Nate,
Your pop tester sounds like a bad copy of the one at Mercedes source: $189.50
https://mercedessource.com/store/diesel-fuel-injector-balance-pressure-tester-yes-you-can-do-it-yourself
I'll pick one up sometime.
Rob
Garden Grove, CA
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On 10/26/13, 3:10 AM, diesel_mercedes@yahoogroups.com wrote:
Diesel Injector Testing Posted by: vwnate1@yahoo.com vwnate1 Date: Fri Oct 25, 2013 6:55 am ((PDT)) Hosed again ~ I bought a home made Diesel Injector Pop Tester from a guy in Ohio , he converts those inexpensive hydraulic jacks to Pop Testers but this one was *so* poorly assembled the large diameter pipe you're supposed to screw in as a Diesel Fuel Resivoir , couldn't be screwed in because he'd welded the output pipes over the threaded hole . Plus , he installed a broken pressure gauge , this wasn't any accident .he clearn just didn't care . I persevered and ever so slowly & carefully dribbled in some fresh Diesel Fuel , then pumped it , dribbled in some more , pumped it again and so on until it had sufficient fuel to pump up the injector ~ no matter how fast I pumped it , it wouldn't create enough pressure to pop the injector and it leaked internally allowing the pressure to go down *instantly* as soon as you raised the pump handle for the next stroke . $125 flushed , what a jerk . Now I need to rustle up some spare injectors and take them to my local Service Place where they'll usually Pop Test them for free if I get there at the right time and ask politely . I always go in with a bunch and only keep enough to do my engine , then I give them the rest as a " thank you " for not charging me , I know they're always in need of cores for rebuilding . The slight missing and resultant lack of power under load or upon full throttle is back , this morning as I was zipping up the Harbor Freeway @ 0-Dark:30 going 75 MPH , I reached a slight rise (NB @ Adams) and the car slowed all the way down to 62 MPH Maximum ~ I can *just* feel the cylinders loosing power and slightly missing like maybe an air intake leak in the fuel system ~ the last time I had this , it was my other Diesel Coupe and the hand primer pump was leaking Diesel ever so slightly ~ I see / smell no leaks this time but I also see it's the original hand primer so I'll go buy a new one and install it , see what happens . After I transitioned from the 110 to the I-210 , I ran it up as fast as it'd go then I feathered the throttle until the engine was glassine smooth agin and held it there , after a bit it slowly began to accelerate until it reached 85 MPH and my exit (Baldwin Av.) came up . This indicates lean running in spite of all the Diesel smoot on the Cove and the off idle smoke I see in my rear view . I bet I have multiple issues going on here . Stand by for more technical babble and gnashing of teeth . -Nate
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