Question about 2010 Lincoln MKX

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2009 MKX V6 has high pitched engine whistle, expecially when it is cold. May go away when at operating temp.

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Noises can be decieving--maybe a vacuum leak or a dried belt--cud be somethin internal too or alternator issues-get a repair book or let an honest tech listen

Posted on May 23, 2011

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2010 MKX makes high pitch noise. can be heard inside and outside the car. What is it & How can I fix it?


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My 2003 Ford Explorer has a high pitched whistle around 2000 RMPs. If I accelerate or decelerate the whistle stops. I've replaced the idle aircontrol valve, as I read this could be a possible solution to...


you may have a tensioner or idler pulley starting to go bad. They make a high pitched whistle when the bearings are on thier way.

Simply have someone slowly bring it up to 2000 rpm and listen with the end of a wooden broom handle touching the center bolt on each. Be careful not to get caught.

If you're not used to this you may be able to hear it whithout use of the "hearing aid"

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Sounds like a vacume leak, chk. for a cracked or broken vacume line or maybe one came off. Does it idle ruff? With it running open hood and listen for a low pitch whistle you may have to rev it up a little.

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1 Answer

2000 chevy blazer starting issues


swng,
1) Is the service engine soon light ever on when engine is running?
2) Per your description I would look at the ECT sending unit. It sends coolant temperature information the the Engine Control Module for proper fuel delivery for cold engine start. It may have lost its calibration.
Let me know.
Regards,

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1 Answer

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check pawer steering pump belt mybe it is worn out or loose, also check the alteranator belt.

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