Originally Posted by jeep_creep

Anytime, I just wish I got more info on it so I can do it myself and mabey find a way to prevent it. Keep me posted on what you find

Originally Posted by m998dna

What brand gas? Try running a bottle of Chevron Techron in a full tank and see if it improves...

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Originally Posted by m998dna

Good idea m998dna... I think I'll try that myself.

Seriously... my first thought was why would someone install a CAI and opened up the exhaust without installing a tune? or did you forget to say you did that?

I always thought timing, higher compression ratios (10:1 and above) and cheap fuel (low octane) contributed to pre-ignition. And if the combustion chamber got hot enough it could diesel (run on) when you turned off the motor ... because that's how diesels work. Lower grade fuel, high compression ratio and high heat makes it "run-on" like a diesel is designed to function. Without spark to ignite the fuel...

So, if you run some fuel system / injector cleaner through your tank that was suggested a few times, you might fix the root cause, like maybe cleaning some dirty injectors and carbon that may be contributing to your problem... again, try Chevron Techron or its equivalent. Maybe the BG44k stuff will work like a charm - what do you have to lose? Just pour it into the gas tank...

Start from the ass-end and work up is my motto...

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Originally Posted by bubba_zenetti

Pre-ignition WILL melt holes in pistons in very short time. The fact that everyone is driving around with this sound and no one has melted a piston of done some sort of damage like crack a ring land is pretty amazing.

It does not take long for pre-ignition to cause damage. Especially on an engine with cast pistons.

No loss of power and its pre-igniting. There is no way. Pre-ignition will trigger knock retard events that will pull timing out. This will create power loss. Pre-ignition also casues power to drop shaprly from the event itself as proper combustion is not happening and you are having 2 spikes in cylinder pressure at the wrong times. If you are getting pre-igntion events it will cause a drop in power you can feel.

Even if you buy mule piss for gas, that ethanol they add to it has a knock resistance of around 110 octane. Believe me it is not due to poor gas quality. Modern vehicles are tuned for the lowest common denominator.

If this is something that is happening only to 6 speed guys, all I can say is you may be lugging the motor if all else checks ok.

Originally Posted by itsajeepthing91

How can you be lugging the motor at high rpm? I'm sure the tires don't help but I just can't see that being the reason

Originally Posted by itsajeepthing91

I said a couple of times that I put a bottle of sea foam in my current tank of gas. Sea foam can be used to clean injectors. I have a superchip but I have only ever used it for diagnostics and speedo recalibration. Whenever I run a tune with it I get major pinging.

Originally Posted by m998dna

This is what I read in your first post >> "Still pinging than I tried seafoam down the brake booster line..... Seem to have noticed some difference but still pinging."

So why would you install a CAI and open the exhaust and not recalibrate with a CMR tune? I don't understand.

Your above statement is a good clue that you get pinging when you load a tune... what tune? and what octane gas is it programmed for?

Maybe you need to take it in for a PCM flash at the dealer... take the CAI off and get back to basics. That shit doesn't do much for your 3.8 other than make more noise.

Good luck.....

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Originally Posted by itsajeepthing91

50,000 km on it with exhaust and intake and it's just started pinging I don't think they are the cause. I put sea foam in the tank after my first post.