What are the reasons for the intake camshaft position delay in the Roewe 350?
2 Answers
The reasons for the intake camshaft position delay in the Roewe 350 may include a stuck oil pressure control valve (OCV), mechanical jamming of the CVVT actuator gear, wear of the oil pump, a stuck oil pump pressure regulating valve or system blockage, incorrect timing belt or chain alignment, or abnormal current in the VVT control circuit. Below are detailed introductions about the Roewe 350: 1. Overview: The Roewe 350 is a compact sedan positioned in the A-segment market, launched by SAIC Motor following the Roewe 750 and Roewe 550. It is also the first Roewe family car to incorporate 3G technology. 2. Powertrain: With the application of new technologies, components such as the chassis, engine, and transmission have been optimized and improved, achieving a fuel consumption of 6.9L. The 1.5L engine, in conjunction with an MHI turbocharger, can instantly deliver power comparable to a conventional 2.0L engine.
I've been repairing Roewe vehicles for over a decade, and intake camshaft position delay is quite common in the 350 model, mostly due to timing chain issues. Over time, the chain can become loose or skip teeth, directly affecting the camshaft position sensor's ability to read signals accurately, causing the ECU to mistakenly detect a delay. Additionally, poor-quality or insufficient oil leading to inadequate lubrication can cause camshaft wear, resulting in this problem. Owners often complain about weak acceleration or the check engine light coming on. It's crucial to promptly check the chain tension and sensor connections to avoid damaging the engine's core components. For example, an ECU programming error can also lead to misjudgment, requiring professional diagnostics. Don't underestimate this issue—it can be very dangerous while driving.
