Originally Posted by 2kg4u
I assume it is now throwing a P300 code. On a random misfire, I would start by checking fuel pressure. When was the last time you changed the fuel filter? How about the fuel pump?
You would be correct on the code.
Fuel filter not since she'* had it (3 years)
Fuel pump- We haven't, so I'd assume 135,000 miles ago when it was installed at factory
I guess and fuel pressure check is in order....