Car misfires and sputters

5

Asked by Jun 28, 2011 at 01:43 PM about the 1999 Mercury Cougar 2 Dr V6 Hatchback

Question type: Maintenance & Repair

Car misfires and sputters only when the car is cold and only when you're stepping lightly on the gas pedal, works fine on open throttle (runs fine when running at temperature). What could be the problem? Check engine light never comes on. I've changed spark plugs, wires, and fuel filter, cleaned the intake, oil & filter changed frequently. The car has had the stock air filter taken out & a short air intake installed (but ran fine with it).  Also, when you take off the short air intake pipe at the intake (pipe has the MAF sensor in the piping), it works exactly the same... would have thought that it wouldn't run right without the air running through the MAF sensor...

3 Answers

5

It is a 1999 Mercury Cougar V6

135

Tune up time

5

I wish that were the problem... it's had a complete tune up, except for coil pack.

Your Answer

Add photo

Related Questions

  • Misfires, spudders, wants to die!!!!! 5 answers

    When it's cold outside car revs up and down, wants to die. When I'm over 2000 rpms it's fine. When I proceed to brake the car wants to die but still go and brake pedal feels like I'm pressing on ...

    2000 Mercury Cougar 2 Dr V6 Hatchback

    -

    Maintenance & Repair

  • Car starts but sputters to a stop during stop it idle. Winter time

    I have a 2001 Mercury Cougar. It's been a really good car to me. This is my first winter driving it. New battery. It's starts and turns over. Lights, radio and heat turns on not problem...but when ...

    2001 Mercury Cougar 2 Dr V6 Hatchback

    -

    Maintenance & Repair

  • Car won't start 2 answers

    My car won't stay running, I ave replaced fuel pump. And filter. I'm getting plenty of pressure out of the valve. It will start every once in awhile for six or seven times. When it does start it wi...

    1995 Mercury Cougar 2 Dr XR7 Coupe

    -

    Maintenance & Repair

  • my 2000 mercury cougar 4 cyl began knocking or tapping 2 answers

    was running fine drove 10 miles waited 2 hours and it began knocking of tapping sputtering poor performance idles rough. have changed plugs and wires checked fluids plugs and wires made no improvement

    2000 Mercury Cougar 2 Dr I4 Hatchback

    -

    Maintenance & Repair

  • 2001 mercury cougar 2.5 can a rev limiter cause this? spits and sputters 1 answer

    in park you can rev it up to the rev limiter. go to drive it and it gos about 25 to 35 mph at 1500 rpm spitting and sputtering,there are no error codes. i have changed the plugs,wires,fuel filter,pc...

    2001 Mercury Cougar 2 Dr V6 Hatchback

    -

    General

Cougar

Looking for a Used Cougar in your area?

CarGurus has 235 nationwide Cougar listings and the tools to find you a great deal.

ZIP:

Search Mercury Cougar Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercury Cougar Experts

#1 lisagayle
lisagayle
Reputation 2,090
#2 Tom Demyan
Tom Demyan
Reputation 670
#3 FordNut
FordNut
Reputation 610
View All

Related Models For Sale

Used Ford Mustang
530 Great Deals out of 42,736 listings starting at $1,699
Used Chevrolet Camaro
401 Great Deals out of 40,630 listings starting at $3,500
Used Mitsubishi Eclipse
44 Great Deals out of 1,506 listings starting at $2,495
Used Honda Civic
813 Great Deals out of 70,579 listings starting at $1,200
Used Mercury Grand Marquis
29 Great Deals out of 2,149 listings starting at $1,985
Used Chevrolet Corvette
284 Great Deals out of 20,514 listings starting at $3,688
Used Toyota Camry
1,152 Great Deals out of 97,111 listings starting at $1,250
Used Chevrolet Malibu
1,132 Great Deals out of 82,876 listings starting at $2,328
Used Chevrolet Impala
902 Great Deals out of 35,273 listings starting at $1,700
Used Ford Escort
450 listings
Used Ford F-150
3,020 Great Deals out of 207,755 listings starting at $1,000
Used Volkswagen Beetle
221 Great Deals out of 8,775 listings starting at $1,800