The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks. It’s no
After installing your new spark plugs, compare the old ones to a spark plug wear chart to determine if there are any issues with the way your engine is running. A similar chart can be found in the back of all Haynes repair manuals.
Locate the Spark Plugs. Locating the spark plugs in your 2012 Ford Focus is relatively straightforward. Open the hood and look for a series of rubber or plastic wires that are connected to individual components on top of the engine. These wires lead to the spark plugs, which are typically threaded into the engine cylinder head.
All the ceramics were light tan, even #4. The gaps were all .030, well within the .027-.031 Ford spec. I replaced them with the recommended Motorcraft plugs, SP-537/CYFS-12Y-2 Iridium plugs. I gapped the new plugs at .027. For a turbo DI engine I was pleasantly surprised how little wear there was at 62,000 miles on the plugs.
Then soak the broken plug shell with a generous amount of penetrating oil. Give it a few minutes to work, then tap an appropriately sized easy out firmly into the empty shell (Figure 3). Using an appropriate size socket bar, brace yourself, and while holding the socket squarely on the easy out, apply a firm, steady counterclockwise pressure.
The 2006 Ford F-150 has 46 problems reported for spark plugs break off in head. Average repair cost is $1,210 at 88,550 miles. (Page 1 of 3)
The 2004 Ford F-150 has 27 problems reported for spark plug pops out of head. Average repair cost is $610 at 136,750 miles. (Page 1 of 2)
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ford focus spark plug problems
