Just curious, have you tried taking yours apart and cleaning it out? I used mineral spirits and it made a world of difference.

It gets plugged up with crud from the tank.

There are write ups on it on the forum, but its pretty easy to take apart after loosening the weird nut on the bottom. Just be careful, the wires inside are delicate.

And if you haven't pulled yours out yet, go slow, and be prepared for leaking fuel from the tube.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech