Hello Saab friends, I have a problem with my Saab Bj.99 2.2 TD. I drove quite fast the other day on the highway, and about 180 there was a small bang and the power had fallen by 50%, as well as significant black clouds in the re-gas gave behind me the sight impaired. Now my neighbor told me that possibly the air quantity meter could be defect, said exchanged, now the black clouds are almost gone but the performance is still bad. At the cold start it goes c a 2 min normal but then the moto lamp lights up. Is it possibly the diesel filter? And how can I change it, or what does it cost in the workshop. I am grateful about every advice.