: Decel Stall

05-24-08, 06:37 PM
I had a decel stall problem at 900-1000 rpm on my 99 SLS with 75k miles. On advice for eldorado1(big thanks to him), I cleaned the egr valve and this fixed the problem(no stall in 2 months since fix). There were hard thin deposits around the valve seating area, i.e., what the pintle seats against. This was causing the valve to stick shut. Can anyone explain why the egr valve sticking shut would cause the decel stall problem?