02 Sentra. Sometimes wont start when cold outside

Bad gas with too much ethanol or water can cause a lean issue and P300 codes .

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
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have a furl pressure test done to check for pump/pressure regulator / filter problems . Also check the canister purge valve solenoid and check for correct venting of the tank. Check that the filler cap is on correctly and tight.

hmmm... did he by pass the FUEL FiLTER?

When did u replaced te FUEL FiLTER?

Thats the only thing that troubles the Sentras!

check also the FUEL PUMP, sometimes the pump stop working!

tell me afterwards when u replace the FUEL FiLTER!

before you go replacing any more parts do the abcs , check to see if you have spark, fuel pressure and injector signal, from there go to mechanical like compression vacuum, etc

I have the same car and had the check engine light come on for me as well.

Mine was because I put an after market cold air intake system and I took care of my filter by cleaning and replacing it when needed. If you have this or an a filter like a K&M air filter that has a bit of oil on it will coat on the O2 sensors and will eventually interfere with your O2 sensors giving your computer the wrong information like mine did and my revs went up as well. So I had to clean my 02 sensors and and reset my computer it fixes the problem or replacing the 02 sensors will of course work too but not needed. About 3-4 years then the check engine light came back on again and I went back to my normal stocked air intake and a regular filter and no more problems. I left my exhaust header on and I still have lots of power and fuel milage, so the cold air intake didn't icrease much power or fule milage... just a tad.

Hope this helps you a little.

The other J!

this is just a shot in the dark, but wiggle the wires on the top of the air filter canister...i had this same problem (though i never got in to check if the engine plugs) after I changed the air filter.

I had started to take that sensor off bove the air filter because i thought i had to, turns out i didn't need to do that. I put the air filter in, and my car wouldn't start...I unscrewed and screwed back in the tiny screws that hold that plug into the top of the airbox sensor thing (no idea what it's called)...and wiggled it around and it started fine again.

I will not change my air filter again!!

in cold tems you need to make sure that you use a block wormer it will help alot

Cold start valve or cold start injector. On new fuel injeccted cars they act like chokes did on carborated vehicles.

Its possible, that you crank angle sensor is failing. Also, that vehicle had a issue with the ECM/computer. Nissan put a set of foams inside of the ECM box to prevent the ECM from movement, however the glue that they used to attach the foams was causing the ECM to fail. The vapors from the glue would eat up vital circuits inside the computer causing failuer. I would go to your local dealer and provide them with your VIN nujber. With the VIN number, thay can check to ysee if the foam campaign has been doen and also the crank and cam angle sensor camaign. Nissan volunteraly replaced cam and crank angle sensors if the VIN number matches the campaign. Your ECM/computer is covered for 8years or 80000 miles. We are also starting to see timing chains getting stretched causing running issues, but you will have a "check engine light on" for cam angle sensor circuit. Anyhow, go to your local friendly NIssan dealer and have them run your VIN number to see if you have any open campaigns (crank and cam sensors, ECM foam etc.) Good luck and let me know what you find.