Name: John Shields. Ford Model: ford focus. Ford Year: 2018. UK/Ireland Location: Lanarkshire. Posted November 7, 2009. try a few drops of clean engine oil around the spark plug hole leave it to soak in then use a ring spanner on the t bar off the spark plug socket to give you more leverage. Quote. Originally Posted by hillbilly25002000. on the 97 to 2003 f150s with the 4.6 liter engines the spark plugs are only held in by 2-3 threads and if not torqued down just right it will shoot the plugs out of the heads. That is another thing i have heard about these trucks. I have heard that the 5.4 does it too. Replies. Common and known fault with washer jets leaking and filling plug recess .Later modified to prevent this happening. You can dry up water , suck it out with a tube or blow it out with an air line .Then either seal or replace washer jets to prevent it happening again .Should be o.k after that .Best of luck . There are two parts to diagnosing bad spark plugs in your Fiesta. The first is to identify the misfiring cylinder. The second is to inspect the plug. If it looks ok, follow the diagnostic steps listed below. If it doesn’t look ok, use the chart below to determine why the plug has gone bad. The 2002 Ford Focus has 58 problems reported for engine failure. Average repair cost is $2,570 at 110,000 miles. (Page 1 of 3) Correct spark plugs on a 2003 Ford Focus. Champion Platinum Power 3408 Spark Plug (Carton of 1) – RS10PYC. For any 2003 Ford Focus, you can use CHAMPION 3408 spark plugs. These will be an exact fit and will match the required specifications of your engine. As this 2003 Ford Focus features a 4 cylinder engine, ensure you purchase 4 spark plugs. 10 mm socket Ratchet or power tool Sparkplug socket Procedure Put the vehicle in park. Wait for the engine to cool down. Open the hood. Remove the ignition coil electrical connectors using a small screwdriver to unlock the connectors. Loosen and remove 10 mm bolts that hold ignition coils in place. Pull out the ignition coils. The only way you can screw up is by using the ratchet to start the threads. Always start the spark plugs by hand- even if, like on our vehicles, you have to use a 3/8 extension to reach inside the spark plug tubes. You'll need at least a 10" extension, or a 6" and 3" together. A 5/8 spark plug socket, a ratchet, a tube of anti-seize, and some rags. 22pEut4.