ok.......when i get on the gas easy like a little under 2 grand i hear almost like a raddle but i was told it was engine knock?? i thought maybe a heat shield how can i fix this??? also one more thing if i start my car when the car is cold and go to go it wont go right away normal or tranny problem? 02 se with under 50K thanks in advance

 

Read the onwers manual .. it's "normal" from 1-2k ... what grade of fuel do you use?

 

I dont even understand the ?

 

Same here.....

No offense pimpinmax, but could you restate the question in a more comprehensible manner?

 

I may have a similar problem. When you drive the car under 2K (which my wife does and complains about it! She says is preignition) the car makes a sound like a Pinging or a knocking sound. A quick stomp on the gas will make the sound go away. Will any damage occur if you were to continue with this noise.

Yes, i use 93 or higher, and I even brought it into the stealership (at my wifes request)-No problem found.
I changed out the plugs at 50K, the car has 86K at this time. Run techron cleaner every 3 months, but have used the BK stuff from Nissan once.

I am going to order a new MAF to see if it clears it up.
I was going to pick up the sea foam but didnt do it yet.

 

So what is the problem, i don't get it

 

ok here we go..... step on the gas in drive it makes a loud sound like metal is rattling. but only happens under 2K RPMs im using regular gas but every few i toss the good stuff ive already done the sea foam and nothing. I want this sound gone it makes my car sound like a POS

 

That sounds diff. than my problem. Sorry about the hijack-the "engine knock" caught my eye. I figure my pinging if from my local gas -it may be bad


Here is whats next:

1. Replaced PCV Valve with irishs "PCV Blowby Oil Catch Reservoir"
2. Order MAF from D.B.
3. Install my new Y Pipe (when i get my leg cast off),
possibly replace o2 sensors at that time.
4. Finally get it dynoed @ SPI Pwer Excell, $85/ 3 pulls (install new MAF between runs if he lets me)

I still wonder about the coil/o2sensor TSB for the 2000 Maxima - as I recall,
one of the symptoms was excessive pinging. A google seach will pull up lots of info on pingin in our engines.

sorry about going on.....

 

If I remember correctly, which I'm not sure of, it's something with the headers or header gaskets or even cats.

 

The only rattle I had was from the heatshields.... I took them off, no more rattle