hearing a clatter at high RPM but not at idle

Asked by Jun 24, 2009 at 05:58 AM about the 2008 Mercury Mariner Premier

Question type: Maintenance & Repair

At first I thought it might be the gas but once the clatter starts it does not stop until the speed is reduced. The noise tends to get louder the longer I drive it. Dealer said it was a small piece in the parking brake release--give me a break! No engine light yet. Without the engine light on will the computer pick up anything?

1 Answer

85

this sounds like a mechanical problem, it will most likely not set off a diagnostic trouble code at the PCM unless it effects some sensors there for no check engine light. Though it sounds like you may have a valve train problem, such as an incorrectly seating valve, which could be caused by worn valve guides, or worn valve springs which would float the valves causing your vacuum reading to pulse rapidly at idle, you should hook up a vacuum gauge and check.

Your Answer

Add photo

Related Questions

Search Mercury Mariner Questions

Mercury Mariner Experts

#1 2022erik
2022erik
Reputation 180
#2 Tom Demyan
Tom Demyan
Reputation 150
#3 kbro
kbro
Reputation 100
View All

Related Models For Sale

Used Ford Escape
1,391 Great Deals out of 93,563 listings starting at $1,250
Used Ford Explorer
945 Great Deals out of 72,519 listings starting at $1,000
Used Mercury Mountaineer
46 Great Deals out of 1,194 listings starting at $799
Used Chevrolet Equinox
1,113 Great Deals out of 71,554 listings starting at $1,500
Used Mazda Tribute
18 Great Deals out of 936 listings starting at $995
Used Jeep Liberty
243 Great Deals out of 7,310 listings starting at $995
Used Jeep Grand Cherokee
1,021 Great Deals out of 74,887 listings starting at $750
Used Mercury Mariner Hybrid
3 Great Deals out of 86 listings starting at $3,800
Used Honda CR-V
897 Great Deals out of 61,170 listings starting at $988
Used Toyota RAV4
740 Great Deals out of 71,773 listings starting at $1,895
Used Ford Edge
700 Great Deals out of 50,637 listings starting at $1,500
Used Ford Escape Hybrid
24 Great Deals out of 418 listings starting at $1,500
Used Honda Pilot
380 Great Deals out of 21,194 listings starting at $1,500
Used Mercury Milan
26 Great Deals out of 1,009 listings starting at $995
Used Jeep Patriot
317 Great Deals out of 25,426 listings starting at $2,500

Used Cars For Sale

2011 Mercury Mariner Premier For Sale
29 listings starting at $5,995
2010 Mercury Mariner Premier For Sale
3 Great Deals out of 63 listings starting at $4,500
2009 Mercury Mariner Premier For Sale
39 listings starting at $4,995
2008 Mercury Mariner Premier For Sale
4 Great Deals out of 60 listings starting at $3,900
2007 Mercury Mariner Premier For Sale
10 listings starting at $3,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.