My 2002 Nissan sentra wont start. new spark plugs, starter cranks strong, fuel is flowing, but wont turn ?over

Won't start how ? When you turn the key to the start position does anything happen ? Does the starter engage an spin the engine ? If it does , what's missing ? Spark or fuel ? Pull a spark plug wire an stick a screw driver in the end of the plug wire an hold near metal on the engine (ground) Have someone crank the engine . Is there Spark ? Hook up a fuel pressure gauge ,does it have fuel pressure ? Videos on youtube showing how to do testing .
No Start Diagnostic Basics EricTheCarGuy

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 ...
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Mar 19, 2010
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1.8s starting problems - Nissan Sentra Forum - B15 ...
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have you checked the coils on each spark plug to do this take out one plug attach the plug wire back on to the plug and ground the plug to the motor and have some one crank over the motor but do not hold on to the plug or you could get a strong shock
mgsoils

Does the starter crank the engine over? If so, check for spark on a spark plug wire when cranking. If you have a strong blue spark, ignition is probably good. Check fuel pressure. Do you hear the fuel pump turn on for 2 seconds when turning key to on?

I assume you checked the fuel pressure and it is normal.
Are the spark plugs getting spark when it fails to start ?
Are you getting injector pulse from the computer ?
Any trouble codes stored in the computer ?

good day Sir, try to check the spark plugs and the coil hope this will help you.

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

pull one of the coils out of the eng and attach the sparkplug and check for spark. if you don';t have any spark i suggest replacing the crank sensor. if you hae spark check for fuel pump activation. last and most unlikely ecm failure

CHECK FOR SPARK AT SPARK PLUGS, CHECK CRANKSHAFT SENSOR, CHECK FUEL PERSURE, ALSO CHECK FOR INJECTOR PLUSATION.

If you smell fuel, there is a chance that the engine is 'flooded' and fuel has wet the plugs. You can dry it out to some extent by pushing the accelerator slowly to the floor and holding it there while you crank the engine. If it still won't start (or at least fire a couple of times) then you may not have any spark to drown. If it does sputter a little, continue holding the pedal down and continue cranking to see if the other cylinders will follow. It's time to pull a plug wire, place it on the block or other grounded surface and have someone crank it to see if there is any spark at all. If not, there are too many things that could prevent it so you may have to have the computer scanned to see what might have failed.