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Low load/lift knock

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Old Dec 14, 2019 | 11:21 PM
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nor11384's Avatar
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From: tampa, fl
Low load/lift knock

Hey guys for a while now ive been noticing im getting low load knock from 3k rpm to about 4k rpm or so. I notice it happens mostly when im partial throttle through a gear getting into boost and when i get into boost a bit and let off or change gear. I kept messing around and trying to get it to do it and i notice that when i start to get into boost and let off the afr on the wideband goes full rich to about low 11's and bounces right back right away. Say im in gear getting into boost and i let off and throw it in neutral the wideband will go full rich and then it will sometimes hover around there a sec and then go full lean where you see --- on the gauge which is normal when you let off. When it does this, maptracer will show a very rich afr where i let off. Im guessing the sudden change in afr is causing knock when letting off? Is it normal for afr to do this when lifting off throttle? I was looking over the rom and was wondering in maybe the decel tables have something to do with it? anyone find a fix for partial throttle knock? I lowered timing around these areas by a good 2 - 4 degrees but still get random knock...





Last edited by nor11384; Dec 14, 2019 at 11:26 PM.
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