| Fuel Flow Problems
Took 406 out today for first real workout in years. Ran great at first, and then as the hours progressed it started running rough at progressively lower rpms (2600, 2400, 2000 etc). Figured I sediment was getting stirred up (was operating off-road) and clogging the filters so decided to change filters. Sediment bowl filter had some paint flakes, otherwise everything looked fine, but still changed sediment filter and two fuel filters with OEM issue (MB 411 477 00 15 sediment, MB 000 090 11 51 fuel filters). Ran worse than before. Chugged at low rpms (between 400 and 800) and then died. So......
Emptied the fuel tank and put in new diesel. Detached all the lines and blew them out (didn't mess lines into engine). Pulled suction pipe from tank and discovered paint flakes had been coming off it so I cleaned it. Still chugged. Changed OEM fuel filters for NAPA 3167. Still chugged at low rpms. Removed fuel filters, ran rough at first and them perfect. Reinstalled OEM fuel filters, ran like s*H*i*T again. Removed filters and now it is running fine.
Anyone have any insight of guidance? Obviously I need the filters, but why won't engine run with them? |