ive been doing some research, theres been some black substance that shoots out of my muffler, i have yonaka catback exhaust on a 95 civic ex, what could cause this? some sites say i need spark plugs? but i really dont know, let me know what you guys think.

 

That's just excess fuel.

 

is there anything i can do to stop it? cause my muffler gets it all over the outside of it.

 

usually its just condensation that mixes with the soot in the pipes. but put our fingers on the stuff on the ground and smell it. smells like fuel then you need to look deeper into whats causing it.. if it doesnt smell, then your fine

 

everyones ive seen online their exhaust is pretty clean inside then you look at mine and its black inside like deep black, also i have a leak on my engine a honda mechanic told theres a leak in my cam seal, could that be the issue?

 

the black means your burning rich.. could be fuel or could be just excess carbon.

no, the cam seal has nothing to do with your exhaust.

sounds like you have alot of maintenance to do

 

yeahh, would i be able to replace that cam seal myself?

 

You can do anything yourself! Just takes time and money. Oh and some tools

 

Cam seals are a joke. If you can replace a valve cover gasket, you can replace a cam seal.

 

try seafoam before all of above

 

check your plugs and look into a full tune up. FULL TUNE UP new oil change/pcv valve/ plugs and wires/fuel filter/ a bottle of lucas injector cleaner/ valve lash adjustment/ clean your iacv.

 

 

when my tps and iac both went out i had the same problem my car shot alot of black stuff out my muffler i replaced them and it went away i hated cleaning my car just to get home and have more carbon on my bumper

 

dont forget experience, know how, and common sence..

 

ehhhhhhhhhhh no.

 

do yourself a favor and search about seafoam......before taking this advice.
alot love it
alot hate it tho

 

This is also caused when your burning oil, but your oil would show it and usually you would see black smoke at points too.

 

ehhhhhhhhhh no

 

Well an old chevy we had burned oil bad...we had to replace the piston rings..and black smoke on throttle was the main indicator in that case...along with a sludgy black soot all over the end of the pipe.....When we replaced the rings the smoke was gone and the soot never returned(after cleaning)....so.......

 

Dc2012 please dont touch your car.... Black soot is a sign of rich (To much fuel) and white/blue smoke is burning oil... Both can leave soot in your exhaust pipe but comming from exhaust is fuel.

JChope... You had to clean your bumper just to get home.... wtf

 

What happened with your situation is your Chevy was running rich (black sooty smoke)
Your ring seal and rings and bore was washed down with fuel and washing the oil of your cylinder walls and burning that oil out of the combustion.
There for ruining the rings/ringseal, and burning all of that cyl wall oil out the pipe with it.

This all could have been avoided by having a properly jetted/tuned fuel delivery from the start

 

To inform you that what happens to a Chevy isn't gonna be the case for a Honda. It may or may not be but more than likely not.