I recently had my exhaust manifold replaced. While I had driven my van patiently waiting for my mechanic to free up a bay I'm told the computer adjusted the fuel mixture to compensate for the lack of pressure. Well 2 weeks into the new exhaust manifold and I'm still getting 12 mpg around town. Will the computer need to be reset or could something else be wrong?

 

WOW. That had to be loud. You dont say what yearr or engine or anyting else, so Im not sure how anyone can help you.

 

welcome to df... what year van?