Michael J. Drake Posted August 29, 2019 Report Share Posted August 29, 2019 Have what sounds like spark knock when taking off from dead stop. Quote Link to comment Share on other sites More sharing options...
Gadgetjq Posted August 29, 2019 Report Share Posted August 29, 2019 (edited) Welcome to the forum! Modern engines use sensors to detect pre-ignition way before we can hear it and dial back timing. "Spark knock" shouldn't happen without getting an error code indicating a sensor has gone bad. That said, I don't know what else might be happening that sounds like pre-ignition when accelerating. If you have a code reader or auto parts store that'll let you borrow one you might want to check it for 'pending' codes. Edited August 29, 2019 by Gadgetjq 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 30, 2019 Report Share Posted August 30, 2019 how many miles on your Edge? have the plugs/coils/pcv valve been serviced yet? could be bad fuel or sticking injector(s). if this just started happening, check to see if a changeover to winter fuel has occurred in your area. run a bottle of HEET (yellow) thru the tank, see if that helps. does the CEL flash at any time during this event? Quote Link to comment Share on other sites More sharing options...
ishoottrap Posted December 5, 2019 Report Share Posted December 5, 2019 In my wife's 2012, I got pre-ignition knock when it was too lean due to a bad MAf sensor. Eventually it threw codes for the too lean condition and the check engine light came on. Check your fuel trims and see if they're pegged positive. Quote Link to comment Share on other sites More sharing options...
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