Announcement

Collapse
No announcement yet.

Fuel Pump Replacement on 1995 5.7 TBI

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    Originally posted by 88 PS190 View Post
    Sometimes the only solution is to figure out a real fuel pressure data logging solution. Not super cheap but useful.

    Many generations of MEFI will allow you to disconnect a sensor and when disconnected fully the system will run off a "default" value so if a sensor is supposed to be reading say 1 to 5 volts - the unplugged value that is inserted might be say 3 volts. And that should be sufficient to provide a "normal" run condition or atleast faily normal.
    Interesting, I'll have to give it a shot. Any idea where I can find a diagram for these sensors (or perhaps a TeamTalk post)? Or should I order a service manual?
    Tim
    2021 Lone Star MasterBash
    Ohio State Engineering - Go Bucks
    1998 MC MariStar 225VRS
    1995 MC ProStar 205
    ISO MC 205V/XStar/X2/X1

    Comment


    • #17
      There are only a few, engine coolant, idle air flow etc.

      Comment


      • #18
        Originally posted by tmothy07 View Post
        Think I need to have someone professionally check the injectors on this TBI 5.7?
        I think it's worth doing and is really inexpensive. I don't think running cleaner through the tank is anything but a waste of money (imo) only takes a few minutes to pull them and send them out for cleaning and testing

        Comment


        • #19
          This is the MEFI 1.2 diag which I've been using on my 94. You might test the coil and the pick up.

          MEFI 1-2 diagnostics
          Last edited by CantRepeat; 06-02-2022, 04:23 PM. Reason: added the mefi file link
          -Tim

          Making boomers great again!! Boomin'

          Comment


          • #20
            Thanks for that source Tim. I've got my replacement TPS, so hopefully that works to solve this issue.
            Last edited by tmothy07; 06-08-2022, 06:51 PM.
            Tim
            2021 Lone Star MasterBash
            Ohio State Engineering - Go Bucks
            1998 MC MariStar 225VRS
            1995 MC ProStar 205
            ISO MC 205V/XStar/X2/X1

            Comment


            • #21
              Update: that didn't solve the issue and I threw in the towel. I let Ace Marine know everything that I had done to it so far with no change in behavior and they dug into it. Turns out, it was a clogged valve/fuel line issue in the in-tank pickup. The material was what confused all of us, it looked almost like a gray concrete-y mud, and had hardened inside of the old hose and filter. It was evidentally causing a partial blockage sometimes (which accounted for the inconsistency of the issue). Any way, a new anti-siphon valve to replace the original, and a new hose/filter, and a nice clean fuel tank has the boat running like it's brand new. I suppose I don't have to worry about any fuel system part replacements for a while lol.
              Tim
              2021 Lone Star MasterBash
              Ohio State Engineering - Go Bucks
              1998 MC MariStar 225VRS
              1995 MC ProStar 205
              ISO MC 205V/XStar/X2/X1

              Comment

              Working...
              X