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I have a 14 altima s w/ 133k miles on her. Haven't had a bit of trouble with her. I get in her to go to work this morning and she wont start. She turns over but will not finish. Can anyone tell me what they think it might be?
 

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Altima FTW
ASE Certified Master Technician & Advanced Level Specialist
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Likely missing spark or fuel. Disconnect the air box and spray some starting fluid in there while someone cranks the engine. Be careful not to spray the MAF sensor while doing this. If it fires then dies its a fuel supply issue, which is most likely a bad fuel pump. If no change possible crankshaft position sensor problem. If this sensor doesn't read the engine will never fire the coils. Good way to to check is with a scan tool. Pull up the engine rpm PID while cranking and see if you have cranking rpm. Would also most likely have a code for CKP sensor if faulty also, so a code scan would be useful.
 

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Wow , talk about a quantum leap to fuel pump failure and mass air flow sensor problems how about starting out simple

like making sure the battery is good . She said it stopped mid crank cycle.

Before doing any of the other things mentioned in this post make sure the battery is good . Can the car be jumped to get it started ?
 

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Altima FTW
ASE Certified Master Technician & Advanced Level Specialist
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Wow , talk about a quantum leap to fuel pump failure and mass air flow sensor problems how about starting out simple

like making sure the battery is good . She said it stopped mid crank cycle.

Before doing any of the other things mentioned in this post make sure the battery is good . Can the car be jumped to get it started ?
I said nothing about a faulty MAF. Starting fluid is a quick and easy test for someone who doesn't know the ins and outs. "She turns over but will not finish" to me sounds like a crank, no start scenario.
 

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X2, I got the same thing out of it. Cranks but no start.

Couldn't hurt to ask how old the battery is though, under certain conditions one just about to die can turn the engine over but then little enough power left doing so the ignition then does not get full volts to not start.

I'd be careful with the starting fluid and rookies too, modern EFI engines use more space in the intakes and you really have to put a pretty good size shot of ether in there and a problem if somebody has wet the plugs to not start, a plug can then misfire to backfire up the intake and the ether then explodes to blow the intake up in pieces. Why I always push a 2 second rule, no more than a 2 second shot of ether and counting fast. Then do NOT add more until the original shot has burned out or dissipated meaning let engine sit a while. MAF likely mentioned as a detonation source from the hot wire in it. Why you don't spray it.

I use ether when needed, but carefully, I know somebody who blew an engine up to break 6 out of 8 connecting rods misusing it.
 
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