I Have 99 Grand Marquis Problem Pls Help!!

Asked by Dreadz135 Nov 16, 2017 at 03:25 PM about the 1999 Mercury Grand Marquis 4 Dr GS Sedan

Question type: Maintenance & Repair

I Have 99 Grand Marquis I Replace All The Vaccum Seals & Replace IAC
Valve Still Getting The "Moose" Noise From The Air Box...Went To Autozone
And Ran A Diagnostic They Say It's An O2 Sensor??  What Else Can Be The
Issue?

6 Answers

40,075

what air box ? did you replace an IAC valve to get rid of a moose ?

1 people found this helpful.
40,075

I don't think an O2 sensor would cause that , with many cars a code will come up but still run O.K. that's why you shouldn't take advice from someone who sells parts , is this something that was always there or did this start recently ?

The Moose Noise Wasn’t There Until I Was Relace The Vacuum Seals And The Hoses For The IAC.. And Once I Started 2 Clean The IAC Before Replacing It.. That Noise Became Unbearable Then I Replace The IAC Assuming That Wld Finally Work But Didn’t.. Now It’s Idling With The Moose And Somewhat Sputtering.. But Doesn’t Make Any Noise During Acceleration???

I Went To Several Mechanics I Know Personally They All Double Check Behind My Work.. And They Still Sent Me For A Diagnostic?? I’m Simply Asking For Alil Help..

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