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#1
02-20-2011, 07:53 PM
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2005 BMW X5 DIESEL - LOW ON POWER
 My x5 is gone as slow as hell,, takes about 15 seconds to reach 60mph and it should do it in 8.5 seconds the car is 218 bhp and feels like its 50bhp  milage is 110,000 Miles I changed air filter,and fuel filter , disconnected maf sensor (made no difference) No dashboard lights are showing up ,,,  No Big ammount of smoke cumn off engine !  Help PLZ !! anyone got any ideas ! shouldnt be the turbo because theres no oil in the intakes and oil level is perfect !! its not burning oil 
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#3
02-20-2011, 11:48 PM
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could be a seized turbo, happened to my sons diesel Isuzu, i didnt smoke just lost power
but boy did it smoke when the new turbo was fitted, blowing all that excess diesel out of the exhaust system
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#4
02-21-2011, 04:53 AM
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Just maybe.
Just a thought, there is a small black plastic cannister on the front left side of the engine compartment check that the two hoses are properly connected as I bumped one of them off mine and it suffered the same symptoms as you describe.
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#5
02-21-2011, 06:46 AM
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+1 for checking the plastic device. It's actually the vacuum control for the turbo. Are you hearing any turbo whistle at low speed with the windows open?
 The item is above the green sticker about 1/4 way up the left side in this photograph. Mounted on the wheel arch. Is the engine revving OK when in Neutral or Park? You should hear the turbo whistle when you do that too. It's quite quiet but still audible - or should be. If the turbo isn't running then the engine won't be getting enough charge air, and will smoke.
__________________
Me: Current: 2011 E71 40D Vermilion Red/Beige Nappa Wifey: Current: 2012 R80 Countryman SDX Green/Cream Last edited by X5Sport; 02-21-2011 at 06:56 AM.
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#6
02-21-2011, 12:27 PM
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Dont sell it ,just because its down on power!Once you sorted that out ,it will do a sub 9.0 secs to 60 mph like all of them!
I Sent earlier,you a PM asking you more questions. Anyway,you say you changed the air and fuel filter,have you changed your oil breather filter kit?This is an essential part and usually overlooked but the cause of a some engine issues. Now,to the really interesting "bit"!You say you have a dump valve and you can hear it when releasing the throttle! First time I heard of anyone having one fitted in an 3.0D. Dump valves ,unlike on turbo-petrol cars ,where they are very practical on high boost cars to avoid the turbo compressor to turn anti-clockwise and break under de-accelleration,but on turbo-diesels,however,they are just there for noise and need to have a solenoid connected to your accellerator pedal, to open the dump valve. Totally hopeless on turbo-diesels and usually the cause of vac/boost problems! First thing I would do ,would be to disconnect your dump valve mechanically and electrically and see if you get your lost power back. Can you post a picture of your dump valve,please 
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#7
02-21-2011, 08:00 PM
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Dump valve makes more of a "woosh" sound....!Have the mechanic check all you vac pipes that go to solenoids,etc.Also get him to check all the pipes from turbo to intercooler to inlet manifold,for leaks.I also noticed you have a few holes in you bumper grill!I hope something hasnt hit your intercooler and holed it?Check it too.
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#9
02-22-2011, 05:50 AM
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Amazing... Finally someone with my problems as well, but mine is only when it heats up.
Powers1 has been back and fourth we my but still cannot find the issue. I have had ever sensor checked, the Turbo, the Vacuums, the MAF (even with my MAF disconnected, I got no dash errors, and no change in revs or running rough, etc like you). Also had the Engine Management software updated/reflashed without an difference. I thought my problem occured after an oil change, but 90% proven it didnt (from various people). If you get yours fixed, keep us informed as it will probably be my problem too. You can PM me with questions if you want as I have done some much testing.. This is my post: http://www.xoutpost.com/bmw-sav-foru...-when-hot.html Regards, Rob
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#10
02-22-2011, 07:22 AM
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