LuckyLad

I just put on my ceramic header and hi flow cat with stock exhaust(on its way) and me CEL (Malfunction Indicator Lamp) has come on and its not going off. I read in the manual that it can damage the ECU and fuel engagments. IS there anything i can do? Please help!

Kloverz

iTrader: (1)

ill tell you almost everyone will tell you it been covered million of time search!!

Project2k2

iTrader: (3)

MIL eliminator from http://www.bigjoshracing.com or get and o2 sensor (recommended) from wannabfast <---a member here.

LuckyLad

i've read about the o2 sensor similator but iwas wondering of there was any thing else.

djmota

iTrader: (34)

the only other thing would be to put your stock cat back on.

acidbaby

iTrader: (15)

did you already put on your "high flow cat"?
if so what kind is it? most are not really high flow they are straight through resonators.
and if you do have the high flow on then you are not getting the weird fuel map. that comes on from the first o2 sensor not the second one.
the cel you are getting is normal.


another thing you could check is that little button on the home page called the search button it works very well in this situation

Jodster

iTrader: (8)

You just need a o2 simulator man. That will fix it.

acidbaby

iTrader: (15)

ive had the light on for 3-4 months now and no problems to lazy to get the sim i guess

WannaBFast

iTrader: (16)

well o2 sims do the same thing as MIL eliminators... actually.. they are the same things pretty much
altho, my design has been tested for 7thgen EX models.. and one lx/dx model
ive had mine in since september or so.. and no CEL.. altho im running catless

acidbaby

iTrader: (15)

me too lol @ catless

LuckyLad

the cat is catless, just a resonator. i have noticed more than anything else that in 2 days i have gone through more gas than i would in a week, almost half tank. is it the sensor before or after the cat that causes the MIL light to come on, and where does the simulator go? and WANNABEFAST, how would i go about getting one of them simulators.

acidbaby

iTrader: (15)

^^send him a pm
his sim goes on the ecu!
the sensor b4 the cat is what causes the sketchy fuel map.
ask wannabfast he will answer all your questions!

TypeRCivicBoi19

iTrader: (1)

I've had a header on my HX for almost a year and that light has been on ever since. I just ordered a hi flow cat too. Is my ECU getting messed up?

HondaLuver

iTrader: (17)

get it done by a professional next time... or get a cat with a 02 sensor input... ibtl for being covered a million times...

DistinctiveBP

iTrader: (5)

typerboi your ECU thinks something is wrong with the Air/Fuel ratio so its doing what its programmed to do to make up for it. Just get the o2 simulator or leave it. My CEL has been on for a long *** time, and my car is fine.

LuckyLad

So whats the difference between the O2 sim VS. the MIL eliminator. it sounds lik the Mil Elim simply just keeps the light from coming on and that the O2 sim actually makes the car believe there is a cat. is this true. Oh ya, is my gas milage down the tube now with the straight thru cat?

cdmx

iTrader: (7)

im lazy too....no problems here

Project2k2

iTrader: (3)

Well, the CEL does effect your performance. If you wait about a week, I will have a DIY on how to remove the o2 sensor completely, becuase that's how my car is running right now, without the CEL on.

cdmx

iTrader: (7)

Is it really affecting performance??

Cause my car pulls harder now....what are you trying to say its not pulling as hard as it should?

bickford05

iTrader: (3)

If you want an o2 sim, I have one that i never installed. Pm me if your intrested

cdmx

iTrader: (7)

I just asked some ppl from a shop, and they say it doesn't hinder performance nor does it affect the ECU....i mean if the CEL comes un under normal driving conditions than that would probably affect stuff

Project2k2

iTrader: (3)

When the CEL comes on in our cars because of the header, the o2 sensor isn't getting the right voltage, which means it's recieving a wrong reading. This wrong readuing triggers the ECU to go into action and put less fuel into your engine in hopes that it doesn't "blow up". So yes, your car may be pulling harder but definately not as hard as it can. When I installed my header I went from 16.01 to 16.3's all day. Now I have it off, I'ma head down to the track and see what I can't pull off.

LuckyLad

i just purchased the O2 Sim. mainly because i can't stand that light but also because i know our ECU isnt just going to sit back and do nothing as its getting some crazy reading, such as no CAT present.

LuckyLad

i just still feel very uncomfortable tapping into my ECU. will any of the void my warrenty? I'm sure it does,Stupid question. but will it?