in my shed waiting to go on... Front and rear optical parking sensors, Highline reverse camera, Heated seats wiring loom... as well as some other bits and service parts that need doing.
This week I've tried to get some stuff done, but the interior is in bits at the mo as I'm wiring up the dashcam (that's been on the screen but not powered for 2 years), Passive TPMS, Air Quality Sensor, Passat (Mk7 style) Climatronic Controls and the single motor recirculation flap to go with it and a USB socket (where the ESP buttons etc go). I was going to write a guide on the flap swap, but it's been a right PITA so I don't think I'll bother.
Hopefully it will all work when I finish tomorrow...
kevster996:
Blimey - thats a long list! Hope you get a chance to do some before it gets too cold - I dont have a garage only a car port so try not to do big jobs in the winter.
I had my car checked out at a local vw specialist - they confirmed that the turbo is fine and checked everything over - vacuum lines ok and the vacuum solenoid, actuator length etc. Its still overboosting with P0234 error code and they said that the air readings are way too high which is resulting in too much fuel being pumped through so MOT will still be a fail. The MAF is new and a Bosch one so they said thats fine.
As its been remapped before but I have no history I think the EGR delete has upset the ECU and whats been remapped. Im going to get it put back to standard but with a software EGR delete next week by a mobile specialist remapper. Hopefully that will sort the overboost and the limp mode/error code.
kevster996:
Still no joy. Ive had the car mapped back to stock with an EGR delete - so basically paid someone to detune it and still not fixed the issue :thinking:
I cleaned up the boost pressure sensor and checked the earth leads and tightened up a couple of the intercooler pipes. Also checked the exhaust for leaks but that looks ok. Im really at a complete loss now as to whats causing the issue. Getting overboost and air flow readings too high so it pumps too much fuel in - I get some smoke when I rev it up so it wont pass the MOT...
confused.com
kevster996:
New recon turbo on now and still get limp mode - same as before... Completely stumped now...
Stupots:
Hi @kevster996 how frustrating... don't loose hope! The only thing I can think it could still be is a faulty Vacuum Solenoid Block (or vacuum pipe leak). Anyone close by that would be happy for you to swap that out to save you buying an unknown good 2nd hand part?
Not read back through the thread but have you had a VCDS scan yet?
Cheers
Stu
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