got a 2002 mercury cougar with 60,000 miles and got a code po305 "misfire on 5" how do I fix


Asked by Jul 17, 2016 at 01:45 PM about the 2002 Mercury Cougar 2 Dr V6 Hatchback

Question type: Maintenance & Repair

2 Answers


Well you have an 02 with only 60K on it so the first thing I would recommend is to have the injectors professionally cleaned and the plugs replaced, 14 years on the same set of plugs just can't be good, and varnish is a real problem when a car sets that much. After you get everything cleaned out and running properly again, put some fuel stabilizer in it when you know it is going to be setting. I use Sta-Bil marine in my rigs when they are going to be setting for a while, and so far no problems.

Bob Beaman

Change the plugs and the plug wires.

Your Answer

Add photo

Related Questions

  • 2000 Cougar transmission problem? 39 answers

    I have a 2000 Cougar V6. Recently I would notice some serious jerking when I would get on the highway and hit about 65 mph. Then I noticed it would do it on city roads occasionally as well. Now i...

    2000 Mercury Cougar 2 Dr V6 Hatchback


    Maintenance & Repair

  • 2002 Cougar No Reverse When Warm 5 answers

    Last night, I bought a 2002 Cougar with 97K miles. It ran fine when I test drove. Transmission seemed to work perfectly. We purchased it, drove it down to the gas station 2 miles away and filled it u...

    2002 Mercury Cougar 2 Dr V6 Hatchback


    Maintenance & Repair

  • I have a 1995 Mercury Cougar with 83,000. miles on it and they can't get the check engine light to stay out? 2 answers

    The check engine light won't stay out. The ERG solenoid has been change, they put in a new EGR hose set, nothing is plugged up, they clean out everything and it still comes on. They said it could be...

    1995 Mercury Cougar


    Maintenance & Repair

  • Timing chain broke on my 2001 mercury cougar 24 answers

    I was driving about 30 mph when the timing chain broke. Will that ruin the engine in my 2001 Mercury Cougar V6 DOHC or can just the chain be replaced? I was told by a repair shop it is an interferen...

    2001 Mercury Cougar 2 Dr V6 Hatchback


    Maintenance & Repair

  • I have a 1975 Mercury Cougar XR7 with Landau top. 23 answers

    Has been parked on street since then. She put putted around in it for 37 years to and from the grocery store. Has vinyl 1/2 top and leather seats. WAS mint. Now paint isn't great anymore. Point...

    1975 Mercury Cougar


    Shopping & Pricing

Search Mercury Cougar Questions

Mercury Cougar Experts

#1 lisagayle
Reputation 2,030
#2 Tom Demyan
Tom Demyan
Reputation 650
#3 FordNut
Reputation 600
View All

Related Models For Sale

Used Ford Mustang"
724 Great Deals out of 41,220 listings starting at $900
Used Ford Thunderbird"
29 Great Deals out of 1,169 listings starting at $5,495
Used Mercury Grand Marquis"
52 Great Deals out of 2,580 listings starting at $1,300
Used Chevrolet Corvette"
425 Great Deals out of 20,185 listings starting at $3,688
Used Chevrolet Camaro"
810 Great Deals out of 39,038 listings starting at $2,650
Used Ford F-150"
3,167 Great Deals out of 215,797 listings starting at $1,000
Used Honda Accord"
1,267 Great Deals out of 78,149 listings starting at $1,395
Used Honda Civic"
1,121 Great Deals out of 57,876 listings starting at $1,295
Used Pontiac Firebird"
11 Great Deals out of 893 listings starting at $2,995
Used Chevrolet Impala"
891 Great Deals out of 35,538 listings starting at $795
Used Honda Accord Coupe"
174 Great Deals out of 11,497 listings starting at $1,750
Used Cadillac DeVille"
2,392 listings starting at $1,600
Used Lincoln Town Car"
55 Great Deals out of 2,408 listings starting at $1,542
Used Chevrolet Monte Carlo"
7 Great Deals out of 2,061 listings starting at $3,850