need help-----running to lean b/c of exhuast system

[eclipsetsr2]

i have resently put on a hi flow cat with a 2inch cat back exhuast system everything was working great untill i thought it was time to put on 4-1 header. before i put the header on my air/fuel gauge work like i would suppose to, but when i put my header on.......the gauge stays in the lean..........does this mean i am running that lean or does that mean sence the header put the o2 sencer in a different spot (not much diff from stock position) it just reads wrong. i know it is bad to run lean but i would really like to know if any one out there in the dsm world would know what i should do. i was also thinking about putting my stock manifold back on to bring it back to normal but i dont want to do that if it not the problem. but if any one knows please let me know what i should do. thanks

 

[boostdevil]

this is such a knoob question, but hey i guess thats why its here right! anyways i am guessing you have the autometer air/fuel (lightshow) gauge, and if so let me tell you that it does nothing for you and your car except make lights move around, its not accurate at all, and just by putting a header and exhaust on a non turbo eclipse i dont think you have to worry to much about running lean or rich, you should be fine

 

[doodie]

this is such a knoob question, but hey i guess thats why its here right! anyways i am guessing you have the autometer air/fuel (lightshow) gauge, and if so let me tell you that it does nothing for you and your car except make lights move around, its not accurate at all, and just by putting a header and exhaust on a non turbo eclipse i dont think you have to worry to much about running lean or rich, you should be fine

^^^ True story. Also can probably be that you destroyed your O2 sensor.

 

[Drifter00]

I would agree, you probably messed up the 02 sensor and now your getting a lean reading on the gauge. However, the gauge is usless anyway, so who knows.

 

[eclipsetsr2]

i know that the gauge isnt 100% accurate but then would i go from 240-250miles per tank to 170miles to a tank....would that header also cause that?

 

[2gGSX]

That'd be the O2 sensor. Might've damaged it

 

[eclipsetsr2]

i tried to reset my ECU like i was told to try to see if i could get the senser back to normal but nothing worked so i am thinking that it is the senser too.......any one know where the hell i can get one before my car ####s up even worse????? let me know guys

 

[David15151]

There are multiple options for getting an O2 sensor.

1. Ebay
2. Local Part Store (discount auto) (Autozone)
3. DSM Online Part Stores such as http://www.machv.com/denoxsen.html

Depends on how much money you want to spend , availability, and how fast do you want it?