I have a nissan xterra 2000 that emmit black smoke and also comsume fuel. what might be the cause?

SOURCE: 2000 nissan xterra wont start but will crankover

my truck didn't do the crazy idling so much but it was running a little rough before it finnally died. it just wouldn't start back up. i changed the fuel filter i could hear the fuel pump working i finnally pulled a spark plug out and realized it wasn't getting spark. after hooking a computer module up under the dash it told me that the camshaft position sensor was out. the sensor is integrated into the distributor therefore you have to change the distributor to replace the sensor. hope this helps some, i'm actually trying to fix mine tomarrow

SOURCE: knock sensor

You have to take the entire intake manifold off upper and lower. you will find it on the main block after you take the lower manifold off.

SOURCE: diagram of changing a 2000 model nissan xterra

I am assuming you have the 3.3 litter v-6?I just did my own so I can offer you a few words of personal advice. Make sure, before you remove the crank shaft pulley, that the engine is at TDC. There is a pointer on the lower timing cover that should line up with the mark that is furthest to the left on the crank pulley (looking at it from the front of the truck). If you are replacing the timing belt for maintenance, not failure, make several marks on the cam pullies to the rear of the timing cover with a paint pen before removing the old belt and make sure that everything stays aligned to those marks upon reassembly. If this method is not an option, use the timing dimples on the back of the upper timing cover only as reference points for the cam pulleis (this is where I ran in to trouble). What is most important is that there are exactly 40 teeth on the belt between the marks on the cam pullies and 43 teeth between the right cam pully mark (right cam as you look at the engine from the front of the truck) and the mark on the crank pully. I used a Goodyear Belt that actually had marks that indicated the 40 and 43 tooth increments. Make sure you have the belt on the right directon, arrows to the front of the truck. Again it is very important that the crank pully remain at TDC (top dead center) during the entire process. Good luck, hope you get it the first time and not the second like me!!

Barry N Melissa Spring

• 230 Answers
• Posted on Mar 31, 2010

SOURCE: HOW TO REPLACE A FUEL PUMP FOR A NISSAN XTERRA

Removal & Installation

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Relieve the fuel system pressure.
3. Drain the fuel tank.
4. Remove or disconnect the following:
   
   Negative battery cable Fuel pump module harness connectors Filler hose shield Fuel pressure and return lines Filler hose Vent hose Evaporative Emissions (EVAP) hose Fuel tank skid plate Fuel tank Fuel level sender Fuel pump
   

1. Install or connect the following:
   
   Fuel pump Fuel level sender. Tighten the screws to 17-23 inch lbs. (2.0-2.5 Nm). Fuel tank. Tighten the bolts to 27-36 ft. lbs. (37-49 Nm). Fuel tank skid plate. Tighten the bolts to 27-36 ft. lbs. (37-49 Nm). EVAP hose Vent hose Filler hose Fuel pressure and return lines Filler hose shield Fuel pump module harness connectors Negative battery cable
   
2. Fill the fuel tank.
3. Start the engine and check for leaks.
   
   

SOURCE: black smoke on my nissan terrano when you put

black smoke usually indicates to much fuel being delivered. If this is the case you need to correct it soon or you will damage the catalytic convertor. What year is the vehicle and how many miles on it? Is there a check engine light on? this info would help