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  1. M

    4.3MPI sputtering at 3500 RPMs why??????

    My 2009 4.3 MPI just started sputtering at 3500 RPMs. I changed the fuel filter and checked the pressure and everything is ok. I tried swapping out the coil, the map sensor, and the crank sensorwith the sister engine and still no luck. It is not giving an alarm so im not sure even if the scan...
  2. M

    2010 4.3MPI low oil pressure and sputtering like crazy.

    My 4.3 MPI has recently started sputtering at about 3300 rpms. Just today i took it for a long run the sputtering cleared up, when i stopped i noticed the oil pressure went down to about 5psi. The alarm went off for low oil pressure and then shut the motor down. I then started it back up and was...
  3. M

    4.3MPI oil leaking from remote oil housing

    I have had to replace the main gasket that goes to the block from my remote oil setup on both of my 4.3mpi's and now one is leaking again. The big orange gasket that goes to the block becomes hard and brital and starts to leak. Has anyone had this problem with these? I guess this is happening...
  4. M

    2009 mercruiser 4.3mpi hard start when warm

    I have a 2009 4.3mpi that i am completely frustrated with. I have replaced the wires, cap and rotor, i swapped coils and ecm's with the twin sister motor, i have replaced the IAC, i have installed the mercruiser booster pumps to rule out vapor locking. I have tried everything and can't seem to...
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