[sistermoon2500]

I have no idea how said valve helps fuel economy so I won't argue with you.

But I have an update: I replaced both camshaft sensors last night; the damn thing started getting poor fuel economy again... And MAN its got some pep now!! Currently I'm at 157k miles on the MO and changing said sensors REALLY helped! Drove around for like two hours just revving it (within legal parameters of course) yesterday morning. It was super fun!! Car passed me doing 55 mph before I turned on to the highway. Put it in S mode and caught up with EASE and before I knew it! Was not expecting that!!

S mode?

 

[Madness!]

S mode?

Yeah the gear shifter has a s mode on it just prior to shifting into low for towing. It's a lower gear for more performance. It's also kind of fun.

 

[sistermoon2500]

Yeah the gear shifter has a s mode on it just prior to shifting into low for towing. It's a lower gear for more performance. It's also kind of fun.

Can u please take a pic? Never seen s mode. mine has D, N, R, P and then manual mode

 

[PaulDay]

Can u please take a pic? Never seen s mode. mine has D, N, R, P and then manual mode

Manual mode is the replacement for "S" on the older Gen Murano. "S" mode brings the engine RPM up at the same speed to give better acceleration when passing or pulling a trailer up a long incline.

Have a good day.

 

[PaulDay]

Can u please take a pic? Never seen s mode. mine has D, N, R, P and then manual mode

Another way to describe the function of "S" is to compare it to a manual tranny.

With a manual, while cruising in 4th gear with the engine RPM @ 2200 and you want to pass, but it's a long truck to get around and you want to do it as quickly as possible you do this.

Down shift to 3rd gear and the engine RPM will jump to 3400 RPM, much closer to the power range of an engine, giving you much quicker acceleration and speed than if you just pressed on the gas pedal, waiting for the engine to come up to its power range.

With auto/CVT tranny's, you can press gas pedal to the floor, and it will force the tranny to downshift in a similar manner. The tranny downshifts in response to engine speed and mechanical pressure from the gas pedal.

Unfortunately, under wet conditions this can cause wheel spin and a loose of control due to the engine already revving during the shifting process. Due to traction control features this is mostly a non-issue, but there's always the exceptions.

To alleviate this, manufactures add the ability to downshift manually ("S" Mode) with auto trannys, reducing the possibility of wheel spin, treating it like a manual downshift. Downshifting before the engine revs.

On the 3rd Gen Murano, move the shifter over to manual and then downshift to 5th gear before stepping on the gas pedal when you want to pass, but don't want to slam the gas pedal down. You'll be surprised at how quickly the Murano jumps forward, when asked the right way. Actually, it's kind of fun to pass that way if necessary.

Hopefully this wasn't too long winded and is a little helpful in understanding your Murano.

Have a good day.

 

[Madness!]

Another way to describe the function of "S" is to compare it to a manual tranny.

With a manual, while cruising in 4th gear with the engine RPM @ 2200 and you want to pass, but it's a long truck to get around and you want to do it as quickly as possible you do this.

Down shift to 3rd gear and the engine RPM will jump to 3400 RPM, much closer to the power range of an engine, giving you much quicker acceleration and speed than if you just pressed on the gas pedal, waiting for the engine to come up to its power range.

With auto/CVT tranny's, you can press gas pedal to the floor, and it will force the tranny to downshift in a similar manner. The tranny downshifts in response to engine speed and mechanical pressure from the gas pedal.

Unfortunately, under wet conditions this can cause wheel spin and a loose of control due to the engine already revving during the shifting process. Due to traction control features this is mostly a non-issue, but there's always the exceptions.

To alleviate this, manufactures add the ability to downshift manually ("S" Mode) with auto trannys, reducing the possibility of wheel spin, treating it like a manual downshift. Downshifting before the engine revs.

On the 3rd Gen Murano, move the shifter over to manual and then downshift to 5th gear before stepping on the gas pedal when you want to pass, but don't want to slam the gas pedal down. You'll be surprised at how quickly the Murano jumps forward, when asked the right way. Actually, it's kind of fun to pass that way if necessary.

Hopefully this wasn't too long winded and is a little helpful in understanding your Murano.

Have a good day.

Why should you downshift before you rev the engine, I'm curious?

As for your question about a picture here you go!

 

[PaulDay]

Why should you downshift before you rev the engine, I'm curious?

As explained, for traction control. And also, for a smoother acceleration experience.

In older rear wheel drive vehicles, kicking down the tranny with the gas pedal on a wet road could very easily cause the rear end to kick out, resulting in a spinout. The engine is reaching its power range while the tranny is downshifting, causing excessive power to be suddenly applied to the rear wheels, making them spin, loosing traction.

If you've ever driven a Chevy El Camino in the rain, you learn really quick not to be pressing on the gas hard while accelerating around a curve. If the tranny shifted in the middle of the curve, you were going for an unplanned ride, hopefully not into a guardrail.

Have a good day.

 

[sistermoon2500]

Another way to describe the function of "S" is to compare it to a manual tranny.

With a manual, while cruising in 4th gear with the engine RPM @ 2200 and you want to pass, but it's a long truck to get around and you want to do it as quickly as possible you do this.

Down shift to 3rd gear and the engine RPM will jump to 3400 RPM, much closer to the power range of an engine, giving you much quicker acceleration and speed than if you just pressed on the gas pedal, waiting for the engine to come up to its power range.

With auto/CVT tranny's, you can press gas pedal to the floor, and it will force the tranny to downshift in a similar manner. The tranny downshifts in response to engine speed and mechanical pressure from the gas pedal.

Unfortunately, under wet conditions this can cause wheel spin and a loose of control due to the engine already revving during the shifting process. Due to traction control features this is mostly a non-issue, but there's always the exceptions.

To alleviate this, manufactures add the ability to downshift manually ("S" Mode) with auto trannys, reducing the possibility of wheel spin, treating it like a manual downshift. Downshifting before the engine revs.

On the 3rd Gen Murano, move the shifter over to manual and then downshift to 5th gear before stepping on the gas pedal when you want to pass, but don't want to slam the gas pedal down. You'll be surprised at how quickly the Murano jumps forward, when asked the right way. Actually, it's kind of fun to pass that way if necessary.

Hopefully this wasn't too long winded and is a little helpful in understanding your Murano.

Have a good day.

thanks for the info. for manual mode all i notice is when i start driving with manual on gear 1 car kinda jumps quickly. comparred to D mode... Looks like on D mode it starts with gear 2 or 3? since i cant see what gear it is in D mode.
Also i once tried to downshift form 3 to 2. not sure what speed was it. but engine RPM went very high. and i ended up with a Transmission Low pressure oil code. i changed the CVT oil after that.
Are there any rule to follow in manual mode? Do i have release Gas pedal mode while changing gears?
Anothe question, i had this issue from day one i got the car.. when i floor the gas pedal. after few seconds i smell burnt oil in cabin, could be engine oil or cvt, im not sure. happens on high RPMs.. a mechanic saw it and said its the cover of headgaskets. he shown me oils on manifold, said these burn and you smell oil. He tried to tighten the valve or cover under manifold it was good for a week. then again looks like its leaking on high RPM.
I ordered a blue Driver OBD 2 tool. i heard it shows a lot more info and is comparable with thousands of dollar Diag tools. to see what kinda info i get.
in General Nissan needs maintainace to keep it in perfection and its costly. I would go for a Lexus next time. Lexus RX 350 specifically. same V6 and natural breathing, No turbo or anything weird. Just liek murano but without the CVT just with more horse power engine ( 270)... oh and made in Japan for sure. just like my Mo. the ones assembled in other countries dont have same quality as the imported ones

 

[sistermoon2500]

Why should you downshift before you rev the engine, I'm curious?

As for your question about a picture here you go!

thanks for the pic. never seen L mode either. but paul explained it very well. If im not mistaken. it does somethign similar to Over drive... My dad's car had one... instead downshifting one gear, it downshifted half a gear for passing.
Random question. do you see the space next to Cig lighter? In manual it says its Cellphone holder, but to me it looks like an ashtray... Which one is it?

 

[PaulDay]

Are there any rule to follow in manual mode? Do i have release Gas pedal mode while changing gears?

When I do downshift, I just move the shifter and as soon as I see the RPM jump up, then I slowly press more on the gas pedal to come up to passing speed.

You ever watch those car show videos where the muscle cars leaving show off their power, burning rubber down the street being cheered on by a bunch of Idiots? And a few of them end up spinning out of control? Yea, well those are the guys who haven't learned how to properly shift and reapply power, wither it's an automatic or standard. They've watched too much street racing videos, where it's a straight line and the car is set up for that type of racing, full on power thru the gears. You'll notice that most of them that wipe out are factory race cars, Corvette drivers being the worse. They got the power, just never trained on how to properly apply it.

Anothe question, i had this issue from day one i got the car.. when i floor the gas pedal. after few seconds i smell burnt oil in cabin, could be engine oil or cvt, im not sure. happens on high RPMs.. a mechanic saw it and said its the cover of headgaskets.

Unfortunately, you need to have the valve covers removed and new gaskets installed. If they're still leaking after being snugged down, it's a lost cause doing anything else.

Be prepared to replace the valve covers. They're made of plastic and get brittle after years under a hot hood, made even more worse if you live in a hot climate to start with.

Luckly, you can find them really cheap on the internet. Save the pennies and do it when you have to do a tune-up.

Before you jump on the Lexus bandwagon, you might want to go to a Lexus forum and do some research. If you think Nissan repairs are expensive, then you won't like paying more for the same repairs on a Lexus. Just a heads up.

I looked at the 350 back in 2018. Front seats didn't compare to the Murano's zero gravity seats, and I personally didn't like their automatic transmission. It had too harsh of a shift when getting on the highway, like they were trying to duplicate a manual. When they went to that awful gapping leaf catcher front end, that was the last straw to even considering getting one if I had to replace my Murano.

Good luck.

Have a good day.

 

[sistermoon2500]

When I do downshift, I just move the shifter and as soon as I see the RPM jump up, then I slowly press more on the gas pedal to come up to passing speed.

You ever watch those car show videos where the muscle cars leaving show off their power, burning rubber down the street being cheered on by a bunch of Idiots? And a few of them end up spinning out of control? Yea, well those are the guys who haven't learned how to properly shift and reapply power, wither it's an automatic or standard. They've watched too much street racing videos, where it's a straight line and the car is set up for that type of racing, full on power thru the gears. You'll notice that most of them that wipe out are factory race cars, Corvette drivers being the worse. They got the power, just never trained on how to properly apply it.


Unfortunately, you need to have the valve covers removed and new gaskets installed. If they're still leaking after being snugged down, it's a lost cause doing anything else.

Be prepared to replace the valve covers. They're made of plastic and get brittle after years under a hot hood, made even more worse if you live in a hot climate to start with.

Luckly, you can find them really cheap on the internet. Save the pennies and do it when you have to do a tune-up.

Before you jump on the Lexus bandwagon, you might want to go to a Lexus forum and do some research. If you think Nissan repairs are expensive, then you won't like paying more for the same repairs on a Lexus. Just a heads up.

I looked at the 350 back in 2018. Front seats didn't compare to the Murano's zero gravity seats, and I personally didn't like their automatic transmission. It had too harsh of a shift when getting on the highway, like they were trying to duplicate a manual. When they went to that awful gapping leaf catcher front end, that was the last straw to even considering getting one if I had to replace my Murano.

Good luck.

Have a good day.

Thx for the tips.
2 questions...
can you please elaborate more on how to use manual mode? I didnt understand very well. You move the shifter down when the RPM is high? then slowly press the Gas pedal? Can you please explain more? Id love to learn. thx
2: can you please link me to the gaskets? so i know what it looks like and where is it located.
Thank you very much

 

[Madness!]

I am really struggling with this. My air hose doesn't seem to have any air leaks, though I could try spraying a bit of water on there to find out, all hoses are tight up against their abutments, and maybe I calculated the fuel economy before incorrectly. I went with a value from the web (21.5 gallons total) and divided my odometer reading by half of that. I've since learned that you don't have to be at half a tank to measure fuel economy, you just need a sort of empty tank and to measure the distance driven and use whatever quantity you fill it up with next to do the math...

Anyway. Using the internet value I got 10 mpg. With proper measurement, I am certain that I am getting 15-ish mpg. I don't have any codes. No misfires, or really anything except this crappy gas mileage. I had a K&N air filter in there since I purchased it which I must admit I never cleaned. That will be happening soon, but I put a disposable filter in there earlier this week. I do feel the car has more power now. The VID seemed to give a better mileage and my calculations indicated better mileage. The only problem is that I'd been using the internet method for my computations up to this point so no reliable data until this point...

Any ideas? Tire pressure is good.

[SOLUTION: ]

Some background: I replaced o-rings on both bank 1 and 2 camshaft position sensors some time ago (this year); what I did NOT do was tighten down their retaining bolts ENOUGH, part of me didn't want to break anything and didn't possess a working torque wrench at the time. A post on Nissanmurano.org mentioned it requires 85 inch-lbs yes INCH-lbs, so when I get access to a proper torque wrench you can be sure I will make certain they are tight as necessary. My engine's performance in terms of gas mileage and plain ole power has been nearly halved for months, and it varied a lot.

Once I tightened them down a bit, I fired it up and was surprised to feel it back out of the garage without being forced to gun slightly, backed her out on her own accord. Gave both banks a bit more force and went for a test drive! 21.75 mpg mixture of highway and city. VID says 23.5 MPG but I'm not counting on that. It being like 60 degrees F here I noticed she warmed up visibly (quickly!) instead of remaining cold for at least five minutes like has been. Computed mileage was from set odometer and fill up.

I do love this vehicle! Need to stop monkeying with things, heh.

Final update. An idle air relearn procedure (preceded by throttle position relearn) brought my mileage back into spec. Apologies if anyone was mislead... my username aint what it is for no good reason

 

[Madness!]

Final update. An idle air relearn procedure (preceded by throttle position relearn) brought my mileage back into spec. Apologies if anyone was mislead... my username aint what it is for no good reason