Jcelli04

I just noticed that i have black deposits in my tailpipe. I have 3 guesses at what it might be so can ya help me out here

1) car is running lean
2) car is running rich
3) its just like because there are no cats

any help will be greatly appreciated

dandragonrage

It's normal, as long as there isn't a whole lot. Having no cats will probably make it worse, though I am not positive about that.

mustang_montana

its normal. unless your plugs are really black, your probably not running rich.

wwmost

happens every time i drive that car. cant keep them clean. specially if i go wot. my car is tuned and its running right soo its normal. i think its cuz there are no cats

Jcelli04

i figured it was somewhat normal, but i just wanted to be sure.

im guessing that all of you without cats smell gas a little too...thats what makes me think its running lean

joeybutts

If your smelling gas that would be rich i think.. lean is lots of air/little gas, rich is lots of gas/little air....(in general i think)

RiCe_KiLlEr

stock from the factory our cars are made to run rich, so w/o cats you will smell gas and get black deposits on your tailpipe. i had the same problem and now my exhaust is dumped so you cant see the black deposit. but i definately smell the gas fumes. DYNO TUNE next week

72MachOne99GT

Try having 4" Rolled Stainless Stell tips sticking out the back on an uncatted midpipe. Then you'll really get black deposits/brown stains EVERYWHERE.

Since the tips are rolled, anyone within 25 feet can see the stains too. Go from about 9 o'clock to 3 o'clock all over the rolled edge.

If you have stock pipes, or something that is'nt stainless steel. But if you're worried about cleaning them effectively, try using Eagle One Never Dull. That, along with some scraping from the fingernail shines them back up nicely.

(I do believe some members use paint thinner/nail polish, but I would hesitate since most tailpipes are kind of close to the painted rear bumper)

wwmost

paint thinner FTW!!!