I recently replaced the throttle body for my 95' S420. When that was done, I used compressed air to blow out the injection rail and injectors to free them of dirt. All injectors click and open. I also removed the fuel pump assembly and replaced the fuel filter as well as cleaned out the fuel pumps by running them through with clean gas. The car still idles a little rough and stalls out at lights. Does anyone know what else could cause the problem?[]

Thanks.

SS