2002 Sportage Misfire Update Issues - Kia Forum
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#1 (permalink) Old 07-26-2010, 10:24 AM
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Default 2002 Sportage Misfire Update Issues

Its been about 4 to 5 months since having posted any further questions regarding my sportage's misfire issues. I am sad to say that this update is not going to tell you its resolved. Let me catch you up where I left off with my attempts.

Had changed/replaced
Plugs (gapped at 28-31)
coil wires
coils
coil wiring harness
Airfilter
Upper fuel filter
Checked the lower fuel filter and cleaned it as thought it was a fuel delivery issue.

Prior to all these replacements had a "solid" check engine light. Codes that came back were 300, 301, 302, 303 and 304 (all misfires). After the replacement and for the next few months ( Had come to wits end trying to resolve this) only had 300 and 303, but now while driving would get a "blinking" check engine light. Learned that this meant the engine was dumping raw fuel into the catalytic converter. As I only have one vehicle and drive about a 100 miles a day in Texas heat for my job, continued checking to resolve the check engine but still had to drive it. Was getting about 16 miles to the gallon and noticed that it had no problem starting cold, but when hot it took more and more cranks to get it going. Also started smelling a strange ordor which I later determined to be be the extreme heat of the catalytic converter. Cranking after driving it became worse and worse, Changed out my plugs and went to autozone who stated that the gapping for the plugs on there computer showed .44. Well that simply made my car run worse so it purchased a new set and reinstalled them at 28. I also switched my coils to determine if it was a bad coil. Started it up and for the first time I had no check engine light. I was so estatic. That lasted for about 15 miles and then it came back on.

Had the check engine light check and was surprised that now I had only one code which was 302. I thought this strange as I had switched coils and really never had a problem with Cylinder 2 except for in the begining. It has been Cyclinder 3 where the issue has mainly been. Puzzuled as to why.

I plan to replace my catalytic converter this week with an after market single stage converter which I have been quoted will cost 175 to 240. I am hoping that this will resolve many of the issues I am having, but need advice on converter replacement and about why I am having a new issue with Cylinder 3.

Any and all comments or advice is greatly appreciated.
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#2 (permalink) Old 07-27-2010, 12:38 AM
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What about your fuel injectors? Could there be a problem there?

I own my second Sportage so I must really like em. I consider this one to be my second husband. Main issue with mine was the Timing Key(woodruff)
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#3 (permalink) Old 07-27-2010, 08:34 AM
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What about your fuel injectors? Could there be a problem there?

Lol I guess. I am pretty much at my wits end. I would say maybe but now the problem has gone from cylinder 3 to cylinder 2 and thats with switching out coils. Never had a problem with 1 or 4 which is where the coil was at before switching it to 2 and 3. How can a problem jump like that?
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#4 (permalink) Old 07-30-2010, 04:26 AM
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I kept having what sounded like mis-fires but I never got a code for a mis-fire. After replacing my mass air flow sensor, it went away then.

I own my second Sportage so I must really like em. I consider this one to be my second husband. Main issue with mine was the Timing Key(woodruff)
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#5 (permalink) Old 07-30-2010, 04:32 AM
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Do you have those spark plugs with a brand name that has 3 letters. I dont remember what it is but something like EKG. My mechanic says you have to use those kind. Dont buy those expensive plugs.
The only time I have had fuel dump was when I drove the car with out the O2 sensor in Bank 1. And it did it REAL bad. My mechanic said it was sensing no exhaust fumes so it dumped fuel. Some kind of massive flooding. He said he had to dry out each piston chamber.

I own my second Sportage so I must really like em. I consider this one to be my second husband. Main issue with mine was the Timing Key(woodruff)
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#6 (permalink) Old 07-30-2010, 04:39 AM
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If you are mechanically inclined, I would strip off everything not needed to run. Then add one thing at a time until it gives a code or a clue. Even if it means disconnecting the CAT ,exhaust system, air-intake, and timimg cover.
We were stumped for a MONTH until we got one clue as to our problem. It was like the car was crying for help and pointed us in the right direction. The front main seal just started leaking right before our very eyes, thats when we found out about the woodruff key(timing key). After that it was all downhill!!!

I own my second Sportage so I must really like em. I consider this one to be my second husband. Main issue with mine was the Timing Key(woodruff)
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#7 (permalink) Old 07-30-2010, 04:41 AM
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How is your Knock sensor?

I own my second Sportage so I must really like em. I consider this one to be my second husband. Main issue with mine was the Timing Key(woodruff)
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#8 (permalink) Old 07-30-2010, 04:53 AM
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mis·fired, mis·fir·ing, mis·fires
1. To fail to ignite when expected.
That explains the fuel in the cat.
Do you have any of your old coil packs left? I would change out ONLY the one you are getting the code on. Put one of the old ones in there and see what happens. I think your cat would be ok if you can get this firing thing fixed. I am trying to think what could cause that. I will ask my mechanic and see what he says. I may see him tommorrow. He is an expert in the combustion area

I own my second Sportage so I must really like em. I consider this one to be my second husband. Main issue with mine was the Timing Key(woodruff)
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#9 (permalink) Old 07-31-2010, 12:20 PM
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Originally Posted by arkansasfish View Post
mis·fired, mis·fir·ing, mis·fires
1. To fail to ignite when expected.
That explains the fuel in the cat.
Do you have any of your old coil packs left? I would change out ONLY the one you are getting the code on. Put one of the old ones in there and see what happens. I think your cat would be ok if you can get this firing thing fixed. I am trying to think what could cause that. I will ask my mechanic and see what he says. I may see him tommorrow. He is an expert in the combustion area

See my reply to you on the cat issue. The cat must work some as it does run. Just takes longer to start after hot. The P302 could be caused by the clog as it causes improper blowback which I have read it part of the 2 cat system to work efficiently. Using NPK sparkplugs as this has been the recomended by this forum.

May take this route before doing the cat repair/replacement

I hope your dating your mechanic as that is the only way I could afford to keep my kia
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#10 (permalink) Old 08-02-2010, 04:26 AM
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I gave him a Jeep Cherokee that I had that had been sitting for a long time. The lifters were in real bad shape. So he did a lot of work for me. I try not to bother him on the small things. He is more into the internal engine, combustion, pistons, lifters and stuff like that. I got a list of questions to ask him. I hope to see him tomorrow. The first thing he asks when he sees me is "What did you tear up now?". He works from his home and there is always a line of people out there waiting on him to work on their cars. He used to have a garage but said he was working 7 days a week. I would like to open my own garage and just use him for diagnosis. Its amazing sometimes that he knows what is wrong without the OBD2 code reader.

I own my second Sportage so I must really like em. I consider this one to be my second husband. Main issue with mine was the Timing Key(woodruff)
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