kohrs58

I just bought a 2004 mustang gt with a 4.6 it has 90,000 miles on it. It just started having a miss in it. I replaced the spark plugs and checked all th coli packs with my multi meter, and they all read the same I cleared the codes and went for a ride. it runs better but at high rpms it still misses and the check engine light comes on. I still get the same code p301 any thoughts.

99GTvert

You said the multi meter read all the coil packs as the same but were they all in an acceptable rating? Because I was thinking if it wasn't your plugs then it would be your coil packs.

JimC

Moved from the 2005+ 4.6 for you - watch what sub section you are in when you post. You should find better response here.