| Author | Topic |
|---|
Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
|
|
puzziling engine smoke prob.
|
Sun, 22 August 2004 12:07
|
 |
Ok i have a weird smokey problem thats causing me a headache (it really is.. fumes get to me big time!) i drive my ae86 every day and on the way to work it is fine, drives no worries and no smoke. When i drive home tho (without driving it all day) there is white/grey/blue smoke coming from the exhaust on trialing throttle only, oh and when pulling up to the lights.
same as today, i drove around for an hour or so, got it well and truly up to temp, parked it for another hour then drove around for a few more hours, soon as i started driving it after i had parked it i noticed it started smoking a lot again. esp when crusing at low speeds with very light throttle in say 3rd gear @ 30-40 kph. pours out the smoke to the poor car behind me.
FUCKED if i know what it is but when i did an oil change i noticed that my "oil" was 90% fuel! it reeeeeked of it and was runny as water.
changed the oil to a 15W 40 and instantly no smoke. but its slowly been building up.
i feel that the smoke is excess fuel washing oil off the bores.
now.. comments/thoughts all appreciated pls.
Its a CA18det with stock ECU, rb roller turbo and 0.6 bar boost, front mount, exhaust and thats it. does NOT blow smoke on accel or full load, pulls hard and clean also.
|
|
|
Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
|
|
Re: puzziling engine smoke prob.
|
Sun, 22 August 2004 23:46
|
|
|
come on guys, help would be appreciated
|
|
|
Location:
Terrigal
Registered:
May 2002
|
|
Re: puzziling engine smoke prob.
|
Sun, 22 August 2004 23:51
|
|
Would it be possible to get someone with a wideband 02 meter to measure the mixtures? Just so you know if its a fueling problem or not?
I had a similar problem when I wired up a 5ME engine and had one of the AFM wires arse end about and under certain conditions it would run as rich as hell, but then under different conditions it ran sweet.
|
|
|
Location:
south east - melbourne
Registered:
March 2004
|
|
|
Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
|
|
Re: puzziling engine smoke prob.
|
Mon, 23 August 2004 09:10
|
|
im thinking it may be excessivly rich and washing the oil off the bores (and finding its way into the sump)
plausable?
|
|
|
Location:
Baulko Hillo
Registered:
April 2004
|
|
Re: puzziling engine smoke prob.
|
Mon, 23 August 2004 09:40
|
|
| indian wrote on Mon, 23 August 2004 13:05 |
PISTON RINGS
when the oil thins out after gettin warm they seep through the worn rings when the car is parked and next time u start it pufffffffff
clouds of smoke
thats what i think , correct me if im wrong
cheers
|
Wouldn't gravity cause it to drain straight back into the sump when the car is parked? The oil would have to go up around the rings to enter the combustion chamber unless it is coming from the head and this seems impossible if it was static.
This happening while the engine is runnng is a completely different story, of course.
|
|
|
Location:
Land of Oz
Registered:
June 2004
|
|
Re: puzziling engine smoke prob.
|
Mon, 23 August 2004 09:51
|
|
Hi,
Sounds like the piston rings to me also. It wont seep down with gravity 'cos we're takling about a few thou of an inch gap, not a gaping hole. Under load and cylinder pressure it may force the stuff through the rings.
In any event, if your oil is getting watery then its losing its viscosity and therefore not providing the necessary protection for your engine.
You also said blue/white/grey smoke? Usually blue smoke is oil and the whitish stuff is fuel.
seeyuzz
river
|
|
|
Location:
Baulko Hillo
Registered:
April 2004
|
|
Re: puzziling engine smoke prob.
|
Mon, 23 August 2004 10:14
|
|
| indian wrote on Mon, 23 August 2004 13:05 |
seep through the worn rings when the car is parked
|
I think I took this a bit too literally 
|
|
|
Location:
Adelaide
Registered:
July 2004
|
|
Re: puzziling engine smoke prob.
|
Mon, 23 August 2004 10:26
|
|
Car smokes
If you notice smoke, these are the most likely causes:
- Black smoke means the engine runs very rich (too much gasoline goes to the engine), which most likely means there is something wrong with the fuel or ignition system. For example, this may happen when one or two cylinders misfire.
- Stinky blue or white-blue smoke indicates burning oil as a result of internal engine defect.
|
|
|
