Quote:
Originally Posted by ZMEnow
Do you have a record of the antifreeze being changed, dexcool has a 5 year limit before it starts to coagulate.
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Coincidentally that
was approximately five years ago lol.
My plan for the year was to drive it through the summer and then do a full flush/fill in ~October, along with the next oil change, as well as a visual inspection of plugs/wires.
I am hesitant to blame the coolant for the code though, if I'm honest. Unless you think some kind of buildup has occurred on that side of the engine and is causing hot spots in a cylinder or two. No reason temps within normal operating range should cause a knock sensor code to be thrown in my opinion. Especially since it
has run hotter before. These couple drives were hotter than normal, but in Texas summers sitting in traffic after being on the highway for awhile will get it into the upper 220s where the fans promptly kick on and bring it down in less than a minute.
I'm expecting the source of the problem to be fuel or spark related, leading to some actual knock and a cylinder (or cylinders) on that side to run hot.