# 95 kia sportage miss firing after spark plug/wires change **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** sportage, kia\ **Created:** [August 30, 2009, 2:38am UTC](https://community.cartalk.com/t/95-kia-sportage-miss-firing-after-spark-plug-wires-change/35806 "2009-08-30T02:38:39Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![coreyoso](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@coreyoso](https://community.cartalk.com/u/coreyoso)\ **Post date:** [August 30, 2009, 2:38am UTC](https://community.cartalk.com/t/95-kia-sportage-miss-firing-after-spark-plug-wires-change/35806/1 "2009-08-30T02:38:39Z")
Hi, my kia sportage was running really badly, it wouldn’t accellerate, it would choke and slow down unless I ran it at high rpm. Someone suggested my spark plugs might be oily, so I looked into it online and found that I should replace the PCV valve. So I replace it and the plugs. The car ran much stronger when finnished but was not running on all cylinders. I took it apart to make sure I didn’t do anything stupid, everything looked good, put it back together and still misfiring. So I decided to get new wires and I installed them, and still misfiring. So I decided to take it apart and inspect the plugs. I found 1 plug that looked different, not as covered with blackish color. So I put it back together with one of the old plugs in its place and still misfiring. Regarding the wires… I replaced 2 wires, the other 2 plugs are in sheaths that are attached to the bottom of the ignition coils, I couldn’t find those in my town. The wires I replaced plug into these coils. From my inspection of the plugs it looks like the non firing plug is the 1st in line and connected to a wire that I replaced. What the heck do I do now? I am somewhat a novice, but happy to try more. I am a little frustrated by this as there is a bunch of stuff I have to remove to change the plugs!!! Thanks In Advance, Corey ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [August 30, 2009, 4:12am UTC](https://community.cartalk.com/t/95-kia-sportage-miss-firing-after-spark-plug-wires-change/35806/2 "2009-08-30T04:12:57Z")
I just diagnosed a Sportage today (not so hard to pull the plugs). This is good as you get to do it again,you need to perform a compression check. Get a new fuel filter on it (they are in a bad position so I can just bet its been ages). Then you are going to have to get a fuel pressure gague on it. Lets see where this data leads us. ---
**Author:** ![coreyoso](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@coreyoso](https://community.cartalk.com/u/coreyoso)\ **Post date:** [August 30, 2009, 4:32am UTC](https://community.cartalk.com/t/95-kia-sportage-miss-firing-after-spark-plug-wires-change/35806/3 "2009-08-30T04:32:33Z")
I suppose I’m being a weenie about the work to pull the plugs, sorry. but compared to my honda and previous toyota, it took me a while to even find them 🙂 I don’t really have the resources or equipment to do a compression test. And… after I changed the PCV valve the motor ran strong, withOUT the previous sputtering and dying characteristics. Again, the motor ran strong, but a constant misfire, like 1 cylinder was not firing. Previous to changing the plugs and wires this was NOT the case? I don’t know if your recommendation stands with these clarifications by me. Thank You, Corey ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [August 30, 2009, 9:10am UTC](https://community.cartalk.com/t/95-kia-sportage-miss-firing-after-spark-plug-wires-change/35806/4 "2009-08-30T09:10:06Z")
This engine has COP ([ignition] Coil-On-[spark] Plug), doesn’t it? Swap the COP with another position to see if the misfire follows; or, just replace the COP. Then, you can have a compression check done (when your treasure permits). ---
**Author:** ![coreyoso](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@coreyoso](https://community.cartalk.com/u/coreyoso)\ **Post date:** [August 31, 2009, 6:28am UTC](https://community.cartalk.com/t/95-kia-sportage-miss-firing-after-spark-plug-wires-change/35806/5 "2009-08-31T06:28:33Z")
Today I verified every wire is creating a spark by looking at a plug attached to the wire. When I pulled each Plug the 1st looked clean and more new. What dies this mean? Thanks! Corey