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2002 altima black smoke Forums > > 2002 altima black smoke 2002 altima black smoke
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Altima Nissan Altima Sedan Discussion Forum

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  #1  
Old 08-12-2011, 06:58 AM
johndylan1000 johndylan1000 is offline
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Default 2002 altima black smoke

hello all
I have a problem with my nissan altima. I am getting black smoke and poor to no idle. i have scanned for dtc and only get system rich. my canculated load is at 100% and i dont know why. can anyone help?
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Old 08-12-2011, 09:40 AM
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NissanTech NissanTech is offline
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Rich air/fuel ratio can be caused by many things. Leaking fuel injector, bad spark plugs or faulty air flow meter are probably the most common causes. If the engine is running rough, try disconnecting one ignition coil at time, if the engine idle gets worst when is disconnected then that's the cylinder that is misfiring.
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Last edited by NissanTech; 08-12-2011 at 09:44 AM.
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Old 08-12-2011, 12:53 PM
johndylan1000 johndylan1000 is offline
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i have checked everything. cam position sensor crank position sensor timing timing chain no leaky injectors no dtc when i scan it the only thing that is out of range is the Calculated load value its at 100%. i thought the tps was out of wack but preformed the idel air learn stradgity and get the same thing.

Last edited by johndylan1000; 08-12-2011 at 12:54 PM. Reason: forgot something
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Old 08-12-2011, 12:59 PM
johndylan1000 johndylan1000 is offline
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could the maf sensor out of wack telling the computer that it needs more gas.why is the calculated load value at 100%. i scan other cars and get 7 to 20% at idel.is there a baro sensor that im not seeing. i have the manual from nissan and also have mitchell on demand 5. i havent found anything.
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  #5  
Old 08-12-2011, 10:39 PM
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bennyb53 bennyb53 is offline
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Black smoke coming out your tail pipe and the misfire are your clues. Is your SES light on?

Remove and inspect each spark plugs to see which ones is/are fouled. Possible HO2 sensor failed.

Do a compression test for possible bad head gasket.
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Old 11-05-2016, 05:55 AM
Paddy237 Paddy237 is offline
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Thanks Benny , My mechanic has done everything he can possibly do to rundown the problem, new spark plugs, MAF sensor , compression test, electrical system diagnostic, cam sensor, checked each coil pack (which were only 2 years old) He told me he can't track down the problem, the car isn't coding, so he has physically exhausted all the possibilities. I was wondering if the ECM could be reset before I remove it for the R & R I mentioned in my original message. My Mechanic is my cousin and has his own garage with many, many years of experience. Like I said; I trust him implicitly, if he says he has done everything he can, I have no reason to disbelieve him.
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Old 11-06-2016, 04:32 PM
Soapmyster Soapmyster is offline
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I have to mention about the coils, I have had to replace a few of them on my 03 because of random misfiring.
You have no codes? What about the check engine light?
Air filter condition?
Black smoke is caused typically from too much fuel with not enough air.
something is very wrong with the engine load reading. It should be close to 0 unless you are giving heavy acceleration, towing, or have a heavy load. almost never see 100% under any other condition.
Welcome to the forum
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  #8  
Old 11-06-2016, 10:45 PM
Paddy237 Paddy237 is offline
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My Main reason for checking with the forum was to get an opinion about resetting the "computer" would it need to be reprogrammed or is it reset to factory default just needing to "relearn" things like idling and so on....Looks Like nobody is able to offer an opinion on this issue.

Last edited by Paddy237; 11-08-2016 at 07:07 PM.
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