Question about 1999 Saab 9-5

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How to tell if your turbo is functioning ok?

What would black or white smoke indicate

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White smoke inducates the Vatican has elected a new Pope!

No, really... White smoke means that somehow oil has seeped into the intake manifold, which could mean a couple of things. Here are some of them::

1. the throttle body valve has failed. this tube runs in an oil port down the manifold from the head, about 4" long.

2. worn valve stem seals or guides.

3. worn/cracked head gasket leaking water/antifreeze into the combustion chamber (causing steam)

4. turbo failure.. smokes at idle

5. cracked block. fissure inside cast block. change motor.

Black smoke indicates too much fuel being introduced through 1 or more ports. This could be anything from a stuck injector to a bad ECM sensor.. even a clogged air filter (which would ****** the air, causing improper mix)

Posted on Feb 05, 2010

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My 1992 nissan terrano blows to much black smoke .how to fix this .some say i have unbirt fuel?


if diesel and turbo , check turbo operation of for holes in the intercooler
if turbo or naturally aspirated check/ replace injector tips as black smoke indicators squirting and not atomizing
if petrol check for excessive fuel pressure, faulty injectors , leaking injector seal
regardless of petrol or diesel --black smoke indicates incorrect air / fuel ratio ( too much fuel) so injectors, intercooler, bad turbo or blocked air cleaner are all candidates for the fault

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Ssangyong musso. 2005 2.9 diesel. turbo. hard to


turbo seal is blown allowing oil into air intake charge-white/blue smoke=oil- black smoke=rich fuel mix-replace turbo-cheers Denny

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Exhaust smoke definitely not steam. Someone opined that it may be related to the turbo/exhaust system. What do you think?


A worn turbo or broken would create smoke. Blue or Gray smoke is either worn rings or a clogged PCV. White smoke is from foreign fluid entering the engine. Typically indicative of a head gasket leak. Black smoke is Leaking injectors or an ignition problem or an issue with the turbo.
If you are experiencing a loss in power then you most likely have a worn turbo bearing.

Sep 16, 2011 | Volvo S60 Cars & Trucks

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Black smoke in the exhaust and in high rpm white on passat 1.9tdi


this case , you have to check turbo charger , when high RPM white smoke means lubricate oil goes to engine so give white smoke . on low rpm trubo close coming black smoke means no enough air gose to engine so this need to replace turbo . some type of turbo can be clean the wase gate ( which open with diafam beside turbo) make sure it's moving when accilerate. check vacum is ok . then clean wase gate > only some type have wings inside )if no replace turbo

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F250 Lariat Diesel turbo no function sometimes and exhaust smoke white


you didnt specify if this is a 6L or 6.4L since its an 07 it could be either. If 6.0L, White smoke typically indicates a blown egr cooler and this usually damages the egr valve which may cause it to fail open allowing the coolant to enter the combustion chambers and be burnt and cause white smoke, If its a 6.4L I have seen the highside turbo bearings fail causing poor performance and seal failure resulting in oil getting into exhaust, high exhaust temps make it burn and it may appear as a whitish colored smoke depending on severity. Hopefully for you its a 6.0L becuase the 6.4L turbo r&r is a repair where we remove the entire cab from the truck. However your not much better off with 6.0L since egr cooler/oil cooler job can easily run you $1500-2000.

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1 Answer

Saab 9-3 diesel 120, My turbo charger is load and whe given a bit of throttle 2 overtake ect.. lots of black smoke piles out the back and sometimes e turbo will stop workin untill u tur the car of and back...


The turbo will not cause black smoke. White smoke, yes, if its passing oil into the engine, but not black.
First check that the air intake and filter is not blocked, check that the air hoses from the turbo and intercooler are not collapsing when given throttle.if thats ok, then get the injectors tested, if they are ok then you need to get the injection pump serviced. Black smoke is a result of overfuelling, either by the poor dispersal of fuel from the injectors or the pump, or blockage of air into the engine on the intake system.
Hope that helps

Feb 16, 2010 | Saab 9 3 Cars & Trucks

3 Answers

I had white smoke from the tail pipeand getting hot ... I had the heads done , gasket valve . and resurfising. when I got the saab back ,I drove it about 49 miles started driving slugish , bufs of black...


Sounds to me like they did a bad head job. No pun intended. lol, White smoke indicates moisture in exhaust but black smoke indicates a oil leak. I would take it back and have them check the job they did. If the car is over heating then the head gaskets are pretty much blown.

Dec 01, 2009 | 1999 Saab 9-5

1 Answer

1986 C Lebaron turbo 4 cyl. black smoke when


Black smoke is excessive burnt fuel. White is excessive unburnt fuel. Have your turbo checked and the air filter. Good Luck

Aug 22, 2009 | 1986 Chrysler LeBaron

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White smoke from exhaust


If you are getting clouds of white smoke out the exhaust it is a good indicator of antifreeze getting into one or more of the cylinders. I bought a "Great" car sight unseen from a friend once and when he pulled in the drive the whole car disappeared in a cloud of white smoke that only left when he shut the engine off. I found head gasket leaks in half the cylinders. It takes very little coolant to cause the white smoke. If you are absolutely sure of zero coolant loss perhaps the smoke is a little blue--an indication of burning a little oil from a sloppy turbo bearing. Try the nose test-- it may give you the answer. Burning oil has a distinctive smell.

Apr 18, 2009 | 2002 Volkswagen Jetta TDI

8 Answers

Saab 9-5 blowing white smoke from exhaust


One way to check for a blown head gasket, is to simply smell the coolant reservoir. Pop the cap, and see if it smells like raw gas. Every headgasket, I've diagnosed has had this smell, even if the oil is not contaminated. Another way is to hook up a coolant pressure tester, and run the vehicle for 15-20 mins or so. If the head gasket is blown, the pressure will exceed 15 psi. sometimes as high as 25 psi. If there is oil in the coolant overflow tank, the head is cracked, about 90% of the time.
I'm working on a 03 Saab 95 2.3l t. This vehicle smokes on initial start up, then the smoke disapates, and the vehicle is fine. Another mechanic diagnosed it as bad valve seals. I disconnected the pcv system, and the vehicle no longer smokes. If the valve seals have gone bad, the vehicle will smoke on acceleration. Also if the turbo seals are leaking it will smoke more heavily on acceleration.

Sep 09, 2008 | 1999 Saab 9-5

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