hey guess my exhaust really smells and throws black smoke when im in neutral it smells bad im straight pipe but its never been this bad i have i/h/e intake manifold and chipped ecu have recently been added did a tune up but it didnt help what can it be???i recently had water in my oil and drain it out car headgasket didnt go bad its because wrong hose connection help me out guys??

 

MAYBE your car is burnin oil which could be piston rings do u have soot on ur rear bumber?

 

yeah i think its the piston rings too

 

i also have a idle problem and it goes stable the exhaust dosent throw the smoke anymore??how can i check if its the rings?

 

the car is not loosing oil it smells like gas and the exhaust smells like gas too but when the idle is where its soppose to be it disent do it bad can it be a vaccum leak or a bad aicv???

 

hmmm possably to check rings i think u have pull the head off and vac lines idk check all ur fuel lines and hoses and check for leaks weather id be air or fluid

 

can a leak cause this or a bad aicv??

 

depends on how bad the leak is u could just have a loose connection or none at all

 

for sure i know i have a bad aicv!!so what where would i start??

 

a bad iacv, or a clogged or dirty one, would not cause your car to have black smoke... it WOULD however cause your car to idle very jumpy, or rough. Could cause it to bog as well. There are 2 bolts, take those out, 2 hose, take those off, clean it with carb cleaner, let it dry, very lightly lube it with silicon or wd40... put it back on, see what happens.
Before u do that, battery... b4 u do anything electrical pull ur battery.
but if you say it blows black smoke in neutral sometimes, and sometimes its fine... i doubt it is internals in your block or head... especially when it will be fine sometimes and not, do a run down of your car.

 

correct me if im wrong but wouldint a bad o2 sensor cause black exhaust smoke? my buddy had a bad o2 sensor on his golf vr6 and that thing had the batman smoke screen going on lol, that was untill he put in a new o2 sensor. i know that they are 2 VERY diffrent cars but it could be the problem..

 

alright got it checked by a mechanic the car is not leaking gas and the car runs fine no power loss he said it not burning the gas right i have a gas like odor smell he and a little gas in my oil he said u might have a bad injector because i just change my spark plugs two days ago and they are already black and smell like gas he said to just run that way and see if i have any problems like power loss and shaking cuz the injector might just be going out what u guys think hes right or might be something else??

 

black smoke could mean your running rich aswell, is your catalyic converter functional or are you running straight pipings

 

I agree with fhukingviet, your probably running too rich. You have your ecu chipped, have you tuned your air to fuel ratio afterwords?

 

You obviously are running too rich if you are smelling unburnt fuel, What is your ecu chipped for? You most likely need to get it tuned.

 

yeah my ecu is chipped its just a basic tune a little more gas vtec kicks in harder and im straight piped it cant be the cat so what do i do then get it tuned again???will it mess my car up running it like that?

 

how do u tune ur air to fuel ratio?

 

get a wide band, datalogger cable , crome and freelog, not soo simple

 

Find a tuner close to you, take your car there.