1997 Mercury Courar v-8 Shuddering

Asked by May 23, 2014 at 05:30 PM about the 1997 Mercury Cougar 2 Dr XR7 Coupe

Question type: Maintenance & Repair

My 1997 Mercury Cougar v-8 just developed a shudder today. It happens when I am idling, (at inconsistent timed intervals, i.e. not on an beat), every time I idle. Also, when I accelerate, it happens a little bit, but then you can REALLY notice it between 30-40 mph, then it kind of evens out after I get past that speed. Any ideas?

2 Answers

16,965

oh the English language,cars,noises,and feelings; I know what you mean by not a beat - not nice and even up and down. So;shuttering (no that's for windows) - shuddering ? Without hearing it myself I don't have a real feel for what you are describing as a shudder but I'm guessing it's fuel/air related. PCM reads air intake,load,speed (all kinds of cr_p0 and then tries to optimize the mix, rich gives that kind of bogged down sound and lean goes the other way. Any warning light? Can always take in for scan but I prefer to listen and test. Try disconnecting the air intake sensor and see what that does to the idle and report back.

114,235

Might want to try some fuel injector cleaner. Could be partially stopped up fuel injectors. I use sea foam or CTC to a full tank of chevron with techron gas.

1 of 1 people found this helpful.

Your Answer

Mercury Cougar Experts

  • #1
    lisagayle
    Reputation
    2,200
  • #2
    Tom Demyan
    Reputation
    790
  • #3
    Jessica Cornelison
    Reputation
    600
View All

Related Models For Sale

Used Ford Mustang
731 Great Deals out of 38,316 listings starting at $895
Used Ford Thunderbird
17 Great Deals out of 1,073 listings starting at $6,950
Used Chevrolet Corvette
296 Great Deals out of 20,725 listings starting at $2,990
Used Mercury Grand Marquis
32 Great Deals out of 1,762 listings starting at $1,950
Used Chevrolet Camaro
418 Great Deals out of 30,789 listings starting at $3,550
Used Pontiac Firebird
12 Great Deals out of 778 listings starting at $2,500
Used Chevrolet Impala
514 Great Deals out of 33,923 listings starting at $950
Used Ford F-150
2,319 Great Deals out of 183,061 listings starting at $1,000
Used Mercury Mountaineer
30 Great Deals out of 1,178 listings starting at $2,300
Used Honda Civic
817 Great Deals out of 73,281 listings starting at $1,400
Used Pontiac Grand Prix
29 Great Deals out of 2,739 listings starting at $1,500

Used Cars For Sale

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.