black smoke

ive been having black smoke coming out of my muffler for some time now i was just wandering what it could be from. i thought it might be a bad o2 sensor making my car run too rich or something but i installed a new one and its doing the same thing. when i took the old one out there was black carbon shit all over it. anybody now whats wrong? and if i installed a new 02 sensor do i have to like reset the ecu or something?

and also ive notice theres kind of like muffled popping noises coming from my muffler as well.

black smoke is running rich. do you have any check engine lights ?

also list your mods

no mods just a cold air intake but it was doing that before i put it on

Check the O2 sensors wiring.

its all connected

reset your ecu... pull hazard and ecu fuses from under hood fuse box for 30 seconds, put back in and start car and let idle without touching anything. Let idle for at least 5 min., cut off car, then start it again and drive it.

would i automatically notice a difference?

most likely

definately running too rich, been there before :) a new o2 sensor usually fixes the problem, if not then maybe u have a problem with ur ecu

my car dose that when i race (floored at 4,5,and 6k rpm) i reset my ecu, got an o2 and i only have a short ram no matter what i do it always dose that...if you notice ...hondas run rich in general.

my car dose that when i race (floored at 4,5,and 6k rpm) i reset my ecu, got an o2 and i only have a short ram no matter what i do it always dose that...if you notice ...hondas run rich in general.


yes they do, my bone stock d15b2 ran rich as hell, made me fail my e-test tons of times untill i paid the guy off haha

could be o2, could be iat

My car has always done the same damn thing since I've had it. I am sure it could also be my o2 but I dont think thats the prob. I've never had an o2 sensor code come up on my ecu cept for when I installed my mpfi recently but taht went away after I timed the car correctly. What I want to know is if there's a way to adjust my a/f so its not running rich without buying some expensive electronics that is.

fpr

fpr
Who makes a good one?