All Things Mk5 > How to Guides / Troubleshooting

turbo problems 2.0tfsi 2005 flat / no boost

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woolley2021:

Hi can someone help I'm having issues with my car 05 tfsi axx engine , the car was previously a mates who noticed the car was not running correct so instead of looking into the issue he took it to street wise bristol and had "stage 2 " revo software put on the car around 4 months ago which he says did not change the cars power! When it was mapped they ran a vag com ill try attach pics code 008567 bank 1 , system too lean off idle .. also 000256 mass air flow, supply voltage intermittent which they cleared the codes , the car has the new rev d diverter as I fitted it last week which was not needed as it already had this also new pcv by what I can see ...is there any way telling what pcv I have ? Was told it was the newer one 

The car is like driving a 2.0 naturally aspirated car no pull as you'd get from a turbo .....in lower gears 3rd or 4th going slow and put your foot down you'd hear a slight (shhhh) from the turbo but no pull ... but if driven threw the gear it's as if I'm driving a standard 2.0L focus

no lights on no codes appearing on snap on diagnosis tool 

I had the car up on ramps Saturday nothing looks out of place reved the car couldn't feel any air coming from any pipes ?? Does anyone have any suggestions it would be highly appreciated

jaye2992:
Sounds like the issue i am having with my 2006 atm :/ i have looged the boost and the max is 4psi. Waiting to change the DV and then get it to the garage if its the same. Have you looked at any boost gauges/logs?

woolley2021:
No logs yet but as for psi id say running same as you or maybe less I have a new diverter on mine :(

jaye2992:
Yea feels like not but it's registering some....I had a problem with mine where the actuator snapped when I bought it but there was no boost at all then. Need to get mine looked at but sounds similar to your problem!  Hoping a dv fixes mine. Have you tested the MAF sensor?

woolley2021:
Is there a way to test the maf ? As I don't want to start spending on things I don't need ,  Would the  maf effect the boost ?

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