What causes the Envision to shake and vibrate excessively during cold starts?
2 Answers
The Envision shakes and vibrates excessively during cold starts because the engine idle speed is relatively high after a cold start, leading to noticeable vibrations. The high idle speed during cold starts is not a malfunction but rather an intentional design by engineers to allow the engine to warm up quickly. In terms of interior features, the Envision maintains Buick's signature high-end interior quality and introduces a newly designed 10-inch HD touchscreen, enhancing the technological feel. The vehicle is also equipped with multifunctional front seats, adjustable and slidable rear seats with reclining backrests, a large split-center storage box, a heated steering wheel, and a two-piece panoramic sunroof. The Envision measures 4,686 mm in length, 1,839 mm in width, and 1,686 mm in height, with a wheelbase of 2,750 mm.
I've been driving my Enclave for several years, and the severe shaking during cold starts is quite annoying—it feels like the entire car is wobbling. This issue is typically related to the engine's cold state. When starting, the oil film hasn't formed yet, and the poor fluidity of the engine oil increases friction. If you often drive in cold areas, excessive carbon buildup can worsen the shaking—clogged fuel injectors or poor fuel flow can lead to an uneven air-fuel mixture. Ignition system problems are also common, such as worn-out spark plugs or weak ignition coils, making it harder to start in low temperatures. Another possibility is worn engine mounts; when these rubber components age, their damping ability deteriorates. Personally, I recommend preheating the engine for a few minutes before parking in cold weather or using higher-quality engine oil. Ignoring this issue long-term could damage the engine, so it's best to visit a professional shop for throttle cleaning or part replacements to prevent more serious failures.
