So I’m about to begin chasing down a P0304 misfire code with a noticeable engine knock on a ‘01 with 298+ on it. Brief history: Family passed down since purchase, this was a dealer base model used initially for test drives/dealer service loaner for the first 1000 miles or so. No frills classic white but great to drive. Outside of regular maintenance: Traction battery full replacement ~2012 Wheel bearings replacements all around- front 2019 back early 2020. A laundry list of smaller repairs and standard maintenance between then and now... Car grew up in IL/KY before moving to the harsher NE and driving NY/VT/NH/ME the last few years and visiting everything East of CO lol. Spark plugs I just changed our and it’s running a bit smoother all around naturally. Equal wear and nothing stood out. At idle it’ll run smooth but driving it’ll start misfiring at about ~35mph. I plan to replace the original coil packs next but thinking it’s probably a fuel injector based on what going on. A: Would anyone happen to have the firing sequence of the cylinders B: Thoughts recommendations before I eventually drop it off at the shop, as I don’t have the equipment/space to tackle that job currently. Ideally want to take care of the misfire and get it back to my daily driver so I can hit the 300 mark. Thanks in advance
Before you just replace the coils on a guess, it's easy enough to just swap the #4 with another one and see if the misfire moves with the coil. I don't know the firing order, but it doesn't matter for this (so long as you only swap the coils rather than any of the plugs for the coils).
