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 Kfx Headers |
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 Aug 2 2008, 04:06 PM
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Senior
Group: Members
Posts: 484
Joined: 11-February 08
From: D-Town
Member No.: 41,048
Status: 
Location: Dallas, Tx
Drives: 2006 Kia Rio LX
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QUOTE(Komptek @ Aug 2 2008, 04:44 AM) Actually I emailed KFX.ca about the issue and the pipe should have come with the two sensor holes in it, as well you should have had the bolts in there as well as new gaskets. Did you call them or email them about the issues first before trying to fix it yourself? As for the fit, yah they new about that, it's because the pipes were made for the Catback piping system currently in development.
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yeah there were few mistakes that they did, but KFX just send it like that. I already fix mine i don't wanna bug KFX about those 3 mistake, but obviously that S\/cks big time, i mean those are custom made for our cars, they shouldnt have those problems. First the sensor...which i have to pay 20 bucks, and then to elongate the holes which it just took time to do it. mine came with gasket, but there are other rio owners that didn't come with it. i forgot, there is also an accent owner who pay for this, msvg? am i right? did you already got urs?
This post has been edited by LePapirrikY: Aug 2 2008, 04:07 PM
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Aug 26 2008, 08:08 PM
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Full Member
Group: Members
Posts: 117
Joined: 21-July 08
Member No.: 48,677
Status:
Location: Canada
Drives: 92 Mustang GT 408w, 08 Accent
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I see an immediate problem with this. There is no Cat. This will really screw with the computer in an OBD2 vehicle. There HAS to be a Cat in it, unless it has been flashed. You know that bung you had to weld in for the O2 sensor? That should be the the after-cat O2, which is why it didn't have it, you don't have a Cat. After-cat O2 should stay almost perfectly steady in the data-stream, now with what you have done, it's going to fluctuate all over the place, causing terrible fuel economy, and poor running with the computer constantly trying to find where the A/F needs to be, but will never find it. With a malfunctioning O2 sensor like you have, the computer automatically puts the car in a pre-set rich running state, which pretty much makes it ignore all other sensors to an extent, this is so it cannot run lean and burn down the engine. I can't believe your MIL light hasn't come on yet.
If there was a way to keep the cat in there, I would consider buying this
This post has been edited by liquid_02: Aug 26 2008, 08:12 PM
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Aug 27 2008, 12:29 PM
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Senior
Group: Members
Posts: 484
Joined: 11-February 08
From: D-Town
Member No.: 41,048
Status:
Location: Dallas, Tx
Drives: 2006 Kia Rio LX
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thanks liquid_02 and GotAccent? there are some things that i don't know, and this is one of them. can yall explain me more about this i would really appreciate.
what liquid_02 its saying its that there's no cat...well what i toughth, i'm maybe wrong, is that we have 2 cats, one that is in front of engine and the other at the end of the flange. now my understanding was the same as GotAccent? that basically the second sensor its just to make sure that both of them are reading the same thing. Now few days ago i got CEL with this code P0420
The PCM has determined that the catalyst system efficiency for bank 1 is below threshold for the current engine operating conditions. (bank 1 identifies the location of cylinder #1, while bank 2 identifies the cylinders on the opposite bank)
Definition
Catalyst efficiency low-bank1
Explanation
The oxygen sensors monitor the catalytic converters ability to store oxygen.
Probable Causes
1) Catalytic Converter defective (Failure possibly due to #2, 3 or 4)
2) Engine misfire or running condition
3) Large vaccum leak
4) Engine oil leakage into exhaust value guide seals, piston rings.
well i think is for reason 3, because i wasnt able to torque really good, at least i did it from the engine to headers, but the flange i don't think its very thigh since i didnt have that much of space. I'll do that when i get my exhaust done.
What do you guys think?
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Aug 27 2008, 01:57 PM
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AMSOIL T1 Direct Dealer
Group: Members
Posts: 1,484
Joined: 9-August 07
From: Fort McMurray, AB
Member No.: 33,740
Status:
Location: Canada
Drives: '07 Accent SR, '08 Santa Fe Limited
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I think that since this header has removed the CAT you need to make a small modification to the second O2 sensor. You need to get a second threaded bungy welded to the top of the exsisting bungy. Without this you will get readings that there is a problem. Under normal conditions the second O2 readings are differant the the first O2 due to the CAT being in-between them. Without the CAT it's getting too close of a reading the same as the first O2. By lengthing the bungy for the second O2 sensor you don't have it directly in the exhaust, therefore giving it a read much like it would have gotten if the CAT was still installed. If you look into this ont he web you'll see this is what a lot of cars need to do when removing the CAT between the two O2 sensors. Same issue with the older Accent models as well.
Case in point I got my header in today. Same issue. No buggy for second O2 and no bolts to join both pieces. I emailed kfx about this, hopefully they learn to fix the issues. bolts are cheap and should be included. O2 sensor is an issue when ordering. If it's an Accent install the second buggy, if it's a Kia, don't worry about it. As for the sizing issue. I'm surprized that it's off by so much. when I got to it was already too late to go to the store for a file or grinding bit, SO the install will have to wait until morning. Header looks good but the fitting issues is the only really headache. The bolts and O2 buggy are just annoying, but not sale killers. As long as KFX fixes the issue.
This post has been edited by Komptek: Aug 28 2008, 01:25 AM
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Sep 23 2008, 12:22 PM
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Member
Group: Members
Posts: 55
Joined: 16-June 05
Member No.: 8,273
Status:
Location: San Antonio, Texas, USA
Drives: 1999 Kia Sephia
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QUOTE(Komptek @ Aug 27 2008, 01:57 PM) I think that since this header has removed the CAT you need to make a small modification to the second O2 sensor. You need to get a second threaded bungy welded to the top of the exsisting bungy. Without this you will get readings that there is a problem. Under normal conditions the second O2 readings are differant the the first O2 due to the CAT being in-between them. Without the CAT it's getting too close of a reading the same as the first O2. By lengthing the bungy for the second O2 sensor you don't have it directly in the exhaust, therefore giving it a read much like it would have gotten if the CAT was still installed. If you look into this ont he web you'll see this is what a lot of cars need to do when removing the CAT between the two O2 sensors. Same issue with the older Accent models as well.
Case in point I got my header in today. Same issue. No buggy for second O2 and no bolts to join both pieces. I emailed kfx about this, hopefully they learn to fix the issues. bolts are cheap and should be included. O2 sensor is an issue when ordering. If it's an Accent install the second buggy, if it's a Kia, don't worry about it. As for the sizing issue. I'm surprized that it's off by so much. when I got to it was already too late to go to the store for a file or grinding bit, SO the install will have to wait until morning. Header looks good but the fitting issues is the only really headache. The bolts and O2 buggy are just annoying, but not sale killers. As long as KFX fixes the issue.
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There are 3 issues here and I will address each The first one is the O2 bung is designed the way we did them on purpose and we will not be changing it. Experience has taught us that you need to place an O2 sensor before and after the remaining cat. It really is not beneficial to place to bungs in the header and so, we did not put one in. I will be adding this info to the website. The second is the holes connecting the header to the cat. We ran into this issue with the prototype and I though it had been corrected. It appears they did not fix it, It is not something we are going to send out to fix, but will correct in future product runs. Currently we have 40 sets left to sell before the new run comes. In the past I have simply made the hole bigger, you can do that or elongate the holes with a file/dremel/pencil grinder. Thirdly, I was not aware that we did not include the bolts, I will list this on the website and this will get corrected when the next production run comes. I am sorry for any inconvenience this has caused. The product has given some excellent results so far and we will make corrections as we go forward. Bill
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