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    #16
    yes there is a difference.

    the fuel transfer pump is a low pressure in tank pump. underneath the rear seat.

    the fuel pump is a high pressure external pump. right in front of the drivers side rear tire.
    AWD > RWD

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      #17
      Alright thanks for clearing that up. Bentley manual only said that early cars had pump under the car and later builds had it under the rear seat. Bentley is usually really detailed but it was vague in this category. Neither pump buzzes at all though. My multimeter's screen went out so I need to buy a new one before I can test everything. However in the meantime I might try to switch back to my stock chip with 87 gasoline.
      West German BMWs, they just don't make the same as they did before the wall fell.
      ^Case in point: Auto-Repair Technology. Everytime my car isn't starting or acting up I let it sit, sometimes for an hour, sometimes for days. But it eventually fixes itself.

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        #18
        swapped the fuel transfer pump. Car ran ok at first but went back to shit the next day. I think the transfer pump I swapped is worse because now there is a buzzing sound. Maybe the main fuel pump? I think I'll just have the mechanic look at it. He doesn't care to just tell me what is wrong and lett me fix it myself.
        West German BMWs, they just don't make the same as they did before the wall fell.
        ^Case in point: Auto-Repair Technology. Everytime my car isn't starting or acting up I let it sit, sometimes for an hour, sometimes for days. But it eventually fixes itself.

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          #19
          PROBLEM SOLVED (I think) it just took about 7 inches of new fuel line.

          Checked the fuel lines and noticed that the line going into the fuel rail was cracked and frayed around the hose clamp. This is after some shitty mechanic told me my newly rebuilt injectors were bad and that he had to "spend some time getting them to work properly". Not sure what that line looked like before he touched it but it definitely should not have been put back on in that condition. I replaced the cracked lines and car has not had the problem for a week.

          So I'm guessing that the hesitation was being caused by fuel squirting out onto the hot manifold and valve cover and not into the fuel rail. Wonder it didn't catch fire...
          West German BMWs, they just don't make the same as they did before the wall fell.
          ^Case in point: Auto-Repair Technology. Everytime my car isn't starting or acting up I let it sit, sometimes for an hour, sometimes for days. But it eventually fixes itself.

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