Slight loss of power at 2000rpm - Nissan Armada Forum: Armada & Infiniti QX56 Forums
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post #1 of 6 (permalink) Old 07-13-2017, 05:52 PM Thread Starter
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(Sorry for all the questions. If i had the money to go to a dealer i would.)

I noticed that while climbing to 2000 rpm there is a "flat spot" then it is gone. When decelerating that same spot is noticeable...it almost feels like it wants to stall or cut out. Only in that very short of about 1800 to 2000 rpm range way before 55mph.
To me it seems maybe a trans gear is slipping?
But because i feel it while stepping on the pedal i feel it might be engine related.
Anything i can look at? Clean a maf sensor?? Pour some seafoam in the gas?
I recently had the engine go into that limp home mode. Shut it off and it was fine. 2 codes came up , i can post them later. Problem was noticeable before this limp issue.
I have some long trips coming and dont want to get stuck.
Thanks in advance


Last edited by marctronixx; 07-14-2017 at 09:29 AM.
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post #2 of 6 (permalink) Old 07-14-2017, 09:35 AM
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I don't know anything about your car in terms of year, mileage, if you are the only owner, etc... but ill offer my input...

Looks like you could use an ECM reset. There's a pedal press/key ignition dance you can do to reset this. Its on this forum (I've posted it a couple times in some threads over the years) or over the wide world. Threes also an idle air and pedal /throttle reset procedure on that same post. Definitely try that!!!!!

Other things...

Petrol pump old? May need replacing.
Yeah MAF could be dirty
Coil packs? Sparked plugs? Yeah
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post #3 of 6 (permalink) Old 07-14-2017, 12:06 PM Thread Starter
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2004 se, bought used in either 2012 or 2013
134,000 miles

I'll look for the ecm reset. Thats different than the service engine light reset? Ive done that so far.
I think i read about accelerator pedal reset.
Just recently replaced fuel pump.
I dont know anything about coil packs.
Im guessing the previous owner (he was a manager at a dealership) did something to give the car more performance...a chip maybe? I dont know,,it seems very fast and the mufflers are somewhat loud.
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post #4 of 6 (permalink) Old 07-15-2017, 06:57 PM
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the car is fast on its own, but sure he or she could have done something to modify things.

the ecm reset will reset the values of timing, air/petrol mix, etc... the ecm reset is easy to find.

i understand you don't want to spend cash on taking it to the dealer but its what 80 dollar diag fee? i think that is good money to invest in--let them find potential issues and then you come back here with the results.

you can also search for titans of the same year and qx's of the same year as they were all made on the same line in alabama.

this car has a lot of data on it out in the internets, so should be easy to find results online...
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post #5 of 6 (permalink) Old 07-15-2017, 07:19 PM Thread Starter
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Thanks...i'll think about taking it in, once i get some free time
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post #6 of 6 (permalink) Old 07-16-2017, 12:01 PM
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i hear you...

but yeah let them do all the heavy lifting of finding potential issues ands then if you are competent mechanically just tackle them yourself. many folks on this forum who are DIYers find the car easy to work on for the most part (some cats have even taken the dash apart for HVAC issues!) , so i think you are in good company.

but trying to figure out things over the internet is a losing battle as there could be any number of rabbit holes to go down to search for a fault. nissan has the consult software and can find things in a nifty.
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