header on d16 y7 - D-series.org

mr man · 04-16-2006, 10:44 PM

okay so i just picked up a used header for my d16 y7.

just have a few questions before i decide to put it on. For one i have a 99 civic hatch so i am obd2 and this header only has a hole for one o2 sensor. Also the stock cat is built into the manifold.

so basicly what would be the ideal way to set this up?

i know one option would be to just bolt it up and hook the header right to my mid pipe and leave it with no cat and only have one 02 senser pluges into the top. Im guessing this will cause my check engine light to be on but just wondering how it will run like this.

What other options would you guys suggest?

4drturboD · 04-17-2006, 10:55 AM

you can get an o2 simulator but i don't know how well they work. i 'm running no cat but my header takes both o2s no real issues

mr man · 04-17-2006, 01:43 PM

does your check engine light come on at all?

04-17-2006, 05:08 PM

i have a o2 on my header and then one after the cat, no lights at all, and if the o2 ligh is on than your ecu will tell your car to give it more gas meaning it will run fine(well you wont notice until it comes to your pocket money) but you will lose gas quick...i have no cel..

SpoolinSingleCam · 04-17-2006, 06:30 PM

If you do this and run it without the cat and 2nd o2 sensor, it will throw a code for it and possibly run in basemode (dont know for sure on this). All obd2 cars will look for the second o2 which tells the ecu the cat is working properly (ie. filtering your exhaust), so without it the CEL will come on. I say try it and see if it really messes with your tune with a cel, the power gains from this most likely wont be huge on a y7 but every little bit helps NA.

mr man · 04-17-2006, 08:23 PM

Quote:

Originally Posted by tphitterlude92

i have a o2 on my header and then one after the cat, no lights at all, and if the o2 ligh is on than your ecu will tell your car to give it more gas meaning it will run fine(well you wont notice until it comes to your pocket money) but you will lose gas quick...i have no cel..

You must have y8 or other motor because the d16 y7 had the cat built into the exaust manifold.

Anyways though i got the header installed and i just hooked up the one o2 sensor and am running with no cat right now. the check engine light is on but i expected that anyways. i would just really like to know what my ecu is doing to my engine by having my check engine light on.

On the good side i took it for a quick boot and noticed a HUGE gain....and i still have my stock airbox and exaust piping so i cant wait to free all of that up.

Hellhatch · 04-17-2006, 08:44 PM

Quote:

Originally Posted by 4drturboD

you can get an o2 simulator but i don't know how well they work. i 'm running no cat but my header takes both o2s no real issues

I have a 00 hatch with a 02 simulator that has been on the car for 2 years and its seen 2 new jersey winters worth of salt and crap and i have no problem with it. When i hook up my obd2 diagnostic with the laptop it show that my cat is functioning properly and i dont have one it fooled the dmv. Its just a resister in a box that sends the correct signal to the ecu that your cat is working properly. And there is no check engine light unless you wire it wrong.

mr man · 04-17-2006, 08:57 PM

really? thats great to hear so your running a header with only one o2 sensor pluged in physically and the second one is "supposidly" pluged in because of this chip? Where did you find this thing and was it pretty easy to do.

also how did you like the gains of your header? im very impressed i noticed a big difference.

4drturboD · 04-18-2006, 12:49 AM

i knew the o2 foolers worked just didn't know what kinda reliability to expect. thanx for clarifing.

i think i've seen them online from reputable dealers for between $40 and $55.

hellhatch, where is yours from? i have a friend that needs one as well.

p.s.- i only get intermittent codes, my light only comes on sometimes and doesn't affect performance when it does. when scanned it says something to the effect of "catalyst system below threshold" i believe.

mr man · 04-18-2006, 12:58 AM

so right now when i just have the one 02 sensor hooked up and no cat is this bad for my engine or making it run at less then its capable of?
the engine light had been on perminant since i put in the headers

04-18-2006, 05:50 PM

actually i have a Y7 not stupid just never posted on here...and i have a cat on right after where after the header...soon to be getting a test pipe...

04-16-2006, 10:44 PM	#1 (permalink)
mr man n00b iTrader: (0) Join Date: Apr 2006 Posts: 6 Rep Power: 0	header on d16 y7 okay so i just picked up a used header for my d16 y7. just have a few questions before i decide to put it on. For one i have a 99 civic hatch so i am obd2 and this header only has a hole for one o2 sensor. Also the stock cat is built into the manifold. so basicly what would be the ideal way to set this up? i know one option would be to just bolt it up and hook the header right to my mid pipe and leave it with no cat and only have one 02 senser pluges into the top. Im guessing this will cause my check engine light to be on but just wondering how it will run like this. What other options would you guys suggest?

04-17-2006, 06:30 PM	#5 (permalink)
SpoolinSingleCam D-series lover iTrader: (5) Join Date: Nov 2005 Location: Raleigh, NC Posts: 118 Rep Power: 8 View My Photo Gallery	If you do this and run it without the cat and 2nd o2 sensor, it will throw a code for it and possibly run in basemode (dont know for sure on this). All obd2 cars will look for the second o2 which tells the ecu the cat is working properly (ie. filtering your exhaust), so without it the CEL will come on. I say try it and see if it really messes with your tune with a cel, the power gains from this most likely wont be huge on a y7 but every little bit helps NA. __________________ rock out with your sohc out Edelbrock turbo'd y7/y8 Mini-me @ 9psi Parting out - back to stock sale!

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04-17-2006, 01:43 PM	#3 (permalink)
mr man n00b iTrader: (0) Join Date: Apr 2006 Posts: 6 Rep Power: 0	does your check engine light come on at all?

04-17-2006, 05:08 PM	#4 (permalink)
tphitterlude92 Guest Posts: n/a	i have a o2 on my header and then one after the cat, no lights at all, and if the o2 ligh is on than your ecu will tell your car to give it more gas meaning it will run fine(well you wont notice until it comes to your pocket money) but you will lose gas quick...i have no cel..

04-17-2006, 08:57 PM	#8 (permalink)
mr man n00b iTrader: (0) Join Date: Apr 2006 Posts: 6 Rep Power: 0	really? thats great to hear so your running a header with only one o2 sensor pluged in physically and the second one is "supposidly" pluged in because of this chip? Where did you find this thing and was it pretty easy to do. also how did you like the gains of your header? im very impressed i noticed a big difference.

04-18-2006, 12:58 AM	#10 (permalink)
mr man n00b iTrader: (0) Join Date: Apr 2006 Posts: 6 Rep Power: 0	so right now when i just have the one 02 sensor hooked up and no cat is this bad for my engine or making it run at less then its capable of? the engine light had been on perminant since i put in the headers

04-18-2006, 05:50 PM	#11 (permalink)
tphitterlude92 Guest Posts: n/a	actually i have a Y7 not stupid just never posted on here...and i have a cat on right after where after the header...soon to be getting a test pipe...

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