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    e30 M10 engine cuts out

    After changing the head gasket on my '85 318i, its runs sweet at idle and light throttle but under load it cuts out at about 3000 rpm. The revs then drop until it gets to around 1200 rpm then kicks away again. Will run non stop under light throttle.

    Had injectors cleaned while out, changed fuel filter. Looked at the in-tank unit but it appears to be only a float/sender - i can't see a pump module in there.

    I don't have a fuel injection tester so may just swap out the external pump/fpr to see what happens.

    Am i right going down the fuel pressure route? any suggestions?

    Car has new water pump, air filter, cap, rotor, etc. This fault did not exist before the HG change so maybe it did something........

    #2
    May be a long shot but the ICV could do that. The ICV on these motors are SHIT. Just delete it.

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      #3
      ICV is only involved at...well....idle :-)

      Check for intake leaks
      Deck Lid and soft top Shocks on hand

      Seat shocks on hand for immediate shipment
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        #4
        I understand that the ICV controls the idle but when he said it dropped in RPM and then jumped up that is a symptom of a bad ICV. Mine did that all the time. Also may want to check the TPS and like he said intake leaks.

        Comment


          #5
          Originally posted by Bimmerguy91 View Post
          May be a long shot but the ICV could do that. The ICV on these motors are SHIT. Just delete it.
          wat
          '84 318i M10B18 | 93whp/90ftlbs | 147- Safari Beige | MS2E w/ LC, 2-Step

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            #6
            ...found a split in the vacuum line that goes from Distrib to throttle body. Fixed it but now battery is dead. Test drive and update later.

            Comment


              #7
              Originally posted by Jaxx_ View Post
              wat
              yes. they are pieces of shit. even a working one doesnt usually work right. You can bypass and adjust your idle with the adjustment screw on the throttle body.....

              Comment


                #8
                Originally posted by Bimmerguy91 View Post
                yes. they are pieces of shit. even a working one doesnt usually work right. You can bypass and adjust your idle with the adjustment screw on the throttle body.....
                That's not what I was questioning. cutting out would not be caused from the ICV. There's no need to delete the ICV if the car is idling fine.

                as well, L-Jet uses a WOT switch TPS, and I'd have hard time thinking that that would be the issue.

                None the less, if you want to send people on wild goose chases, that's the way to do it.
                '84 318i M10B18 | 93whp/90ftlbs | 147- Safari Beige | MS2E w/ LC, 2-Step

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                  #9
                  Im just speaking from experience. My m10 did weird shit like that before I got rid of my ICV.

                  As far as the WOT switch TPS I did not know that.

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                    #10
                    Try cleaning your afm. Possible vac leaks.

                    NEW ERA AUTO GLASS - SFV SOCAL - 818 974-3673
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                      #11
                      Also possible cracks in the intake boot

                      NEW ERA AUTO GLASS - SFV SOCAL - 818 974-3673
                      DREWLIENTE

                      1$ PShops PM me

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                        #12
                        Try cleaning your afm. Possible vac leaks.

                        Have cleaned AFM and flap is moving freely

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                          #13
                          I like how nobody mentions a bad CTS as it can cause a rich condition in which it will hardly idle, and if it idles ok, then it will bog it down as it's adding too much fuel in the higher RPM's

                          But on a second note, fix all intake leaks first.
                          85' 318i ~The Bronze Bomber (FrankenM10 with a Forced Future :wgaf:)

                          Comment


                            #14
                            Cts?

                            Comment


                              #15
                              Originally posted by 3bimmersover25 View Post
                              Cts?
                              I think he means coolant temp sensor.

                              ... I'm kinda "eh" on that idea. but they're so cheap there's nothing wrong with replacing it.
                              '84 318i M10B18 | 93whp/90ftlbs | 147- Safari Beige | MS2E w/ LC, 2-Step

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