Where is the cam position sensor on a 2000 Maxima GXE

The camshaft sensor is positioned on the end of the cylinder head.

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Here is the location....

http://www.courtesyparts.com/maxima-parts-a33b-2000-2003/genuine-nissan-parts/engine-electrical/221-distributor/-c-1956_1957_1988_1990.html

Check fuel pressure regulator, use a good fuel pressure gauge to check fuel pressure, when was the last time u changed your fuel filter

There are two speed sensors one is called a revolution sensor that is located on the case of the transmission. You can take the driver side wheel off and see the sensor on the top of the case of the transmission. A 10mm bolt is holding it in. Easy fix

Did you clean ECU memory from trouble codes? No? DO it!

Distributer Signal Output is code p1320........Intake Valve Timing Control Position Sensor Bank1 is code p1140...

ABS was optional as an add-on for the GXE Model so I can't say whether you have them or not based on the model. When you turn your key to the on position before starting the car, if you see an ABS light, then your car will have abs. If there is no light, then most likely you do not have abs.

The laser assembly has lost its ability to focus on disk surface. Replacement of unit is in order/repair not cost effective.

Here is

Yes, cam sensor can cause a hard starting condition, but not that common on a 2000 maxima. I haven't replaced single one on a 2000 Max and I have one also (maxima that is) . Never had any problem with cam or crank sensors. I think that your problem is somewhere else, like IAC valve circuit. Just a tip. Its kinda hard to diagnose something over the computer, without Consult2 (Nissan scanner) beeing hooked up to the car and seeing what the car is doing while cranking for my self.