sclarke

For a fuller understanding of how misfire events are recognized, evaluated, and reacted to by electronic engine controls -- technical, but eye-opening... Document download link> Misfire Monitor - OBD Operation Summary for Gasoline Engines - 2016 Model Year.pdf Good luck! Haz- Lots of info on that misfire monitor including shutting off the one fuel injector. I haven't been able to schedule an appt yet with my local dealer though I've offered to drop the car off for the mechanic to just randomly drive when he goes somewhere (even take it home). Anyway, if it were the coolant issue that is prevalent, wouldn't that be a consistent problem and not a hit or miss problem as I seem to be having? Example, yesterday...37 degrees out...first trip from home didn't turn on heat or defrost (trips are small...5 minutes, 2 miles) it didn't have an issue. Second trip a couple hours later I turn the heater/defrost on and within a minute it starts hesitating/missing. Turn heat off, turn engine off. Cycle on and off a few times and it's good again. Now it will still occur without the heat, but it's more likely to happen if the heat is on. Again, it cycled this some last year, but subsequently it didn't surface from March to December so it didn't seem to be something involving the warmer temps or the a/c side of the system. But again, there would have been plenty of times there when I ran the heat still on cooler days, it just didn't pop up. It baffles me a little with it not being continuous. At least it seems better that it may not be the combustion chamber leakage. And no, when I changed plugs they all looked comparable. None no better or worse looking than the others. Which they would've only had about 25k miles on at the time.

First, I've got a 2016 Edge with the 2.0 Cleveland. Car currently has 35K miles. I'm the second owner as my father bought it new and didn't put a lot of miles on it. I've also got a P0302 code. I'm just now reading this thread and seeing all the mention of coolant leak which is not encouraging, but also not sure if that's where I'm at... My misfire started November 2021. Went to autozone and replaced #2 coil per their diagnostics. The car ran fine afterwards for a short while. When it started happening again, I swapped plugs and coils from #1 and #2 to see if the code followed the coil and/or plug. It didn't, the code stayed at #2. Eventually I ended up replacing all plugs and coils and in doing so noted no damage on either the plugs or coils. And thinking back, saw no signs of coolant... My last occurrence with this episode was in Feb 2022. Car behaved with no issues until it came back last month (Dec 2022). I've not noticed any smell or sounds of water. I looked at my coolant reservoir and it's low...it has about 2" of coolant in it whereas the minimum line is at about 3". I've never added any. I did an oil change last month and it was black...no signs of milkiness. I took it to my Ford dealer last year and they didn't find or suspect anything different as I relayed to them what I had done with the swapping of the coils and they couldn't get the car to duplicate the miss. And to add, I have successfully cleared the miss by pulling over and turning the engine on and off several times until the miss disappears (not feeling it at startup idle). I traveled on the interstate this week and the miss started on two different occasions...each time I was able to pull onto the side of the road, turn the engine on and off and continue on without the miss. It's also more likely to happen if I turn the heat or the heated seats on. Almost guaranteed to happen if I do those things. I'll top off the fluid and watch it and see if I have this going on. Seems likely on this thread, but I would've thought if there was a coolant leak, my level would be a lot lower?