You arent running valvoline or pensoil are you if you are dump them put castrol 10 w -30w in motor if you still have smoke check your pcv valve truth of the posibility it might just be worn out im talking about light blue oil with regular oil you dont want a high milliage nissan as they basically cannot be rebuilt economically to much work engine swaps ? difficult at best
SOURCE: running rich and blowing black smoke
Could be a number of different things.Fuel pressure relief valve not working,injector pulse too long,Is the air box lid securely fastened and air cleaner clean.Are there no leaks between the air box and throttle body(intake tube).Have you checked oxy sensor.air flow meter may be also possible.Try squeezing the flexible fuel hose enough to allow the engine to run and see if the engine reacts better if it does you have excessive fuel pressure.
SOURCE: Black smoke coming from my 97 Toyota corolla
The black smoke is a sign of excessive gasoline not burning completely, there is a wide range of probabilities that may be causing this to happen my best advise would be to have it diagnosed with a scanner, otherwise you could spend a lot of money replacing "probable" malfunctioning parts till you find the one that was broken (eg: EGR valve, MAF, coils, injectors, etc.) good luck
SOURCE: what causes white smoke exhaust system 1998 toyota camry v6
The likely cause is coolant leaking into the cylinders due to a failed head gasket. You should be losing some coolant and need to top it up so check the level. You will also find that coolant is finding its way into the lubrication system and "contaminating" the oil.
Remove the dip stick to check the oil and if you can see a whitish substance in the oil you have coolant in the lubrication system which is is leaking through the failed head gasket.
You may also see traces of oil in the vehicles cooling system so look there also.
The only fix for this problem, once properly diagnosed, is to have the head removed from the engine and a new head gasket fitted. The head would also need to be checked carefully in case of cracking and in any event would most likely need to be machined by a head specialist before being refitted.
The `cause of the failure is unknown but if the vehicle has ever been operated with an overheated engine (due to problems with the cooling system) this is enough to blow the head gasket and to potentially damage the head on the engine.
Not good news I'm afraid so please get it checked out and properly diagnosed with a reputable auto repair business.
Sean
Voluntary contributor.
SOURCE: 1986 toyota truck 22r fuel injected. runs to rich
check for a vacumn leak, my buddy has a 96 dually that did that,found out it was his temp sensor to the computor,was showing a negative # when i tested it,he replaced it and it fixed everything! He couldn't believe it LOL
SOURCE: d4d smoking
try wynns/redexe to clean injectors/lines,they do seem to smoke a lot though....
Testimonial: "Thanks, yes, I thought common rail should be low emmisions, less particulate!?, but I'm not sure."
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