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[quote=”dtaylorh17″ post=146233]I recently replaced an ignition coil on my buddies 07 Sienna because he was showing the code for the #3 cylinder. It kept the CEL off for a day but it came back on with the same code. Where should i look next? Thanks[/quote]
Possible causes. bad/fouled plug bad coil, injector problem. Pull the plug and check
for fouling. Swap the coil you replaced with another coil to see if the misfire moves. if so
the coil is bad or having a problem. more in this link. Did you use a Toyota coil or aftermarket?http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
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