Question about Nissan Maxima
Easy to check with a fuel pressure gauge. If an injector is stuck open it will bleed off pressure and dump fuel into the piston cylinder. Piston rings will not hold the fuel, it seeps past them to the oil pan. This is the only reason for gas getting into the oil. Replace the injectors or have professionally clean. They have to be out of the engine to be cleaned right.
Posted on Mar 24, 2016
Chances are, you have at least one bad fuel injector.
More specifically, you have one or more bad injector seals.
The way your fuel injection system works is with constant pressure to all injectors while running. The injectors are basically a combination of an electrically operated valve and a spray nozzle. There is one injector per cylinder and each injector is supposed to provide fuel precisely when your car's computer sends an electrical impulse to open the valve. While the electrical portion of the valve and the spray nozzle may both be fine, there is a seal (usually an O-ring) that prevents fuel from entering the injector when it is not activated by a signal from the computer. If this seal goes bad it will allow some amount fuel to flow all the time, more as it gets worse.
Usually with white smoke, one would think head gasket or some other related cooling system problem, but I have seen this problem previously in late 90's Maximas, so in your case I would check for leaky injectors. I bet you have at least one.
I hope this helps.
Posted on Mar 24, 2016
If the oil smells like gas then there is either too much fuel entering the cylinder and not being burnt or the oil has not been changed with in the change interval. also if you take short trips a lot this can cause this as the engine won`t get hot enough to burn excess fuel and it is always in cold mode allowing more fuel supplied than is needed. the white smoke usually indicates coolant burning, but keep in mind when its cold out you will get what looks like white smoke but is steam from the exhaust. does the smoke smell like something sweet as this will indicate coolant.
Posted on Apr 07, 2015
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Posted on Jan 02, 2017
If you have steady thick white smoke and it smells like anti freeze it is most likely the head gasket. The head gasket can fail in different areas. If it has white smoke it failed between a coolant passage and the combustion chamber. If the oil is milky it failed between the coolant passage and an oil passage. Just because the oil isn't milky doesn't necessarily mean that the head gasket it's blown.
Posted on Oct 06, 2009
SOURCE: white smoke comes out tail pipe
Its perfectly normal.Hot exhaust gases mixing with cold air and by products of the combustion process create the watery substance that you see spit out .Dual fuel (LPG,Hydrogen etc) vehicles do this a lot more noticably.By products of the combustion process are various but water vapour is one of them.Alot of heat is generated by the exhaust so watching a car driving in very cold conditions you can see this effect more clearly
Posted on Oct 18, 2008
It often means that you are burning antifreeze. You asked if it needs antifreeze, have you noticed any leaking out of the reservoir tank while you are running it? Sometimes when the head gasket goes it will produce a passage for the antifreeze to pass from the capillaries into the combustion chamber. It is easy to check if you have an air compressor. Remove one of the rear sparkplugs and the radiator cap. Fill the radiator and then push some air into the sparkplug hole (get a good seal in case a valve is open). Repeat with all the cylinders and watch for air bubbles coming up into the radiator. If bubbles come up or fluid is pumped out, the head gasket is blown and must be replaced. It is more likely to happen at the back of the engine because it is farthest away from the fan and therefore gets less cooling. Also check your oil for discoloration. If it is a brownish color it could mean your oil and antifreeze are mixing and has the potential to damage your bearings
Posted on Jan 29, 2009
White smoke indicates water being burned. Also the ticking means your loosing oil. You most likely have a blown head gasket.
Posted on May 21, 2009
If there is no loss of Coolant, which is a sign of Head gasket failure to the combustion area, which generates white smoke, I would recommend after 4000 miles of your mileage alone, a complete Service of Engine Oil and filter, AIR filter and Fuel filter.
An inexpensive way to find a recurring combustion problem, At 60k miles, the Spark plugs should still be good, but pull them anyway, just to confirm.
Posted on May 10, 2010
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