Monday, October 24, 2011

Whys my 05 cummins running weird?

My '05 dodge cummins is running rough and lost power jsut after 2nite. we changed the fuel pump to a DPP 150 and put a aero muffler on it b/c my strait 5%26quot; seemed like it needed something more. anyways it was making a louder,higher pitch knocking or not quite knocking hard noice. the engine isnt vibrating other than normal, but there is a definate loss of power. when i punch it i cant even spin the tires...i could for 2 gears before. i have the edge programmer too. but all i put on was the fuel pump and muffler. i reconnected the stock fuel pump and the same thing was happening. i dunno how to bleed the fuel system, or if that would even help it. please help me asap! the best instuctions possible would really help. i dunno where the bleed valve is...please help!!!Whys my 05 cummins running weird?first of all it is a common rail diesel,and it is self bleeding system.the fuel system though needs to be sealed and no air from lines,connections,ect.getting to the injection pump.you really need someone to run tests on the fuel system to see if this is the problem.is the check engine light on?the fuel system is very precise and needs to have the right pressure to the pump and very important from the pump on the return side.if an injector has too much return fuel volume,it will drop the pressure in the whole system causing a no start to having no power.you should take it back to a dealer that has a good diesel tech.that can check things out with a scan tool.it should be covered for 5 years or 100k miles as long as it hasn't been modified,which you did.good luckWhys my 05 cummins running weird?You have air in the line,if you dont know how to bleed it.I have a few diesels and they wont run with air in system.You should grow up and stop spinning wheelsWhys my 05 cummins running weird?It won't run if there is air in the line.May have some bad fuel,try some fuel conditioner.