Stumped.

[Bowesmobile]

Here's what I would do, replace wires. Get a lot of eelectronic grease for both ends (to spark plug and coil pack) look for motor oil or water in your wires (where is connected to spark plug). Wires will not give codes. And I never heard of the 4.6 being notorious for anything besides being the best engine for lasting the longest. I had one I sold for 1600 last year with 367*** miles and running strong

Well, I'm not going to argue with you. But there have been reports of programmers on the dyno seeing the spark knock happening in the reports. I hear it in mine and it can sound like a low tap on a tin roof. If you're not listening you can easily miss it. I stick to what I said. I dont know how to fix it without a refresh of the engine.

 

[IMINYOURCHAIR]

okay, I have an update, I changed the oil today and decided that I would pull the number 8 plug while I had my tools out. Here is what I saw.

After cleaning it off I took her for a spin with my laptop logging the live data. My program does not show number 7 or 8 on the misfire but the total misfire count gives me a rough idea. my total misfire was 68 with 48 going to number two and 1 to number three and six to number four. the remaining misfires I presume to go to number eight but it could also be number seven. the misfire is only noticeable (and also only counted on the live data) with a warm engine, and while in a city where there are multiple stop lights. I can come to a full stop and then give her 50-100% throttle and the misfire will occur for up to 20 counts then it'll start firing.

as of now I suspect the driver side coil pack that drives 2/8-7/4 and will be making room $$wise to get that fixed. I don't understand how it's only acting up when I get heavy on the throttle from a stop.