What is spark plug gap setting for a 1998 Kia Sephia?

Question edited for clarity.
Question moved to model category.

It depends on the plug that you use. Some are Pre-Gapped.

Spark plug gap - Kia Forum

kia-forums.com https://www.kia-forums.com > threads > spark-plug-gap
Aug 9, 2019 - I'm installing new NGK spark plugs on a 07 Spectra. There is no-where in the manual that show the correct gap. They told me at Auto-Zone the gap is .044...

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2004 KIA SPECTRA 1.8L L4 Spark Plug

RockAuto https://www.rockauto.com > catalog > kia,2004,spectra,1...
GM Original Equipment; Conventional; Pre-Set Gap: 0.041" ($0.50 Rebate Available!).

2004 KIA SPECTRA 2.0L L4 Spark Plug

RockAuto https://www.rockauto.com > catalog > kia,2004,spectra,2...
Original Center Electrode Material is Copper/Nickel; Do Not Gap, Gap is Preset. OE Fine Wire Platinum; Pre-Set Gap: 0.031". Alternate.

.40-.45 should be fine.

Inside the boot between the coil and the spark plug.

Bet if you put a code reader on it it would come up misfire. You might consider checking your spark plugs. We have gotten 3 Kia's in the last 3 years, all with same problem. And every time the plugs were original equipment and wayyyy out of gap, etc. Bought new, gapped them correctly and problem sovled.

NGK plugs seam to work the best.ive tried super dupper platnums and spli fires whent back to the factory ones NGKfor your vehicle i think there NGK BKR6E might just ask an auto parts store for 2000 spectra NGK plugs they should be pre gapped but write the gap on the box at the store they can pull it up. the plugs come pre gapped but you should always check them.

4 just lift the plastic cover on the valve cover and you will see.

Hey there!
I'm going to post this as an answer, but...I suspect that the problem is the spark! Not that you don't have spark but the spark plu gap may not be set correctly. Note they don't come pre-gapped from the manufacturer. You may want to pull the plugs, ( one at a time as not to miss place the firing order for reinstallation of the leads ). Measure what it was and set them to fac. spec. ( 0.xx? ). A guess but probably 0.42". I am suspecting you will measure it at 0.65" too much!!

If that that turns out for you please let me know. ASH

By the sound of it you have a problem like the Plugs
you fitted were either the gap was either to big or to small so remove them again and recheck the gaps and set to 25 thou (thats about the same thicknessas the thickness of a tissue box) and also check the plug leads {dont put any lead to anyother plug than the one it goes to.
Firing order is 1342 in that order.

did you gap your plugs to proper gap

have you changed the fuel filter.