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Q: Replaced spark plugs on 2005 Mitsubishi Endeavor

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If the spark plugs were replaced, does that mean a tune-up was performed? My truck was shaking upon my return trip to North Carolina. I took it to the shop and the result was a damaged coil and a small leak. The recommendation was to replace all of the spark plugs. I did so, but was wondering if I still need a tune-up.
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"Tune up" doesn't mean what it once did. At one time, you replaced your plugs, wires, cap, rotor, points, set timing, idle speed and cleaned your carburator.

With electronically controlled engines and fuel injection, the basic tune up consists of plug replacement, ignition wires (if required and equipped), coil boots (if equipped), check the air filter, and that's about it. Sounds like if you are in good working order after your maintenance and repairs now, you are probably good to go.
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