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1999 Lincoln Navigator 5.4L Whistle Noise, Vacuu
Posted to Ford Driveability on 9/11/2009 9 Replies

Hi, thanks for taking time to read this. I have a 1999 Lincoln Navigator w/5.4 DOHC in the shop that has a very strange whistle noise coming for the engine compartment. I am 95% sure it's a vacuum leak, even though there are no lean codes or any other codes in...

Summary posted 9/14/2009

9 Replies Received (View Replies)

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car Vehicle Data

1999 Lincoln Navigator

VIN 5LMPU28A4X
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsWhistle Noise, Vacuu
OccursAlways