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Posted on Jan 02, 2017
SOURCE: Fuel Pressue 1987 Nissan maxima
1st I hope you are taking the fuel pressure from the correct side of the system. The correct side will be the side coming from the fuel filter and before the fuel pressure regulator. At a normal idle, the pressure should be roughly 30-33 psi. When you crack the throttle rapidly, a sudden vacuum drop will cause the diaphragm in the fuel pressure regulator to shift causing the fuel pressure to jump sharply. Usually to 45 or 50 psi. You can check the maximum fuel pressure by dead heading the pump. This can be done by simply pinching off the return hose to the fuel tank. At an idle, the maximum fuel pressure the pump will put out will be displayed. You will also notice a slight jump in rpm's because it cause the fuel mixture to fatten up before the ECM can respond to changing the pulse width based off of the o2 sensor.
I hope my answer was satisfactory.
Posted on Apr 02, 2009
SOURCE: Were is the fuel pump located?
The fuel pump IS located in the fuel tank. It is easily accessed in this particuar model, under the rear seat. If you have an arm reat in the middle of the rear seat, you'll need to go in through the trunk. Remove the cover from the the far back, between the back of the rear seat and the trunk space. Remove approximately 4 to 6 screws in the center piece of cardboard that attaches the armrest and rearseat to the cross menber of seperating trunk from seat.
From the back seat, grab the top of the back rest of rear seat, PULL HARD forward on left and right sides . This should disconnect the top. Then, on left + right-sides, toward the lower cushon, there will be a bolt, remove them.
Then pull up the bottom cushion.
In the middle of the floor you have left, where the bottom cushion once was, you will find the top of the fuel pump access. From the top there is a cable that goes toward the driverside, follow it to the connector which should be cover by a small piece of foam. Remember to diconnect the pump before attempting to service or replace it.
Posted on May 20, 2009
The water pump is located behind the timing chain cover. There are two black plates on the front cover. The one near the front of the car has the water pump behind it. The other one has the timing chain tensioner behind it. First you must drain the coolant. Then support engine and remove engine mount. Then remove drive belts. Then remove the two black plates. Push the tensioner in and lock it with a paper clip. Then remove the two bolts holding the tensioner and remove tensioner. Then remove the water pump bolts. Rotate engine crankshaft the take tension off of water pump (about 20 degrees). Then install two bolts into water pump threaded flange (M8). Tighten M8 evenly as water pump will come without damaging it. Check for corrosion. Then replace with new one. Make sure you use new "O" rings. Lubricate with engine oil. Put the original three bolts back in the water pump. Then install timing chain tensioner and black covers. Replace belts and engine mounts. Add coolant and pressure test system.
Posted on Sep 07, 2009
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