Nissan Repair: 99 maxima white smog coming out engine stall, fuel pressure regulator, haynes manual

Question
QUESTION: I've 99 maxima se,when u start engine seems ok but still misfire occurs and when it's warmed up white smoge coming out of pipe and hesitate on  engine and mostly stops specially when i press the gas pedal on idle.I can not go more than a mile and consume gas abnormally.Also gas smell coming out of exhaus pipe.I've removed all the spark plugs.all of them was black,wet,smell strong gas.the one on middle of back of engine was compleately covered by oil.Replaced all spark plugs but still same problem nothing has changed.

ANSWER: Hank,

Sounds like you have stuck injectors or a plugged fuel filter or a broken fuel pressure regulator.  I would check the codes as it seems you are running way too rich.  Check the fuel pressure to get your fuel pressure reading adn get a Haynes Manual to reference acceptable pressure.  There is a remote chance that the injectors are defective.  If the pressure is fine and the injectors are not leaking it could be that the crank and cam position sensors are messing up.  You really need to see if there are any codes set.  Email me back with what you find and we'll go from there.

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QUESTION: Von I found out that fuel injectors stuck open.I tried to remove intake monifold.So far I've remove two bolts from behind of intake and four bolts in front also disconnected air filter from throttle body,disconnected couple sensor connector on top of intake manifold and I don't know what else to remove.Four corner of intake is moving but not coming out.Is there any link that i can get some more info.Thanks..

Answer
Hank,

You will want to remove the upper intake first and then you can get to the injectors.  You do not have to remove the entire intake.  Also, a Haynes Manual would be great to purchase for the pictures of how it comes a apart.  There are six bolts for the upper intake and a brace bracket by the throttle body.