Tune up

[Reek09]

What plugs and wires are reccomended to go on an 03 marauder for a tune up? I got a misfire on cylinder 3 and I also need and air temp sensor.

[Pat]

Stock spark plugs Motorcraft SP447. Your misfire may be caused by a plug or a Coil on plug, AKA COP. Sometimes corrosion may cause a poor contact between the COP spring and the spark plug.

There are no traditional spark plug wires, just signal wires from the computer to the coil assembly sitting on top of each plug.

Note; when you ask for help please give the mileage and if any Modifications were done as this helps greatly.

Regards,

[SC Cheesehead]

^^^^^ What Pat said ^^^^^^

What's the mileage on the car? The plugs could be bad, but COP is a likely culprit.

[fastblackmerc]

See a listing of spark plugs here:

http://www.mercurymarauder.net/forums/showthread.php?t=58650

IMHO.... stay away from the iridium plugs, very costly and I don't think you get any benefit on a NA motor. I use NGK TR6's and I replace them every year.

Check previous threads for plug changing procedure, use of anti seize, proper torque and a little dab of silicone.

[Reek09]

I got a little over 100,000 on my 03. I haven't changed the plugs in a while that's prob what it is. Is this something I should take to the dealer or I can do it myself?

[dohc324ci]

You can do your self in half hour 45 min...but make sure you triple check that you tighten those plugs! You could have a spark plug blow out if you dont.

[RacerX]

And don't tighten too much! It's aluminum after all! What is it guys? 14lbs?

[sd8683]

And don't tighten too much! It's aluminum after all! What is it guys? 14lbs?

If I remember correctly its 11lbs:confused: