hearing a clatter at high RPM but not at idle

Kims302
0

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

Mike Sota
75

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 160
#2 Tom Demyan
Tom Demyan
Reputation 130
#3 kbro
kbro
Reputation 90
View All

Related Models For Sale

Used Ford Escape"
1,486 Great Deals out of 96,221 listings starting at $1,495
Used Mercury Mountaineer"
34 Great Deals out of 1,410 listings starting at $2,000
Used Ford Explorer"
1,128 Great Deals out of 53,653 listings starting at $900
Used Mazda Tribute"
22 Great Deals out of 1,133 listings starting at $2,000
Used Chevrolet Equinox"
1,153 Great Deals out of 55,152 listings starting at $1,988
Used Jeep Liberty"
319 Great Deals out of 8,880 listings starting at $1,250
Used Jeep Grand Cherokee"
1,376 Great Deals out of 69,411 listings starting at $1,500
Used Mercury Mariner Hybrid"
3 Great Deals out of 94 listings starting at $4,500
Used Ford Edge"
741 Great Deals out of 44,280 listings starting at $3,990
Used Honda CR-V"
898 Great Deals out of 77,887 listings starting at $1,300
Used Mercury Milan"
27 Great Deals out of 1,117 listings starting at $2,995
Used Jeep Patriot"
423 Great Deals out of 34,059 listings starting at $2,995
Used Toyota Highlander"
549 Great Deals out of 20,487 listings starting at $2,981
Used Ford Escape Hybrid"
29 Great Deals out of 516 listings starting at $3,650
Used Subaru Forester"
363 Great Deals out of 21,431 listings starting at $1,495

Used Cars For Sale

2011 Mercury Mariner Premier For Sale
27 listings starting at $9,995
2010 Mercury Mariner Premier For Sale
6 Great Deals out of 77 listings starting at $6,995
2009 Mercury Mariner Premier For Sale
4 Great Deals out of 25 listings starting at $5,900
2008 Mercury Mariner Premier For Sale
3 Great Deals out of 74 listings starting at $4,928
2007 Mercury Mariner Premier For Sale
21 listings starting at $4,995