The PCM will increase your timing, so you're going to need mods/higher octane gas to kill the KR. KR is knock retard - the motor is detonating or "pinging". Basically, the pistons are getting hammered with larger explosions. The PCM senses the detonation with the knock sensors, and pulls timing to keep your **** from blowing up. Each degree of KR pulls one degree of timing. Less power, less powerful detonations, it basically saves your pistons from being busted into pieces.

Every car is different. Some will see instant KR at full throttle, some won't. Before my ported heads, I had 9 degrees of KR, anytime I even attempted full thottle. Now I may get a blip of .5 degrees. IDK bout the oil, but I'm pretty sure you should just use the oil filter that's made for your motor - swapping it out with a larger one won't help much, if any at all, with your KR.

Braking does not make the motor have KR. KR does not occur while your foot's not on the gas. I'm also not with you as far as the octane booster goes... How many octane points is it? You might as well just use Seafoam, it'll at least clean something. And yes, a clean air filter always helps the motor breathe better.

You will get KR sometimes, but if you have a good tune, you won't see KR unless it's hot outside and you've been driving the car for a while.

And FWIW, each degree of KR your PCM is sensing makes you lose 3 horsepower. And you don't have the performance that you had before that KR was sensed. I believe you have to let the car cool for 15-30 minutes to restore that lost performance due to the knock.

Edit - you need a scanner that you plug into your OBDII port to know how much KR your motor is getting.

Hope this has helped.

 

alright...ill try what you told me then haha

 

Gothkid, don't you have a 3800??

Mod first, PCM last.

 

^^^^^^^^

 

IMO, there is no sense in getting a pcm that increases timing if you don't run higher octane gas to take advantage of it.

Honestly, if the tune is done correctly, you should be able to floor it without KR. Obviously a canned pcm tune isn't going to be able to do that though.

Link to this info? You should never have KR unless you're at WOT or heavily lugging the engine (up a hill, etc); definitely not off the throttle completely.

If you want higher octane, run premium fuel.

 

Everything I posted, I was told to do so by NAPA like I said. I tried to emphesize that so you all didnt think it was coming from me like I knew from expierience. The octane booster I was told has some exrta stuff in it to help out also. Now you all know Im not the most knolegable when it comes to these things, I know some and Im learning each day, but I tend to belive things when I hear them from shops and such. The guy told me this whole explaination on how the hard braking creates KR, but of course Im gonna belive you guys more. But anyway, sorry for the misleading info.

 

Octane booster is also a waste of money. If you use octane booster in 87 octane, you increased it to 87.1 octane.

If you NEED to put something in your gas tank to feel better, throw a can of seafoam in, then fill up the tank every 10K miles

 

LOL I wish I could get 10k miles for every tank of gas... What ever could be your secret?? JK LOL

 

haha, I guess it could be read that way :P