Yearly Archives: 2025

Motronic 4.4, along with most engine management systems, use a combination of mechanical and electronic systems to control boost pressure. This article explains: 1. The Three Pieces That Control Boost Boost control is dependent on these three components: You can think of boost control as a combination: 2. Wastegate Actuator: […]

The Volvo 5 cylinder whiteblock turbo motor came with three types of exhaust manifolds. Part #1270242009 was fitted to 1992-2000 engines. The ‘Japanifold’, part #9207688, was fitted to 2001-2004 engines. The ‘R’ manifold, part #30637921 was fitted to all engines 2004+. The firing order of the Volvo 5 cylinder engine […]