FleaDog Posted March 24, 2013 Share Posted March 24, 2013 95 legacy stock 190K miles I get that characteristic faint rattle sound of knock, pre-ignition, gas ping, whatever you want to call it at around 2250-2500 rpm under mild partial throttle conditions only, such as slowly accelerating or going up a hill. Most pronounced using 87 octane and gets about 50% better with 93 octane. its still winter grade gas here but this has been going on no matter what the season. Could this be a bad knock sensor - I know they can go bad and not throw a code. thx for any tips. Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted March 24, 2013 Share Posted March 24, 2013 could also be carbon buildup in the cylinders. Perhaps a SeaFoam treatment and knock sensor investigation to start? Link to comment Share on other sites More sharing options...
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