What should my next step be?

Question

I have a 2005 Ford Expedition that was having power issues, wouldn't accelerate, etc. We replaced all of the coil packs as that is what the codes showed to be the problem. After changing those out it seemed to help for a couple of days. Now I am getting the following codes P0191, P0420 and P0430. car still has some power, but you can smell gas when idling and the check engine light is back on. Any suggestions?

Answer 1

Hi there,

Since you have codes for the catalytic converters, I would drop the front exhaust pipes and have a look inside. If they were damaged because of the original misfires, they may be melted and causing the power issue. Either melted or broken up inside. This is where I would start.