stalled when stopping

This is my 1st post with a problem. Started and had an uneven idle,going from 600 to 1000 rpm.Drove and had lack of power and service lite came on and when I stopped it stalled. Restarted and headed home and kept wanting to stall at stops. Driving and the EML,brake and triangle lite came on. Pulled into a lot and stalled. Checked brake fluid and vac hose to booster and seemed ok. Restarted and only service lite was on so drove home and parked. Scan tool shows codes P0171 and P0174 on and P0300,1344,1343 and 1347 logged but off. Had P0171 and 0174 last year and found intake boot ripped and replaced same and all was well till now. Any help would be great, thanks. I don't have an owners manual and don't know what the EML and the triangle mean.