Question about 1995 Nissan Maxima
I need help diagnosing the problem ... is it my fuel pressure regulator or possibily the injectors
Are you sure it's fuel? Not likely,if you were using excess fuel there
would be alot of black smoke coming from tailpipe. It could be water
as condensation, which is normal. However if you are getting alot of
black smoke, the first thing I would check is fuel pressure to detemine
if the regulator is defective.
Posted on Apr 19, 2013
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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
First thing I would do is make sure you battery cables have a flawless connection. I had a Honda with a similar problem. I changed the battery cable and it all went away. Like magic. Sometimes these can be a simple fix.
Posted on Feb 20, 2009
if its one. for a nissan the fuel injector can range from 150 to 300 dollors. what will kill you is the labor. you can drive your car but try to just go to work school what ever your priotities are. dont drive far until fixed. you have several injector which one can cause the other to malfunction. becareful and fix asap
Posted on Jun 04, 2009
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