Vauxhall / Opel Vectra 1.9 cdti 150 SRi with excessive black smoke problem. We test out and review Wynns Stop Smoke treatment for petrol or diesel engines.<br>DO AWAY WITH THESE BULLSHIT UNRELIABLE SWIRL FLAPS. No or little Boost? very low power? smells in Car, smoky Exhaust? all may be caused by these .<br><br>Popular content related to Opel Vectra & Diesel engine.<br>Car has recently had a new DPF fitted, EGR valve replaced. DPF regen (coil) light constantly flashes and smoke comes from exhaust.