Vehicles using B7JA engine list:

Engine B7JA, found in Ford Fiesta, Puma, and Tourneo Courier 1.0 EcoBoost models, commonly faces issues like carbon buildup on intake valves due to direct injection, causing rough idling and reduced performance. Diagnosis involves checking for misfires and performing a walnut blasting cleaning. Turbocharger wastegate rattle is another concern; listen for unusual noises and inspect the turbo actuator. Preventive maintenance includes using high-quality fuel, regular oil changes with synthetic oil, and timely air filter replacement. For mild carbon buildup, fuel additives may help, but severe cases require professional cleaning. Address turbo issues promptly to avoid costly repairs.