Air filter
My isl 425 in my Newmar is not getting enough air, the air gauge back nx to engine almost closes up after driving 100 miles with a new air filter in it an I'm just getting 6.2 mpg I'm thinking about d...
Forum Discussion
You can check the accuracy of your filter minder with 6' of plastic tubing with some water in it...X inches of water to make it trip.
