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There isnt really a mention on how often you should change your spark plugs some manufacturers say certain plugs are good for upto a certain mileage Check with your spark plug manufacturers recommendation on spark plug changing intervals
Check the spark plug first, if it is fouled, wet, carbon or fuel deposited all up, Don't just change it, Do a complete tune up and change them all, also add Seafoam to the tank to clean the entire fuel system, that should take care of any injector problems that might be causing your problem,,, and use a high grade fuel from now on
Follow these steps on how to replace thespark plugs.
1.First, you turn off the Sonataengine and allow it to cool. This normally takes about 30 minutes.
2.Raise the hood and locate thespark plug cables along the side of the engine. Spark plug cables are normally1/4 to 1/2 inch thick and plug directly into the engine.
3.Grasp the cable by its boot.This is the thicker piece that covers the spark plug or spark plug well. Turnthe cable back and forth until the lock releases. Pull back on the cable toremove it. Complete the replacement process for each plug before moving on tothe next. Slide the socket, extension and wrench over the spark plug. Turn thewrench to the left to unscrew and remove the plug from the engine. Spark plugsockets have a cushion inside that grab the end of the plug to hold it inplace.
4.Clean the well and boot withthe wire brush. Do not rub hard on the well or boot or it will cause damage.Spray silicon in the boot and on the spark plug threads, so you can easilyremove the spark plug the next time.
5.Insert the socket into the welland gently thread it into the engine. Test the tension with the tester. Thetension a spark plug needs varies by plug manufacturer. Check the package tofind the correct tension. If you need more tension, tighten the spark plug. Forless, loosen or unscrew the plug.
6.Place the cable back onto thespark plug. Repeat Steps 2 through 7 for the other plugs. Work your way downone side of the engine and then down the other as you replace or clean thespark plugs.
This are the things you need for the job, 16mm spark plug socket,Socket wrench with extension, Wire brush, Silicon spray, New spark plug,Tension tester
the engine control unit has detected a fault light illuminated which in turn reduces ability to gain high revs as a damage limitation exercise , known as limp home , car requires diagnostic computer to check fault codes to indicate faulty component causing ecu to go into limp home mode
I believe you will need a 3/8 spark plug socket. removed spark plug wires. remove spark plugs and install new plugs. Tightening torque is 27 Nm then reinstall spark plug wires with corresponding cylinder left to right goes 1-4.
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