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+--- Thread: Engine problem (/showthread.php?tid=1943)
Engine problem - stumpjumper - 07-23-2017
Engine losing power throwing codes 4334 and derating any ideas cummins replace the Def pump went 150 miles did it again.
RE: Engine problem - marek4792 - 07-23-2017
Is your harness in good shape? I noticed when something goes wrong with the DEF system most of the time it is electrical, but having a repeated pump failure sounds like there could be a blockage burning up the pump. Rawze posted pictures of one truck he looked at with similar complaints (and the truck owner having spent a large amount of money with no luck) that had the DEF crystallize almost blocking the pipe where the DEF injector was.
RE: Engine problem - Rawze - 07-24-2017
(07-23-2017 )marek4792 Wrote: Is your harness in good shape? I noticed when something goes wrong with the DEF system most of the time it is electrical, but having a repeated pump failure sounds like there could be a blockage burning up the pump. Rawze posted pictures of one truck he looked at with similar complaints (and the truck owner having spent a large amount of money with no luck) that had the DEF crystallize almost blocking the pipe where the DEF injector was.
that was this post...
http://rawze.com/forums/showthread.php?tid=283&pid=1807#pid1807