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M20B27 SETA Warm Start

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    #16
    So now I'm reading that the E30 fuel pump does not prime the system like most newer cars do, but the fuel pump only runs when the crank is turning? Can someone confirm this?

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      #17
      The next step will be pulling the injectors and seeing if any of them are leaking. I'll try to do that tomorrow or thursday.

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        #18
        After checking a few things, I found that the spark seemed a bit weak so I installed a new distributor rotor, ignition coil, spark plugs, fuel filter and a check valve on the fuel line to make sure fuel wasn't flowing back to the tank. I think the fuel pump might be a getting weak as well but it still puts a lot of pressure into the lines.

        Still having the same problem with it not starting after getting warmed up. What else could I be missing or overlooked? Would the O2 sensor be giving it problems?

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          #19
          So I thought maybe I was having issues with fuel flow/pressure so here's another list of parts thrown at the car to remedy the situation-

          Fuel pump assembly
          New fuel filter
          M50 injectors (seems to run better with these injectors)
          Bosch coolant temp sensor (I've read people having problems with other brands so I went OEM)

          Starts cold on the first crank and runs great. Still won't start after warming up. One other thing I checked last night was the crank angle sensor. The wires at the sensor ed are frayed and it gives erratic readings with a multi-meter so I have another one on order today. If that is the problem, I don't understand why it would start cold but not warm without a crank sensor?

          Anyone else have ideas?

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            #20
            Any progress?

            Hi there, noticed you're having the same issue as me and have gone to substantial lengths to fix it. You kind of left us hanging about the result haha, does that mean you found the issue?

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