01-26-2024, 09:59 PM | #1 |
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Squealing noise underneath the car
2015 435x GC, making this squealing noise from under the car.
I've changed the belt tensioner pulley and bearing, removed Dinan intake and Dinan tuner. Today I replaced the Engine Block Breather Valve (PCV), used 1 minute gasket to seal it. The noise is coming near the exhaust/cat/transfer case.. when i pull the engine oil cap it stops, car rough idles, then resumes when cap back on. engine throws a code P0171 system too lean bank 1. been chasing my tail. View post on imgur.com View post on imgur.com has anyone had similar experience? Any help would be tremendous! |
01-27-2024, 02:59 PM | #2 |
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You mean you replaced the PCV part on the VC that isnt technically supposed to be replaced? Did you have the noise before that? Usually that squealing is a VC/PCV issue when it goes away when you remove the oil cap
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