Troubleshooting the cam and crank sensors

Do a compression test on # 2 cylinder . Not a MAF sensor , would affect just 1 cylinder . Engine mechanical problem ,maybe . Take it to a qualified repair shop , rather then guessing .

Part 1 -How to Test the Ignition COP Coils (Nissan 1.8L)

troubleshootmyvehicle.com > Nissan > 1.8L

Feb 12, 2013 - What Tools Do I Need to Test the COP Coils. ... coils (most commonly known as the COP ignition coils), on your 1.8L Nissan Sentra is pretty easy. ... When one COP ignition coil fails... that cylinder goes 'dead' due to a lack of Spark and is said to be misfiring. .... 2000, 2001, 2002, 2003, 2004, 2005, 2006 ...

Part 2 -How to Troubleshoot a No Start (Nissan 1.8L)

troubleshootmyvehicle.com > Nissan > 1.8L

Jan 17, 2013 - Checking for Spark With a Spark Tester. ... Your 1.8L Nissan will either have a distributor-type ignition system or the more modern COP ... A BAD fuel pumpwill cause your 1.8L Nissan Sentra to Crank but Not Start... since the ... Still, the other method that I've used to test for a lack of fuel... is spraying starting ...

2002 Sentra 1.8, no spark, code 0505... - Nissan Sentra Forum ...

www.b15sentra.net > ... > Technical Discussion

Nov 4, 2008 - 15 posts - ‎3 authors
I have never had a problem with the car before (02 Sentra 1.8/auto), so I had no need to post ... Originally Posted by Black B15 ... Join Date: Jun 2005 ... Can you see if the coilpacks are getting spark & work back from there? how many spark plugs do i need ? - Nissan Sentra ...
7 posts
Mar 19, 2010
Spark Plug Replacement - 2002 GXE 1.8L - Nissan ...
15 posts
Oct 12, 2009
1.8s starting problems - Nissan Sentra Forum - B15 ...
15 posts
Jun 23, 2009
No start on 1.8L 02 GXE - Nissan Sentra Forum - B15 ...
15 posts
Apr 11, 2009
More results from www.b15sentra.net

Sounds like an intermittent crank or cam sensor.

Have you cleaned the Mass Air Flow sensor? Ask to see one at your parts store...then you can easily locate it.

call nissan give them the vin number thers a recall on the cam and crank sensors do that first
if the recall has been done and ther are no sensor codes find the missing cyl.move the coils around to see if the mis follows if not check batt volts green/white wire good ground at the black/yellow wire after that you need a lab scope to look at the wave pattern of each coil.ther should be 2-4 volt sawtooth pattern all the coils should look abought the same.

good day Sir, try to check the spark plugs and air filter, i hope this tips will help you.

The pump does have a filter on it but you should also have an inline fuel filter somewhere underneath your car, Check the pump when you turn the ignition key on the pump should run for a second or two then shut off if you can hear it , it is working. It is rare for a vechicle not to have an inline fuel filter but there are some models that don't have one. The filters on the pumps usually don't stop up that often,it's pretty rare.I would try to replace the inline filter call and ask your local part store if they have one for it and you will know for sure. And usually if the crank sensor is bad it won't crank at all.

SERVICE IT .....OIL PLUGS, AIR ,FUEL AND OIL FILTERS GET TROTTLE SENCOR AND THE MASS AIR FLOW SENCOR CHECKED

you need a haynes manual . because crank sensor can be behind crank pulley or on bottom side of engine that why you need a manual save you time.

Check for vaccume leaks and also you PCV valve. check the hose too. Visually inspect every vaccume hose you can find. Sounds like a leak .