Confronting P0304 Code A Step-by-Step Battle Plan for Diagnosis and Repair

A friendly local garage pulled codes, P0302 and P0304, cylinder misfires. We erased. Switched plug wires around to assess. Ran for check engine light, and ... I recently got a 2002 grand prix 3.8l non supercharged. Ive been getting a engine misfire code p0300 and p0304. Ive changed out plugs and wires, put in new ... I would only replace ignition coil on cylinder 4 and replace all of your spark plugs. With fresh spark plugs you can expect the rest of the coils to last long. The PCM has determined that a misfire has occured in cylinder #4. First of all, #4 should be on middle driver side correct? What would you guys check first? That code has two possibilities: 1. Spark: Bad coil, bad spark plug, poor primary connection to coil, primary wiring issue 2. Inadequate fuel: Fuel filter, ... I think it was the selection of a looser interference fit on the valve seats for easier construction, and poor valve locks. Overheating the ... P0304 Code: A Comprehensive Guide to Fixing Cylinder 4 Misfire Description: Welcome to our DIY Car Repair channel! hi to all i have a 2002 VW Passat estate 2.0. i recently had the code p0304 come up misfire cylinder 4 and replaced the plug furthest away ... I am looking for a little help diagnosing a P0304 code and flashing CEL I keep getting during track events with my 2022 Mach 1 6spd. I got a CEL with the P0304 code on cylinder 4. I googled around and many people pointed out spark plugs and coil packs. I replaced them and I'm still getting ...