When I start my car in the morning sometimes, I see a puff of black/blue smoke. Its only when the car just starts to run and I stop the key. Its only 1 puff and then every thing is fine. No more smoke at all, even when I boot it. The car runs great.

 

What could it be.

Are my turbo seals going and I am getting some oil in the exhaust.

 

Help please anyone

 

 

Stuart (Slightly worried)

Are you in the Red Arrows display team?

Please get in touch and I will have your car checked over Free of charge.

 

CheerZ

 

Johnny

 

Tel:01942-671239

 

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Thanks Johnny. I shall phone you tomorrow or on Saturday if that is OK. At work at the moment.

 

 

Stuart

awwww, now isn't Johnny a damn nice chap !

*salutes*

Hey Stuart - what ever you do DON'T let Johnny drive your car You'll end up with more fines than Jeffrey Archer LOL

 

CheerZ,

 

Andy

Mine does the same, a friend in the states who loves hiz Z gave me this explanation (nothing to worry about:-

 

The puff of black smoke is just an indication of a rich burn. That's

OK, since when the car is first started, the oxygen sensors run in a loop

function that just sends a preset voltage to the ECU, and they do not make

any adjustments based on the air/fuel ratio. This is because any real-time

reading they would put out would be erroneous, since the catalytic

converters haven't lit off yet (they have to get up to temperature, around

900 deg F, before they work). Once the cats are up to temp and working the

O2 sensors will start feeding realtime data back to the ECU so that it can

make the necessary corrections in fuel delivery to maintain stoichiometric

air/fuel ratios. By design, the initial signal from the O2 sensor richens

the fuel mixture to protect the engine until it's warmed up, so that black

puff of smoke is just an indication of this initial rich burn. No problem.

By the way, the presence of blue smoke indicates burning oil, which could be

anything from rings, to leaking head gaskets, to turbo seal failure. White

smoke indicates water vapor (no biggie), or burning coolant (bad).

 

Stoichiometric? I can only just say that! LOL!

 

 

Tim

;-)

 

As it's blue smoke and not just black, it's worth having a look at. If the seals are going, it doesn't mean it will go tomorrow, it could last years. My seals always had a little bit of oil around them (on the outside!!!), for the past 5 years... so far so good.

Tim,

 

He lost me too!!!!

 

Vijay