Question about 2002 Mercury Cougar

2 Answers

Cylinder 6 missfire

I recently shot the spark pulg from the 6th cylinder of my 2002 mercury cougar 2.5 liter DOHC engine. I got all new plugs and wires an put a helicoil on the 6th cylinder so the plug would stay in. about a day later the engine started showing loss of power and when i stoped at stoplights the car would shudder constantly in idle. Going up hills and off the start the car shudders up till bout 30 mph then jets off, acceleration is tough because i have to slam the gas to the floor to get it to go. The engine light says cylinder 6 misfire an i went to shops around here they keep telling me the helicoil came loose and i have to get the header re-milled but i9ts gonna cost me a buttload of cash to take the header out. What should i do? could it be possibly anything other than the helicoil?

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Mercury Master
  • 75,822 Answers

The repair will take removing the head and replacing it most likely.

Posted on Mar 18, 2017

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Mercury Master
  • 15,557 Answers

Could try never seize thread coating

Posted on Mar 18, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 99 cougar v6 P0352 misfire cylinder 3 and 4 replaced igntn coil..

Had the same problem, car was misfiring on cylinder 3 and 4. replaced wires, plugs, and ignition coil. still misfired on the same cynlinders. turned out the main engine wiring harness plug in was coming loose. spent well over $150 on the unneccesary repairs and ultimately fixed the problem wit a $3 bag of wire ties to hold the plug in...

Posted on Jun 01, 2009

  • 1986 Answers

SOURCE: I have a misfire on cylinder 4.

It sounds like your car is having intermittent misfires as it is only happening under load. This is really hard to diagnose based on a description.
You could be getting a bad air/fuel mixture, bad wiring, bad rings, oil or coolant leak into the engine, etc...
Scan the car with an OBD tool to see what the code is as that will help narrow down the cause.

Posted on Sep 08, 2009

wracefans24
  • 1985 Answers

SOURCE: I have a 1999 Mercury

check for dirt or rust in those injector screens

Posted on Jan 03, 2010

  • 1374 Answers

SOURCE: i have a 2001 mercury cougar with the 2.5L v6

Its time to do a injector balance and cylinder leakage test, to determine whether the injector or its circuitry is bad . The leakage test will tell you if the cylinder has a compression leak.

Posted on Mar 16, 2010

  • 1757 Answers

SOURCE: I mixed up the fireing spark plug cables on my 6

On the 2002 Mercury Cougar
For the 2.5L V6 DOHC:

Firing Order:
1-2-3-4-5-6

Cylinders:
.....(back)
1......2......3
4......5......6
.....(front)

Ignition Coil:
.(back)
4...6...5
3...2...1
.(front)

Posted on Mar 24, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What do codes po306 mean ? for a mercury cougar 1999


code po306 means cylinder number 6 misfire detected, possible causes air leak in the intake manifold or in the egr or pcm system, could have mechanical problem number 6 cylinder like burned or worn valves,could have clogged fuel injector or faulty fuel injector,could have bad ignition coil, bad spark plug or bad spark plug wire.

Dec 13, 2011 | 1999 Mercury Cougar

2 Answers

What is the spark plug firing order for a 95 mazda mx6?


1995 Mazda MX-6
2.0 liter DOHC L4

11191e2.gif 1995 Mazda MX-6
2.5 liter DOHC V-6


78a826e.gif

Aug 25, 2010 | Mazda MX-6 Cars & Trucks

1 Answer

Have 2002 mercury couger and need to figure out which coil pack is number 3


Facing the engine ,in front of the engine,where the pulleys are,number three cylinder is the third one back,on your left.It goes on the left 1 2 3,,,and on your right 4 5 6,if it is a 8 cylinder it is on your left 1 2 3 4 and on your right 5 6 7 8..If this was helpful,please rate,and thank you.

Jun 29, 2010 | 2002 Mercury Cougar

2 Answers

I have a 2001 mercury cougar with the 2.5L v6 engine and the number 2 cylinder is misfiring. ive replace the spark plugs and wires but it still misfires


Its time to do a injector balance and cylinder leakage test, to determine whether the injector or its circuitry is bad . The leakage test will tell you if the cylinder has a compression leak.

Mar 16, 2010 | 2000 Mercury Cougar

3 Answers

I need a spark plug wire diagram for a 1992 Toyota Camry 4 cylinder


1992 Toyota Camry Sedan
3.0 liter DOHC V-6 (3VZ-FE)

Cylinder # Front, passenger to drivers side 2-4-6
Cylinder # Back, passenger to drivers side 1-3-5

Distributor 12 O'clock post # 6 cylinder
10 O'clock post #1 cylinder
8 O'clock post #2 cylinder
6 O'clock post #3 cylinder
4 O'clock post #4 cylinder
2 O'clock post #5 cylinder

Good luck and hope this helps.

Jan 12, 2010 | 1992 Toyota Camry V6

1 Answer

Cougar 2.5 liter cylinder numbering?


it goes "1 2 3 4 " #1 Is Closest to the BELTS

Nov 03, 2009 | 2002 Mercury Cougar

1 Answer

I mixed up the fireing spark plug cables on my 6 cylinder 2002 mercury cougar. I need the right order please.


On the 2002 Mercury Cougar
For the 2.5L V6 DOHC:

Firing Order:
1-2-3-4-5-6

Cylinders:
.....(back)
1......2......3
4......5......6
.....(front)

Ignition Coil:
.(back)
4...6...5
3...2...1
.(front)

Jun 13, 2009 | 2002 Mercury Cougar

1 Answer

Check engine light on, engine running rough


evaporator is part of the fuel system, missfiring could be spark plug or bad coil

Mar 26, 2009 | 2001 Mercury Cougar

Not finding what you are looking for?
2002 Mercury Cougar Logo

Related Topics:

130 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

fordexpert

Level 3 Expert

5501 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...