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I bought a 98 kia sephia it ran fine at first now its missing. its also showing a misfire on the number 1 cylinder and low current on same cylinder......I have replaced the spark plugs gaped at .044, the idle air flow sensor, the coil packs, and the fuel injectors, but still missing any ideas as to what else could be causing this any help would be apprecited.
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1985 Subaru Loyale (wagon), 2000 Kia Sephia (sedan), and 1969 Mercury Comet (coupé)
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... any ideas as to what else could be causing this ...
Yes, the Wires that connect the Coil Pack to the external Plugs... Have you Checked those? ...Because their plastic ends trend to Break easily, causing false contacts.

Check those and if they're worn / loose \ damaged, you might try to change them and see if that affects the overall engine performance.

Kind Regards.
 

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2008 SpectraSX, 2014 Optima LX,2006 Jeep Liberty, Linux Mint Mate
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You might want to check that the .044 is the correct gap. I thought the older Sephia/Spectras gap was different..Look for a lable attached to the under side of the hood.
What JesZek says is valid also.
Dave
 
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