Having boost or intermittent running issues, then this is the video for you!

A simple walk through some of the most common issues faced by 1.8t owners

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All listed below are the like culprits of many common issues that we run into on a daily basis.

N75 issues / symptoms : Intermittent boost issues Limp mode Worse when hot
N249 issues / Symptoms: - Power loss - Logging fault code - Cutting boost mid gear Maf / Amm issues / symptoms: - lack of power - Power fluctuation through the rev range - Logging fault code
Dv issues / symptoms - fluttering noise instead of air rush noise boost loss over boost cut logging fault

Testing:
Maf/Amm - Unplug sensor and go for drive, if improves symptoms likely to be the issue
N75 - Un plug, drive if resolves issue then likely sensor at fault
N75 - Measure voltages at plug to N75, should be 11-14v pin 1, pin 2 should be 3-5v
N75 measure Ohmic value of valve hot and cold - should be 25-35 ohms
DV- push up valve from bottom then cover top spout, when you release top spout should bang back into place, if it doesn't, likely cause.



a Boost gauge is a very quick and easy way to determine if you have an issue. Vcds or suitable Obd code reader will also show if your logging any issues and can also be used to check if sensors are working as they should be.

@Cj mechanical based in Nottingham provides a health check service in which will include code reading, pressure checking and identifying leaks, checking sensors and general running issues, He can be found on Instagram and Facebook. Prices are very reasonable & over 20 years of Vag experience. ( i take all my work to him that i dont undertake )

Please double check your part numbers as they may differ depending on modal, the details below are for a 2001 BAM 225. Part numbers are as follows: N249 - 078 906 283A N75 - 06A 906 283 F ( latest revision) DV - 06A 145 710P ( latest revision) Maf / Amm - 0 280 218 034 ( bosch)

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*Please note that all videos are as a guide on how we would approach this restoration, please take care when doing it for yourself, we take no responsibility for any work you undertake yourself*

Hope you have found this helpful; any questions drop them in the comments below.

Thanks for watching, see you next time.

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