Car makes a low pitch sound starting at 30mph & getting louder as speed increases. 1999 Buick Park Avenue Ultra w/ 3.8liter.

Engine Stalling Due to Mass Air Flow/Crankshift Position ...

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Buick Park Avenue Engine Stalling Due to Mass Air Flow/Crankshift Position Sensor Failure. This is a verified ... 1997 Buick Park Avenue- 3.8L V6160,000Visitor. Engine stalls ... car runs then stalls and won't start for thirty minutes. Upvote (36).

Buick stuttering Questions & Answers - Fixya

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94 Buick Park Avenue that stutters under a light load I have a 94 Buick Park Avenuethat ... Buick Century 97 runs rough and stutters when cold and gas applie Engine runs rough ... I have a 1994 buick lesabre it starts ok but stutters and stalls.

you dont,you get inside the door to change motor

This may be related to the antitheft system The system is known for turning off the starter or injectors when it fails. Is there a light on the dash that says SECURITY? This is a common problem worth looking into. http://www.diy-gm-security.com/ & http://newrockies.com/

Sounds like catalytic converter inner material broken up inside casing. To verify, with vehicle thoroughly cooled down , raise vehicle high enough to get underneath, use jack stands for safety, and fist pound converter and listen for similar rattle.

Why would you not diagnose & repair, if necessary, the
ABS/Trac issue,seeing as how your very though on
everthing else.

Resolve the Code related issue first

Change the Power Steering Fluid & add some Lubgard
Additive,no other product to any thing on vehicle except
Lubgard in the trans ,which along with the P/S should be
changed every 3 years

Your noise is the transaxle or alternator,unless you have
some ABS Pump or HCU issues there

Check your drivers side front CV joints and make sure the dust covers aren't ripped or broken. You;ll also want to check to make sure part of your splash guard isn't rubbing against your tire.

On this website you find ruse box diagram and description for Buick Park Avenue (1997 and 1999)

Buick Park Avenue 1996 1997 fuse box diagram CARKNOWLEDGE

http://www.carknowledge.info/buick-park-avenue-1998-1999-fuse-box-diagram

sounds like power steering pump is going out or low on fluid

sounds like a wheel bearing if you don`t hear a clicking it is a bearing

does it do it in all forward gears or just overdrive?