I have a 2000 Pontiac firebird vase model it’s got the v6 3.8l and I can’t seem to get over 3000 rpms. It just started a week ago and I was wondering what could cause this. I have codes on that I will list below. I’ve changed two of the three coil packs and all spark plugs I’m going to get a new coil pack for the last one because they just got them back in stock. Any further info would be much appreciated
P0151
P0300
P0405
P0756
P0101
P0141
P0151
P0300
P0405
P0756
P0101
P0141