When pressing the gas pedal the engin will make this metal clink

HOW many miles on the engine (REDUX)?/? 3.5L V6 engine? or 2.5 or the Diesel??????????
I'd have to drive IT to know.
let me guess the mech tested the car and it ran OKAY, so says" I can't find the problem. " ( what else")
you never told what the engine does , when it does fail and is Intermittent.
just that engine is ON. (runs)
and car does not move, sometimes.
what matters first, only when it fails, is does ENGINE RPM RISE fast and high when it fails.
see how that works, if it did the transmission is slipping (CVT are not fun here)
2500 RPM when it fails, right foot in to the throttle pedal this is transmission slip (failure)
if RPM are low failed, that is engine failure. (lean burning) or EGR stuck on or other problems , many.

lost engine power. has lots of causes; but this is gas(petrol) answer.

1: engine failing ,top cause , VVT or that chain loud noise? ?
2: spark plugs bad over 100k miles, (not diesel)
3: fueling bad, even bad fuel, or goes lean due to fuel pressure loss.(low) fuel pump weak?


driveLine choices day1, new not told gen 2, 2007 car.

Gasoline:
2.5 L QR25DE I4
3.5 L VQ35DE V6 <<<, seen in USA is it?
Diesel:
2.5 L YD25DDTi I4 no 2010 first

TransmissionCVT (Gasoline)

6-speed automatic (Diesel) 2010 up/

try new spark plugs and spark cop boots? 100k service point is is. and gaps will be way off ,when old

boots are here.

checkout NGK here. on COP boots x6

https://www.rockauto.com/en/catalog/nissan,2007,murano,3.5l+v6,1434436,ignition,spark+plug+/+ignition+coil+boot,10150

Hi there,

The sound you hear, is it a whining, popping, grinding, scraping or rattling sound?
If you drive a manual transmission vehicle and notice a grinding noise, it can indicate the clutch gear is no longer disengaging correctly.

If you have drive by wire, It could be the TPS/gas pedal sensor or the vehicle is in limp mode. Have the codes read. If it is cable driven, the cable has popped off the throttle or the cable broke.

The Car comes to an stall when accelerating,pressing the gas pedal ...

https://answers.yahoo.com/question/index?qid...
Feb 7, 2007 - Sometimes when I press the gas pedal seems like nothing happens car doesn't accelerate at all only it loses the power and finally comes to a Stop, and sometimes it recovers (shakily) and keeps on truckin'. ... Does the engine shake andstall when you put the transmission into ... car stalls if gas pedal not pressed.?
Apr 11, 2013
my car stalls when i press the gas?
Apr 6, 2011
Car stalling after pressing gas pedal while running?
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My car stalls when i press on the gas pedal.?
Jul 2, 2007
More results from answers.yahoo.com

What do you mean by builds up gas? Is this with the engine cold or warm? Does it happen every time you press the gas pedal or just sometimes?

This is not really a car question, but you are probably right on your hunch. There should be a switch under the floor that is connected to the gas pedal. There may also be a switch in the linkage where it makes contact with the engine.

It could possibly be a throttle position sensor that is going bad in one spot. When it gets on one bad spot the ECU will get a signal saying that the throttle is completely closed and cut off fuel.

check air pipe at mass airflow sensor for cuts/ replace fuel filter

Ignition distributor caused problem. Rotor element needs replacement.

its your lifters. not a serious problem. but it can be. they are what control part of your pistons.
just use better oil. and change it more often.
it happens in alot of hondas