When I start my car in the morning, it idles pretty rough. The dash rattles, the steering wheel rattles. I replaced the glow plugs and it helped quite a bit, but its still noticeable. I turned up the idle screw to tone it down a bit and kept it low enough so the idle is not screaming when warmed up. Any ideas?? I'm thinking it may be injectors but I'm not sure. The IP is set to spec, new fuel filter, new glow plugs, rebuilt IP.