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It is, in order of likelihood:

The fuel pump
The fuel filter
The fuel pressure regulator

I'd bet $1,000 on it. But try actually diagnosing it instead of throwing parts around? Might as well just go to a mechanic if that's what you're going to do.

I have no idea why you'd suspect an alternator or spark plugs. Or why someone would think vacuum….lol.
 

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Hi I am new to the Forum, but we have had a 2014 Nissan Versa Note for about 2 years. We already had the CVT transmission replaced at about 74k miles. Now at about 87,000 miles the transmission seems to work fine except when I am going up a slight incline at highway speeds. What happens is we are travelling about about 75 to 80 MPH as most of the traffic on this stretch of highway does. The RPM's will suddenly drop about 500-1000 RPM's then come back up to the original reading. There is a slight surge when it happens too. Then it feels like the vehicle wants to start pulling like it is supposed to. I am not sure if it is the transmission or if I should be looking into something else. I have the problem if the A/C is on or off. So I know it's not the A/C causing the issue. If anyone can help me out or has experienced this issue with the CVT please feel free to let me know. I am perplexed and don't want to have to replace the transmission again if that is what it is. Thanks!
I took a video of my gauges as I drove the vehicle this afternoon. I figured it would at least show a little bit about what was going on with the engine while driving it on a slight and I mean slight incline. Let me know your thoughts. Thanks!

https://youtu.be/XGyejSeMoqY
 

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I took a video of my gauges as I drove the vehicle this afternoon. I figured it would at least show a little bit about what was going on with the engine while driving it on a slight and I mean slight incline. Let me know your thoughts. Thanks!



https://youtu.be/XGyejSeMoqY


Ok here is a better video to show what is going on. Watch the RPMs. They drop and fluctuate. Please feel free to let me know your thoughts.

https://youtu.be/tuUUmHZ4JAw


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Nothing to add other than it's a tough diag. Maybe some data can be retrieved from diagnostic port for the transmission.
 

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So quick update

I recently had the oil change done on my vehicle as I do every 5k miles. I am not sure what changed, but the vehicle is working as it should be. I discovered that the issue that I was experiencing felt like the vehicle going in and out of limp mode.

I have a feeling the last time we had the oil change done the shop put the incorrect oil (heavier weight) and that was causing the issue. This started shortly after the last oil change. I never put two and two together. I am now getting better gas mileage and when going up hills the car holds the higher RPM's and does not falter at all. This has left me scratching my head. I had the transmission computer checked and there were no codes and was within normal operating parameters. Also there was no check engine light either. So like I said all is well now. I will let you know if the issue comes back. Thanks!
 

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Heavier oil absolutely will NOT make an engine miss, I run it in every single car I have including my '11 Versa. Using 15W-40 right now. As I said, likely not an engine issue anyway.

Cars do not go in and out of limp mode as well, when they go in it they stay there until the problem is fixed. The recording there shows nothing that could be construed as limp mode.
 

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Thank you for your reply. I will tell you that the computer did show that the vehicle had gone into limp mode. However the dealer could not find any issues. All I’m saying is since I had the oil change done the car has been absolutely fine.

Running a heavier oil in these engines (or any newer engines) is not a good idea either. I always make sure I use the required fluids. The previous time I had the oil done I was not close to home and so I couldn’t get it into the dealer. So I took it to another shop which I will not be going back to again.

As for the misfire I don’t believe I said the vehicle was misfiring. I simply said it was bogging down and losing power when going up hills. I drive this vehicle 110 miles a day round trip and I go up quite a few hills both ways. The vehicle at this very moment has no check engine light or malfunction codes. It’s running smoother than it has since the issue first showed up. I will keep an eye on it and see if it comes back. But for the moment I’m kind of curious as to why we had an issue to begin with.

Thanks!




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Did you find out what It was?? Just fixed mine, sounds along the same lines/Issues. I’d say it’s a bad FpR/Pump. GoodLuck Brother!



https://www.nissanversaforums.com/e...nissan-versa-hard-start-no-start-stumble.html


I have not. The car was running excellent until this afternoon. I was on the highway and started coming up a hill and the vehicle started doing it again. I’m going to make an appointment again to get it into the dealer. It’s perfect until we start going up any kind of incline. It is starting to feel sluggish again too. The transmission is not slipping. As the RPM’s never feel like they’re just revving and the vehicle is not going anywhere. Is that what you were experiencing? Is the fuel pump easy to get to?


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Thank for the reply!
It's an automatic, non-cvt

I've replace the spark plugs an I'm slowly putting things back together.
The gap on the removed spark plugs were around .050 to .055 . My repair Manual (and new ones) say .043 . So they did need to be replaced.

Right now i'm looking at throttle body. it's just sitting there all dirty begging to be cleaned. But i keep reading about people getting into trouble trying to clean it. I could not find any versa specific tips on throttle body cleaning on these forums. I know not to unplug it, but can moving the butterfly valve to clean around it cause problems also?
It's just sitting there staring me in the face as I do my work
(Like the 1 ring calling to Frodo)E

Please keep the tips and suggestions coming!
when you clean the throttle body DISCONNECT THE BATTERY!!! Take TB OFF THE INTAKE. be careful not to scratch the throttle plate because there is a Teflon
coating.. i use a soft tooth brush if the throttle body cleaner doesn't cut it.. look at all vacuum ports for dirt and debris clean as necessary, also always replace the gasket don't use any RTV SEALENT!!! LOOK UP THE BOLT TIGHTING SEQUENCE AND TORQUE SPEC. also there might be a relearn procedure if you have to replace with a new one you have to a bidirectional scan tool hope this helps
 

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Well, the jerking and stumbling showed up again.

Quick question, are there transmission codes for Nissan that will not necessary turn on a check engine light?
Would a slowly-failing fuel pump cause a check engine light?
Best way to check a fuel pump? wait for it to act up and pressure test?

It occurs when the car is under load, accelerating around 2000 rpms, usually up a slight hill. I'm guessing i'm in 1,2 or 3rd when it happens. It seems to happen during snowstorms and when the car has been fully warmed up. I believe can avoid the stumble(s) if I get a little aggressive with my acceleration.

I cannot recreate at will, some times it acts up, sometimes not. It drove fine for the last 10 days.
I tried spraying some water under the hood to see it the snow/moisture what causing something to short out, but still no luck.

I'm thinking about bringing it to the dealer, but I don't want to get the old "sorry we couldn't recreate it, now give us our money" statement.

feeling down :(
Did you find the problem? You're describing exactly what's happening with our 2007 versa (1.8L, 6 speed manual transmission, 200 000km). Under these conditions, we're getting the same stumbles, just not necessarily when on a hill. Thanks!
 

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Did you find the problem? You're describing exactly what's happening with our 2007 versa (1.8L, 6 speed manual transmission, 200 000km). Under these conditions, we're getting the same stumbles, just not necessarily when on a hill. Thanks!
You issue could be totally different. You always need data to diagnose unless you want to just start guessing, but that adds up quickly, especially when the fix isn't a part replacement.

Ignore post #21. Those are all the same part...the fuel pump has the regulator and filter in it, and can be diagnosed with data easily.
 
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