Low RPM rattling, clatter sound ??? - Nissan Murano Forum
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#1 Old 02-02-2009, 06:38 PM
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Unhappy Low RPM rattling, clatter sound ???

Hey guys I'm fairly new to the site and had an engine related question. My wife has always loved her Murano but recently upon acceleration, the engine has been making a clicking or valve rattling sound at 1200rpm - 1400rpm. It only happens at 1200rpm - 1400rpm, after that nothing. At idle there is no clicking/rattling sound and at high RPM or under load their is no clicking/rattling. It only happens on light acceleration when feathering the throttle. When I floor it from a stop, there is no clicking/rattling at all. Any and all suggesstions would be helpful???

I think it may be the fuel injection dampers or maybe the knock sensors???? But it only happens at light throttle from 1200rpm - 1400rpm. Weird....please help???
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#2 Old 02-02-2009, 07:00 PM
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tubbedz-

Welcome to the forum!

I think you may have nailed it - fuel damper. The MO has two (2) fuel dampers.

Here is a link that discusses the problem in detail: Engine sounding a bit loud.

-njjoe

2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
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#3 Old 02-03-2009, 12:03 PM
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Quote:
Originally posted by njjoe
tubbedz-

Welcome to the forum!

I think you may have nailed it - fuel damper. The MO has two (2) fuel dampers.

Here is a link that discusses the problem in detail: Engine sounding a bit loud.

-njjoe
Thanks njjoe

I thought it was the fuel dampers. I read the thread you suggested. When briefly accellerating from a stop, my Wife's Murano sounds like my old Chevrolet small block with it's valves loose and not adjusted. I hope this is the fix as the dampers are about $100 - $140 each and difficult to get to!!!
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#4 Old 02-03-2009, 01:53 PM
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Hi everyone! I still haven't pin pointed the "rattle sound" at 1200rpm but am leaning towards the fuel dampers.

I searched the forums with common issues and found the thread below. Do you think I need to have my ECU reprogrammed ???

slow speed Throttle acceleration clicking type noise

posted by lilazndemon20

Anyone??? Suggesstions???
Take it to the "Stealer" ???
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#5 Old 02-03-2009, 07:12 PM
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I found another Post from 2007 with the same issue that I am experiencing. See thread below.

Weird clicking noise at 1250 rpm

The same clicking/rattling sound happens to my wife's Murano at 1200rpm on light acceleration. It doesn't click/rattle at 1200rpm in Park. Also it does not click/rattle under full throttle hard acceleration.

Anyone with a suggestion???
Someone must have gone through this also????
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#6 Old 02-03-2009, 07:42 PM
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tubbedz-

A sure-fire way of determining if the problem is with the dampers is to touch each one as the car is making the noise. If the vibration coincides with the noise then it is the damper.

If it is a damper you need to only replace one, not both.

-njjoe

2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
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#7 Old 02-04-2009, 05:27 AM
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Quote:
Originally posted by njjoe
tubbedz-

A sure-fire way of determining if the problem is with the dampers is to touch each one as the car is making the noise. If the vibration coincides with the noise then it is the damper.

If it is a damper you need to only replace one, not both.

-njjoe
njjoe

I narrowed the problem down and it is not the fuel injection dampers.

With the parking brake on, I had the wife start the car. With her left foot on the brake and her right foot on the gas, I had her depress the gas pedal until 1500rpm. In Park, the car revved up smoothly with no rattle. Next, I told her to put it in Drive and again slowly depress the gas until 1500rpm. Now in gear, and with a load on the engine, the engine made the loud rattling sound. With the hood open, and with both hands holding the dampers, an awful mechanical clanking sound was coming from the front valve cover. The valve cover closest to the radiator. It sounded like a very loose rocker arm that made clunking sounds under engine load.

Now the next thing that ran through my mind was.....does this engine have an adjustable valvetrain??? Should I check valve lash???? Did a lifter collapse? Did the camshaft round a lobe? Did the timing chain tensioner loose it's tension??? Help!!!!!

Any hardcore Nissan engine guys want to take a guess on what's wrong as I'm not sure what's going on ?????

This weekend I will pull the front valve cover off and take a deeper look.
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#8 Old 02-04-2009, 02:27 PM
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tubbedz-

Fortunately, the noise is coming from the front bank. I would hate to have to work on the rear bank.

Let us know what you find when you lift the cover.

-njjoe

2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
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#9 Old 02-06-2009, 09:40 PM
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Update.....

I went to see my friend, who is a Mechanic at Honda and we hooked a scanner to my Murano. Apparently, the noise is pinging or spark knock. In Park, while revving, the timing advanced smoothly from 17'degrees and up. In Drive, while revving, the timing was eratic and flashed up real quick to 43'degrees. This was too much advance too fast, creating the pinging or spark knock. My friend suggested to check on the Nov 17, 2003 recall that replaced the cam and crank sensor and the variable timing control sensor. Also he suggessted that I have the ECU reflashed.

I have an appointment next week at the Nissan Dealer to take care of these issues. Hopefully they will not give me any hassles.
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#10 Old 02-09-2009, 10:33 AM
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You know I have had this problem before and had the feul dampers replaced.

I think its from low oil. Ever notice it happen after you make a long left or right turn?

I had it happen 2-3 times, and after the fuel dampner was replaced I just happened to check the oil. I barely had anything on the stick. So after adding oil.. no more problem.

My problem now is that I seem to add about 1.5 -2 qts between oild changes. I change oil usually around 5k miles too. And there is none leaking that I can see or smell.


jason
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#11 Old 02-09-2009, 10:49 AM
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Quote:
Originally posted by jwa95ta
My problem now is that I seem to add about 1.5 -2 qts between oild changes. I change oil usually around 5k miles too. And there is none leaking that I can see or smell.
That is way too much oil to be adding between changes. How many miles are on your MO??

-njjoe

2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
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#12 Old 02-09-2009, 10:55 AM
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Yes I agree!! I think we have 75k on it? Its my wifes car, so I only see it on the weekend.

I would think that I really started keeping up with that oil consumtption in the middle of last year. I just know between the last oil change and now (time for another change) I have put just about 2 quarts in it. I usually add a half qt when I check. But I was reminded by the dreadful "rattle" last week to check the oil :O

I have extended warranty on it, so I guess it will be making a trip to the dealership. But I just dont have faith in them finding anything.

I have seen cars need 1/2qt to 1 quart before oil changes. But not like last time with 2 qts.


Jason
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#13 Old 02-12-2009, 01:31 PM
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Finally got the wife's Murano back from the dealer and paid $300 for nothing. The dealer had the "engine mechanic" diagnose the Murano. He verified the engine pinging noise. He checked for intake leaks-none. He attempted to"relearn" the idle but failed. So he reprogrammed the ECM with new software and then "relearned" the idle. Engine pinging still there. Nissan mechanic found a dent in the oil pan. He said the ping was from lack of oil because the pan was dented......BULL. If it's not the pan, he suggested a new replacement engine. Why????? So I took the Murano home and replaced the pan. Engine oil pickup was not bent or crushed. With the pan off, I looked at the crank, rods, and bearings....it was spotless, no sludge, no oil burning or oil stains. The bottom of the oil pan was also clean...no sludge, no shavings....just spotless. Called the dealer today and left a message for the mechanic on what he advises to do next. In the meantime.........anyone have any ideas???
No codes or warning lights
No pinging in Park or Neutral
No pinging at high speed or nailing it from a dead stop
Pings only at part-throttle load approx 2000rpm
92 Octane Chevron unleaded
Royal Purple synthetic oil 10w-40w
No oil consumption issues
No blue smoke out of the exhaust
Nissan oil filter
NGK platinum plugs
MAF cleaned
Throttle body cleaned
New Nissan air filter
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#14 Old 02-12-2009, 03:05 PM
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tubbedz-

Dented oil pan causes the engine to ping?? A replacement engine is required???

You just have to love the new breed of dealer mechanics. If there is no error code telling them what part to replace they are lost.

Troubleshooting is fast becoming a lost art.

-njjoe

2005 SL AWD, Platinum
-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
-Valley Industries hitch and wiring harness
-Aluminum fuel tank shields
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#15 Old 02-12-2009, 03:53 PM
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njjoe

I feel the same way.....these new breed of mechanics are too lazy too troubleshoot and instead wait for a code to pop up. WTF

These guys could have hooked up a Consult 2 and checked every sensor or the timing or fuel pressure or the ECU......instead I should buy a new motor, how'd he diagnose that??? He didn't even pull the plugs!!
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