johnski Posted July 25 Share Posted July 25 So the noise is on when light throttle, if giving it some beans it will go away and eventually come back, when there is no noise is drives fine, when the noise is there is clearly down on power There are no codes, if i unplug the MAF there sound is gone and it drives perfect (but throws up a code), ive tried another MAF and its the same result, if i unplug the wastegate actuator the sound is gone but down on power and again throws up a code The noise is coming from the back of the engine, around the middle where the turbo is I've uploaded a quick clip of the noise HnVideoEditor_2024_07_25_195842386.mp4 Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted July 25 Share Posted July 25 7 minutes ago, johnski said: So the noise is on when light throttle, if giving it some beans it will go away and eventually come back, when there is no noise is drives fine, when the noise is there is clearly down on power There are no codes, if i unplug the MAF there sound is gone and it drives perfect (but throws up a code), ive tried another MAF and its the same result, if i unplug the wastegate actuator the sound is gone but down on power and again throws up a code The noise is coming from the back of the engine, around the middle where the turbo is I've uploaded a quick clip of the noise HnVideoEditor_2024_07_25_195842386.mp4 Hi it sounds like it may be a boost leak on one of the Turbo hoses, have a good look at them for oily residue it only takes a tiny hole to loose pressure and it whistles or hisses. 1 Quote Link to comment Share on other sites More sharing options...
johnski Posted July 25 Author Share Posted July 25 Thanks Would it still be a leak if it runs fine with the MAF unplugged? Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted July 25 Share Posted July 25 1 minute ago, johnski said: Thanks Would it still be a leak if it runs fine with the MAF unplugged? Hi probably, as the unplugged MAFF would be in default strategy as its not able to measure the airflow and the ECU would limit the amount of air coming in and form its own triage for combustion based on the info from the MAP and the air temp sensor in the throttle/ manifold housing, I am assuming its diesel. Steve. Quote Link to comment Share on other sites More sharing options...
johnski Posted July 25 Author Share Posted July 25 1 minute ago, Stevey Y said: Hi probably, as the unplugged MAFF would be in default strategy as its not able to measure the airflow and the ECU would limit the amount of air coming in and form its own triage for combustion based on the info from the MAP and the air temp sensor in the throttle/ manifold housing, I am assuming its diesel. Steve. Yeah sorry I forgot to mention its a 2.0 TDI CFFB Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted July 25 Share Posted July 25 2 minutes ago, johnski said: Yeah sorry I forgot to mention its a 2.0 TDI CFFB Hi as I said its with checking the turbo hoses, its most likely one of the ones from the turbo to the intercooler or the other side of the intercooler were it goes to the throttle body then are the hoses that get most of the cr@p from the PCV valve. Steve. 1 Quote Link to comment Share on other sites More sharing options...
johnski Posted July 26 Author Share Posted July 26 so went out with my little smoke machine and got a least on the bottom hose at the turbo, it wasn't loose but there should be 2 torx bolts and i only have 1, removed it and it looks like I'm missing the o-ring/seal that goes inside, I am assuming there is a seal meant to be there as it does have a groove for 1. Anyone know what that would be called and if its available on it own? Pics attached Thanks Quote Link to comment Share on other sites More sharing options...
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