LX AFTERMARKET HEADER and OEM CONVERTER
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My friend and I have the same civic LX 1.7 except mine is a manual, his oem manifold rotted at the head flange so he decided to purchase the inexpensive header from ebay, he installs it without the springs to mount the oem exhaust to the header flange which is how they do it, I personally would try to put the springs back in, anyways, he did not get a check engine light which is cool, and the lower oem 02 bung doesnt have any type of shield or anything like that so why no engine light ? the top 02 bung is on one tube rather than in the middle of the oem exhaust manifold, so my question is, can you remove the material from the oem converter to hollow it out and still not have a engine light ? I know their has to be civic owners with the LX 1.7 that has done this.
Last edited by jdh022764; 12-07-2018 at 08:13 PM.
#2
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Re: LX AFTERMARKET HEADER and OEM CONVERTER
What you have to do with an Lx to avoid a CEL and keeping the car emissions compliant is convert it to an EX exhaust setup. So you buy ex headers and an ex down pipe with converter. You can also have a universal cat welded in place. There is a sticky in the 7th gen section I believe.
https://www.civicforums.com/forums/2...t-diy-faq.html
https://www.civicforums.com/forums/2...t-diy-faq.html
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Not sure how your friend removed the cat and has no check engine light, does his check engine light work?
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There must be something in the design of that aftermarket header that doesn't allow for proper exhaust flow over that second sensor
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#7
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Re: LX AFTERMARKET HEADER and OEM CONVERTER
If the second sensor is not in the exhaust flow it may not trip the CEL. The first sensor is for A/F ratio I believe.
Either way you should get a cat added wither an Ex one or aftermarket.
Either way you should get a cat added wither an Ex one or aftermarket.
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#9
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Re: LX AFTERMARKET HEADER and OEM CONVERTER
Oh I have seen them. They have been selling them on eBay for a long time!!
Does he have an exhaust leak that would cause the exhaust to not reach the sensor?
Hey if it worked for him give it a go!
Does he have an exhaust leak that would cause the exhaust to not reach the sensor?
Hey if it worked for him give it a go!
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I recently had a '03 LX which had an aftermarket header when I bought it. It had an o2 sensor code at first but after clearing it didn't come back until like a month later.
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#12
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Re: LX AFTERMARKET HEADER and OEM CONVERTER
I think you're confused.
is it possible he has a 1.7 ex modle?
the upstream sensor on both lx and ex and is the Air/Fuel ratio sensor. The lower sensor in the cat is the O2 sensor, which has different positions depending on lx or ex.
if his is an ex then the only connected sensor to the header is the AF, which does not read the cat O2 signal.
is it possible he has a 1.7 ex modle?
the upstream sensor on both lx and ex and is the Air/Fuel ratio sensor. The lower sensor in the cat is the O2 sensor, which has different positions depending on lx or ex.
if his is an ex then the only connected sensor to the header is the AF, which does not read the cat O2 signal.
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I think you're confused.
is it possible he has a 1.7 ex modle?
the upstream sensor on both lx and ex and is the Air/Fuel ratio sensor. The lower sensor in the cat is the O2 sensor, which has different positions depending on lx or ex.
if his is an ex then the only connected sensor to the header is the AF, which does not read the cat O2 signal.
is it possible he has a 1.7 ex modle?
the upstream sensor on both lx and ex and is the Air/Fuel ratio sensor. The lower sensor in the cat is the O2 sensor, which has different positions depending on lx or ex.
if his is an ex then the only connected sensor to the header is the AF, which does not read the cat O2 signal.
Last edited by jdh022764; 12-14-2018 at 03:46 PM. Reason: add a picture
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