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Q: I have a p0306 code changed coil from number 6 to number 5 still have p0306 code on 2005 Toyota 4Runner

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should I change the injector
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Check compression, injector pulse and coil signal before you buy any parts.
Check for a cracked porcelain on the miss firing spark plug especially if you just replaced them.
You can move the injector as well to see if the miss moves.
Hope this helps.
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