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What would cause a 2002 Kia Spectra to idle rough after changing the spark plugs?
Wiki User
∙ 15y ago
I would look for a vacuum leak. Forget about a vacuum leak, look at the wiring harness that powers both ignition coils over plugs 2 and 4. If that wiring harness or the plugs are just the least bit cracked, it needs to be replaced. The coils aren't getting proper voltage. _________________ If it was running fine prior to the installation of your plugs, then it's safe to say that it's something to do with the plugs. My guess, off the top, would be that you've reinstalled the wires incorrectly. Verify your firing order, and confirm correct installation. Otherwise, I would recheck plug gap, then get into the expensive stuff.
Wiki User
∙ 15y ago
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