Question about 2003 Nissan Maxima

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Engine knock 1999 maxima

My 1999 Nissan Maxima engine knocks when I go uphill or accelerates. I am using premium gasoline (RON95) and there is no fault code with the computer. I have tried changing to cooler spark plugs, decarbonising the engine and checking the ignition coils, all to no avail! Finally, I cleaned the MAF, and everything is alright!
It appears that I am using K&N air filters and some fine powdery dirt got accumulated on the MAF wire.
The car runs fine since.
By the way, when the MAF is dirty, the onboard computer cannot get an accurate assessment of how much air is going into the engine. So, less gas is sent into the engine. When going uphill or accelerating, the engine is "starved" of gas and knocks.
Nissan garages could find a squat of the problem!!! Totally unhelpful!!!

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Mate check your timing.it could too advance bro.have that checked and i think it should be allright

Posted on Oct 03, 2009

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What kind of gas does a maxima 2001


According to page 10-3 of the 2001 Nissan Maxima Owner's Manual:

FUEL RECOMMENDATION
Unleaded premium gasoline with an octane
rating of at least 91 AKI (Anti-Knock Index)
number (Research octane number 96)
If unleaded premium gasoline is not available,
unleaded regular gasoline with an
octane rating of at least 87 AKI (Research
octane number 91) can be used.
However, for maximum vehicle performance,
the use of unleaded premium gasoline
is recommended.

Engine "knock" is not just an unusual sound - but over time can cause real damage to the engine. You *should* use fuels with the recommended octane levels, but if you choose to use fuel with a lower octane level due to reduce fuel costs - do not repeatedly use fuel that causes engine knock. Find the "sweet spot" between the cost of lower octane fuel and an octane level that does not cause knocking. Expect fuel economy and performance to drop with lower octane fuels, too.

Good luck!

Feb 12, 2012 | 2001 Nissan Maxima

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How do I test and change a bad ignition coil in a 99 Maxima?


Im having the same issue w/ my 99 maxima. had the problem 2 months ago, they replaced coil, changed plugs, told me that I would still get knock sensor code but dont worry about it. Now the rough idling and check light flashing is happening again.

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sounds like engine ping use better gas see if that helps. If not check you engine bay when accelerating.

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Your knock sensor is located Under the hood, center, front engine area, below intake manifold, mounted on block.


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To replace the knock sensor:
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what you are hearing is a spark knock or detonation. its not going to hurt anything or cause any damage. if you want to get rid of it than run out all the fuel that you have and fill up with super and see if it changes with premium gasoline. if you look at the fuel door on the inside, it sais premium fuel recommended. also stay with NGK (nissan)spark plugs. You may also need the r/h side rocker cover. the one by the fire wall. the seals inside the cover leak oil into the spark plug hole and you will need to replace it if you find oil in the hole. let me know what you find.

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