I wanted to know if anybody else had a problem with spark knock on take off. It is not too bad. I fill up with Exxon 87 octane gas. I used gas treatment in the last two tank fulls and still have the knock. I went to the dealership and they said that there was a computer udate that came out and would fix the problem. They said it would take about an hour to fix. I wanted to know if anyone had heard of this? Thanks

 

I do when it is cold out.Under a load. Clears out once it is warm i'm just going to change plugs and wires.

What year do you have?

 

I have an 08 with an Automatic transmission

 

Hmmmmm.....that's interesting. Have never heard of anybody else reporting that. I've got a 07 X w/ auto.....never heard a knock yet. But I do believe the gearing is different than yours? I have 4:10s

I remember in the "old days", the only time I would hear a spark knock was when going down to lower elevation from living at over 6k feet. If I didn't use hi octane it would knock do to it being tuned at high elvation. Could it be that your computer doesn't have the timing exactly correct?

 

Get the ecu reflash the dealer stated there is a fix for it. There might be other problems fixed that you don't even know that you have.

 

Yes, I get it off and on. It sometimes goes away on its own.

 

I get it a little if i forget to shift down and lug the engine a little.. at least i did in my 08.. i dont notice it in my 09 - probably has the later computer flash..
-Christopjher

 

I get alot of fluttery sounding detonation pinging while accelerating, the more load the more pinging.

I have an 08 Auto Unlimited, looking to replace with an 09 6-spd 2-dr though.

Cheers

 

mine has been pinging lately, I have almost 39,000 miles on an 08 Auto trans.

Im going to try a higher octane fuel next fill up and see what happens