Honda wires last just about forever so if you still have them on your engine, leave them be unless they show signs of external damage. Don’t change the wires if they’re OE (Original Equipment). Use NGK or Nippon Denso plugs only in your Honda. The first step I take to solve a rough idle issue is to start with a good tune up. So if you have a rough idle with your 4 cylinder Honda, this might be a contributing factor to your rough idle. This creates a ‘choppy’ power delivery that may be most noticeable at idle. Because of this, the crank spends a LOT of time in rotation before the next power stroke. 4 cylinder engines fire every 180º of crank shaft rotation. ![]() In fact, in the end it may still be there to some degree because of the nature of a 4 cylinder engine. There are a lot of things that can contribute to an idle issue on your Honda.
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