misfires

Hi guys. I have a Renault clio 1.4 2006. Service light flashed up so I scanned the car and it gave me a P0304. I swapped the coil pack for cylinder 4 with cylinder 1. Drove the car, scanned it and no codes came up (service light stayed on). I scanned it a few days afyer and still no codes came...

Hi, I have mk6 golf TDI 2010 At around 100k miles I started having this problem where the car struggles to start. Almost sounds like it's mis firing (it's not a petrol though) When I start the car it sound like it is running off 3 cylinders but after a short period of time it runs...

VW Golf mk5 2.0L fsi engine 2004 ~93000 miles Currently the car misfires on every gear. The diagnostics tool said cylinders 2 and 4 were misfiring. The codes that showed up were p0300, p0302, p0304, p0599, p1031. I'm pretty useless when it comes to engine problems so any help will do. Thanks!