HELP: V12TT problems with whining sound and low BOOST *video* PICS
#1
MBWorld Fanatic!
Thread Starter
HELP: V12TT problems with whining sound and low BOOST *video* PICS
My V12TT developed a whining sound coming from the left (driver's) side of the engine. It happens ONLY after letting go of the accelerator and whines down the the engine RPM's. If I floor it the whine goes away completely.
I am also having a boost problem. It doesn't feel as fast as it used to be.
Here is the video of the sound:
Can it be the diverter air valves?
I am also having a boost problem. It doesn't feel as fast as it used to be.
Here is the video of the sound:
Can it be the diverter air valves?
Last edited by benz_addict; 01-13-2014 at 09:23 PM.
#6
Super Member
#7
MBWorld Fanatic!
Thread Starter
I mean I fixed the link to the video.
Problem still persists. DEF from the front driver side
I did change the deceleration divert valve with new spring but no changes, no vacuum leaks either and no pinching lines. Whining is still there. I'm wondering if it could be the ABC pump, but why does it only whine if I build boost then let off the throttle?
Problem still persists. DEF from the front driver side
I did change the deceleration divert valve with new spring but no changes, no vacuum leaks either and no pinching lines. Whining is still there. I'm wondering if it could be the ABC pump, but why does it only whine if I build boost then let off the throttle?
Last edited by benz_addict; 01-15-2014 at 01:42 AM.
Trending Topics
#11
Super Member
#13
My '08 is making a whining noise at 2500 rpm. It happens in neutral so that eliminates the driveline. It is more pronounced on deceleration like the OP but it is downright irritating to drive on the hwy at 75 mph. I had it at the dealer yesterday for an unrelated problem that they couldn't fix so I had them take a listen to the whining. Their recommendation - "keep driving it". That's right - they know there is a whining and its irritating as hell but want me to keep driving it. I think I will just take it to another dealer