Detonation under light throttle
#1
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I have a 99 5.3 with only a dynomax exhaust and intake mods. It has a problem with knocking under quick accel. If im cruising around 45 or other highway speeds and tap the go pedal a little it will start pinging for 2-3 seconds and feel weak then pickup and go. Also sometimes it will rev up 3 to 400 rpm when i do this and take off then fall back down to where it was in revs after a second. That kindof feels like the tcc unlocks and locks back up really quick. I have did seafoam,maf/tb cleaning/plugs/fuel filter/fpr. None helped.
#3
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Originally Posted by snakeoiler
What octane gas are you using? I was using 89 and I would get ping similar to your situation. I started using 93 and haven't a thing (or should I say a ping) since.
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Mine does that too, but I actually don't "think" it's KR. I think it's more of an odd tuning thing with the TCC. I modified my TCC lock and unlocks, and haven't noticed it doing that in a while.
#6
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Originally Posted by 02denali
if it is a 99 model as you said then they are notoriuos for knock. i think most are swapping out the 02 pcm's for these 99's and are having good luck except for the battery light.
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