Coolant leaking into cylinder head and causing misfire in ignition coil 4. Car is using mass amounts of coolant but no leak. Codes are reading misfire in 4th ignition coil as out lined in the following: TECHNICAL SERVICE BULLETIN 1.5L EcoBoost — Low Coolant, White Exhaust Smoke And/Or Illuminated MIL — Built On Or Before 06-Apr-2019 19-2139. Yes it’s available on request. The car would studder while running in traffic causing people to stop short or significant risk of being rear ended because the car would not excelerate as built too. No. Vehicle has not been inspected by manufacturer, police etc. It has been confirmed by an independent service person. MiL light came on. In March and coil 4 closest to the cylinder was replaced. The problem resurfaced April 19th 2025 and it was looked at again. Once again coil 4 was misfiring again and the plugs were looked at again and they were corroded with coolant even though they had just been replaced March 2nd. This is a known issue with Ford they are well aware and choose to do nothing even though there is a specifically detailed TSB 19-2139 detailing the very issue that is going on with my car.