smoke, smoke and more smoke

[hong_ung]

hey guys

the other day i had a bit of a fang whilst my friend was driving behind me
and every time i opened the throttle, greyish smoke would come shooting outta my exhaust

Is there a problem witht the car?
Its got a 2.5 inch catback zorst and diy cai

I change the oil and filter every 5000kms and recently changed the fuel filter

Cheerz guys

[bennyBear]

sounds like you might have a gasket issue, i'm having the same problem, try a 'stop-smoke' solution, makes a bit of a seal on the gasket, you can get them at any car retailer, supercheap, autobarn, repco etc.!

has worked on my car for the time being!

[tinkerbell]

hong,

every time, or just a couple of times?

what did it smell like?

what fuel do you use?

have you pulled the EUC fuse recently to reset it?

[Illegal]

it could be: piston rings going, valve seals/seats, or retainer/valve guides. I'm tackling this $10,000 investment/nightmare myself. Next on mon. is to buy a new head. (now that the block is redone.)

[tinkerbell]

wow, you can diagnose that from 'greyish smoke'?

you're good!

[**Ghost**]

i'm going to give u a VERY layman and basic suggestion... did u by mistake by any chance put too much engine oil in recently???

[bennjamin]

what "R" do u have ? DC2 or DC5 ?

Seems to be quite normal for our lil hondas to blow alittle smoke under WOT.
AFAIK its from excess fuel being burnt at WOT.

[aznsiko]

could be many possibilites... probly best if you get it checked out by a mechanic or something.. but yeah... i dont think its your piston rings or anything because normally oil buning puts off blue smoke not grey..

[D16Y]

what "R" do u have ? DC2 or DC5 ?

its a dc2r

[Boy_Integra]

i'm going to give u a VERY layman and basic suggestion... did u by mistake by any chance put too much engine oil in recently???

:thumbsup: My theory too..

My LS is my life..

[nisi]

I reckon ur piston rings may be on there way out too..

[geo41e]

err...grey smoke isn't piston rings....

burning oil is blue ain't it ??

[altin]

I'm having the same issue.. but apparently its common... if its a head gasket issue wouldnt the smoke be white? Its its too much oil wouldnt the smoke be blue?

[rtype]

How Many Thousand Kilometer have you done on the engine????? What Oil do you used? and try you check your engine old weekly to see it comsump oil or not? it could be your Valves stem.

[altin]

I have 83k on my car.. use motul oil. I've done further research and found that its the ECU that puts in more fuel right before WOT to make the car run richer for that time rather than making it run lean. So Its burning excess fuel.. What a relief.

[THE_MASS]

WOT???
please explain?

[tinkerbell]

Wide Open Throttle

have a go here first next time:

http://www.ozhonda.com/forum/search.php?

[altin]

Hey guys... just for future reference... this is where I got my info from.

http://www.honda-tech.com/zerothread?id=613711

[Illegal]

oil consumption is right. A quart between oil changes with hard driving on a honda is ok, but if it's a quart after every fuel fill up, then their is a problem.

[tinkerbell]

and what exactly is a 'quart'?

[Da1nONLY]

i think he means "quarter" =P

[Illegal]

and what exactly is a 'quart'?

one bottle of oil

[tinkerbell]

i think he means "quarter" =P

of what?

a litre?

still no help unless we know what it is a 1/4 of Da1nONLY...

[tinkerbell]

a bottle of oil = 5 litres,

so are you saying it is OK to lose 1.25 litres of oil every 5000km????

[tinkerbell]

<--- crying out for some METRIC sanity!!!!!!

[Illegal]

ok, I've been in the U.S. for tooooooo long. We put in 4 1/2 quarts of oil in a b series for an oil change. Now during 3,000 miles or a bit more, loseing 1 quart is acceptable if the car is not stock any longer.

[tinkerbell]

ok.

[dc2r]

yeah i thought a "quart" was a different measurement from metric... its a standard measurement right? so a quart doesn't mean a quarter at all... haha...

[Da1nONLY]

haha

damn im such a bad guesser =P

[micka]

yeah i thought a "quart" was a different measurement from metric... its a standard measurement right? so a quart doesn't mean a quarter at all... haha...
quart = quarter of a gallon, doesn't it?

[Da1nONLY]

quart = quarter of a gallon, doesn't it?

YEs it means a quarter of a gallon..
Quarts - a traditional unit of volume, so-called because it equals exactly 1/4 (one quarter) of a gallon. However, there are several possible gallons to consider: [i] in the U. S. customary measure system for liquid volumes (such as milk, for example), one quart is exactly 57.75 cubic inches, 32 fluid ounces, or approximately 0.946 3529 liters; [ii] in the U. S. customary measure system for dry volumes (pecans or strawberries, for example), one quart is 67.201 cubic inches, or approximately 1.101 221 liters; [iii] finally, in the British imperial system, used for both liquid and dry commodities, one quart is 69.354 cubic inches, 40 fluid ounces, or exactly 1.136 5225 liters. In all cases, the quart equals 2 pints.

There ya go =P...
i was half right....

[hong_ung]

hong,

every time, or just a couple of times?

what did it smell like?

what fuel do you use?

have you pulled the EUC fuse recently to reset it?

Sorry guys i avent been on the net lately

I think its everytime i WOT
but i never hit the car whilst its still cold
dunno what it smells like , and use BP ultimate
i havent pulled any EUC
could it be the AF ratio?

[hong_ung]

hey guys i my l level is fine
Im gonna take the car to the track in sept n looking into gettin a full service done before then

[tinkerbell]

yes, i would suggest it is not oil like mentioned above, but fuel,

so if you can smell it it would give you a better idea,

you should reset the ECU* first before anything else

(pull the "backup/radio" 7.5A fuse from the fuse box in the engine bay for about 15 seconds - you will lose your radio stations etc)

this will set the 'long term fuel trim' A/F maps back to factory as the ECU may have 'learned' to run richer due to your airflow modifications...

i hope that this will solve the problem...



* sorry i meant to type ECU first time instead of EUC, :dumb:

[hong_ung]

hahah
i was like damn..ill just pretend to know wat an EUC is...til i figured it out LOL

[superR]

dun worrie bout it man .... i recently got my v-afcII in my DC2R tuned by toda AU ( adrian), i ask what all the smoke was from and he said not to worrie bout it.

[Illegal]

it all depends on how much smoke, when it comes out, and how much oil you lose. WOT there will be some, but if it's bad, and your always topping off the oil, it's prob. the rings going. If you decelerate and get a huge puff of smoke it's valve seals/seats or guides.

[civtir]

I get grey smoke coming out of my car and i service every 5000kms......alot of my friends also have vtec cars and i've noticed they all get it wen they fang it....i dun see a problem with it....as long as i ain't travelling behind!!

[tegraa]

when you push a car, dont you feed more fule to the engin?

[tegraa]

All that fuel has to released somewhere too? May exhaust emissions?

[tinkerbell]

it needs to be balanced with the air that is used by the engine too,

engines dont run on only fuel, they run on air and fuel.

it needs to be balanced.

too much fuel for the amount air = rich

too much air for the amount of fuel = lean

soooo, when you modify the car with air flow improvments like intake, headers and exhaust, you increase the 'air amount' so the car runs lean...

the ECU computer senses this and over time adjusts the 'fuel amount' to compensate,

in most cases the ECU computer will over compensate with fuel to be 'safe' and this leads to problems as described.

[Illegal]

lean to a point = more power though, but you have to worry about detination.

[chan]

if u doubt it is oil, then do a compress test (leak test and oil test).

[steve]

if it is black smoke then this is prob ok
If bluey grey or white smoke then u got troubles...

Black smoke indicates excess fuel in combustion chamber, whick is ok to a point.
Side affects - loss of power, lots of soot, increase fuel consumption,

Blue smoke indicates there is a OIL leak sumwhere around combustion chamber ie vavle stem seals, piston rings etc. EXPENSIVE

White smoke is caused by coolant being present in combustion chamber, normally caused leaking head gasket
I would be guessin in saying when vtec ingages, honda would program ecu to deliver more fuel, prob more than what is needed so detonation does not occur, meaning when vtecing a little black smoke prob means ur engine is runnin safe:)

[chan]

correct me if i am wrong. i think black smoke means the fuel is too rich, white smoke means burn oil and blue smoke means coolent leak into the engine.

[steve]

blue smoke def oil dude, white smoke can also be caused by unburnt atomised fuel;)

[tinkerbell]

correct me if i am wrong. i think black smoke means the fuel is too rich, white smoke means burn oil and blue smoke means coolent leak into the engine.

you are wrong.

[hong_ung]

Hey guys
i realised tyhat the smoke only happens sumtimes
im thinking its the AF ratio aswell
ill prolli get hannys to reset it whilsti get my full service dun
thanks for the info guys

[Illegal]

Black smoke indicates excess fuel in combustion chamber, whick is ok to a point.
Side affects - loss of power, lots of soot, increase fuel consumption,

Blue smoke indicates there is a OIL leak sumwhere around combustion chamber ie vavle stem seals, piston rings etc. EXPENSIVE:)

This is what I'm going through now. I just redid the block from bad rings and a spun rod bearing, and now I'm buying a new head.