Hey guys have done new spark plugs, new coil packs, new hpfp's, and installed injectors on cylinders 5,6,8 and still getting misfires on my 19 benz GLC 63 amg with 75k miles. Can someone tell me what else could it be?
Hi, check for false air intake at the intake manifold seals, check for a weak valve spring, also try a higher grade gasoline, check the evap hoses for cracks,check egr ,are there more codes other the p0300 305 306 307 ?