Ok I was excited that my new dc headers HHC5018 arrived today. I opened it and the instruction says "this header is not intended to be used on any ULEV engine"
That means in screwed?? Can't install the header?
Or is it fine to install it?
I have 98 accord 4 cyl. F23a4 engine
Your computer runs the air/fuel mixture. The ULEV motors run lean, so it is pumping less gas into the motor, it allows cleaner emissions while saving on gas. When you increase the flow rate of the exhaust, the computer responds by running leaner, so you'll be running even less gas. Which could be harmful to the engine. So if you want to run the header, you will most likely need a tune to run the proper air/fuel ratio. You can probably pick up an A/F controller to handle this instead of a chip and tune.
Ok I was excited that my new dc headers HHC5018 arrived today. I opened it and the instruction says "this header is not intended to be used on any ULEV engine"
That means in screwed?? Can't install the header?
Or is it fine to install it?
I have 98 accord 4 cyl. F23a4 engine
It's not intended but that doesn't mean it can't. Fitment will be correct.
Other than the fact that you are going to get around 3-5 HP more power if that, you can install it and see what happens. Hopefully, there are oxygen sensors, a.k.a. O2 sensor, bungs (opening to screw a sensor into) in the header in similar locations as your OEM exhaust manifold and downpipe. If not, you will need to bring your header to an exhaust/muffler store and they can weld in the bungs for you.
Don't install a Vortec Cyclone (Tornado Air) air-intake funnel into your intake, you're going to hit 5,000 HP and that's going to hurt your header.
so I put the dc header on, it did come with an o2 sensor bung. but after 1 day my check engine light came on and it was a P1164 code which is bad primary o2 sensor? correct me if im wrong. I cleared the code and CEL hasn't come back on yet.
does that code says for sure that its a bad o2 sensor? or could it be because im running lean after the dc header was installed as you guys stated above?
also, can a bad cat. converter gives me that code as well? the reason im asking this is because I know my cat. converter is bad. its broken inside. I saw like a cube that got loose in the cat converter while putting on my header. its like a rock inside a coke can, when you shake it makes a rattle noise.
also, I replaced a new primary o2 sensor about 2 years ago.
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