My Friend has a 2001 Dodge 3500 6 speed. The lift pump went out of it and we did find out for about a week. We had to use ether to start it every time. Well I put a new lift pump on it and it seems to have a miss now and we are only getting 10 miles to the gallon. It also idles high. Is there anyway it messed the pump up and is there anyway easy to check the pump.