TheLooch

Hello All,

My 997s had been sitting a while... I needed to use a jump to start it and when it fired up it was blasting white/blue smoke everywhere... I let it idle for about 15/20mins and the smoke never subsided... Just keep pouring out. Any idea of what is causing this?

Thanks!!

Steve

neanicu

Since it's been sitting for long I wouldn't jump to serious conclusion as to what white smoke is associated with...
My vote goes to stale gas. Fill up with fresh gas and I believe you'll see a lot of improvement.

stronbl

How long is "been sitting awhile", months? And what is the model year - is it a 9A1 engine? Any oil leaks from where it was sitting - ground and engine?

Assuming the time has been months since it was last started, and there are no visible oil leaks on ground or around engine parts, and it is a 9A1 engine, then a first guess is you have some lingering/settled oil that will eventually burn out. If it is a 9A1 engine, and although they are marketed as dry sump, its not completely dry. Assuming it is remnant oil, run it to full operating temperature (has to be hot enough to burn off - short 5 min run won't help much), but don't rev it high just in case there is another issue. Keep an eye on the exhaust cloud, it should diminish as engine temps get high enough. If not, then you may have to flatbed it to a shop. But I am optimistic you will just burn off some old oil. Good luck.

crazycarlitos

was it parked on a hill during the hibernation ?

if yes, its prob normal and just burning off excess oil.

it is slightly odd that only the right exhaust is emitting smoke.

Spoddle

It could be the AOS, but it's more likely just oil which settled in the cylinders and is burning off.

myw

it's M97 engine not DFI.

to the OP was there any gas stabilzer added to the gas before being put into storage?

ashah

likely the air oil separator

extanker

if it does not stop...AOS

holden997

sounds like a ruptured membrane in the AOS.

Hella-Buggin'

So, it's smoking like that and you let it idle for 15 minutes?
If it was oil in the cylinders it would clear in a minute at most.
In the future, if something doesn't seem right, shut it down and call the mechanic.
It could be bad gas but these engines are expensive enough to warrant
a trip to the shop to find out.

gpjli2

Air Oil Separator as suggested above would get you the best odds. And yes you let it run on MUCH too long. Post results of tech findings for us backyard mechanics. Good luck

Dadio

AOS was most probable cause of the smoking. Take it to a competent mechanic before you do further harm to the engine by letting it idle for 20 minutes again hoping the problem will go away.

fskof

As everyone else has said... AOS (Air oil Seperator) common problem. Do a search many posts on it. There is a DIY in the DIY section if your handy.

TheLooch

Thanks All for the responses! I think to be safe I will have if flat bedded to the mechanic... Will keep you posted on the issue!

Sweeper

that doesn't look like oil smoke to me.