Thread: New Knock Retard

Originally Posted by Bluemagic

Boom booms?

It's an industry term.

Originally Posted by Bluemagic

Well after a little more digging if found that my ltft's are at 7.6 at wot. Iirc fuel trims should lock in at close to 0 as possible. Think I found my culprit. Real question is why. Why just out the blue?


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My fuel trims change depending on how much gas is in the tank as well, but always lock at 0 when going full throttle. I only get some kr during full throttle, with Bp. I used to work at a gas station and there are different factors involved when buying. Did the filling truck just leave before you got there, which mixing the crude on the bottom of the tank with the gas as it fills. Is the tank low on gas, which causes you to get some crude with your gas. Did the station check for water in the tank, which could mix with your gas. Is the station mixing the low grade with the high, to make more money. You get the point, Consumer affairs, which regulates station don't have enough personnel to check often enough and usually only comes around when they get numerous complaints. I usually throw some Seafoam in the tank once a year and keep some Torco race fuel concentrate in the trunk for those bad gas days. When I have Kr, the Torco always eliminates it. I wish Sunoco still made 94 octane, because that's what I would be using.

Originally Posted by matt5112

they still do, thats what I run.

It's hard to find Sunoco in my area, the ones that are close don't sell 94 and the attendants said the 94 was phased out. I was told it didn't sell well over 93, I guess it's an individual station thing.

Get thsoe fuel trims locked/dialed in.

Change in temperature always screws with sh1t.

Hence why I told ya to just leave the 3.5" and re-tune it back when you first started asking all your questions a month or so ago.

Then again, I probably told you toss the 3.4" on it and not care because engines are like a hundred bucks on CL...lol.

If you are needing a custom tune...this would be an ample time to hog out the blower and the TB just for shenanigans since it is getting tuned from scratch anyways...right? Buy a Wideband too?

Weeeeeeeeeeeeeeeeeee, then just run the 3.4" at that point...should be easily tunable.