Announcement

Collapse
No announcement yet.

fuel pump relay not getting power

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

  • StingrayDad
    replied
    Fuel pump relay should be triggered by a ground through ecm. Terminals 30 and 86 should be powered with key on.(this is on relay terminals) Terminal 85 should go to ecm and when triggered the ecm grounds that terminal to turn on fuel pump relay. Terminal 87 should go to fuel pump. It gets power from terminal 30 when relay is triggered.


    Sent from my iPhone using Tapatalk

    Leave a comment:


  • skydyvyr
    replied
    Um, have you verified the safety switch? Make sure the lanyard is on? I’m not sure if on your model it interrupts both fuel and spark or not, but that is always the first place I look after working electrical on my engine.

    Yes, wiring diagrams are not available for these boats, so no easy solution there.

    When chasing down gremlins I get my fluke meter out, disconnect connectors and start doing continuity checks... not particularly fun, or quick, but it is the only way I know to try to figure out what is connected to what if I can’t get the knowledge for more experienced people here on the board.

    —Sky

    Leave a comment:


  • Ts87
    started a topic fuel pump relay not getting power

    fuel pump relay not getting power

    My names is Tim and I have a 2001 Mastercraft X-Star with an Indmar LTR 330hp engine.* I just purchased the boat and it ran fine on the test drive.* I brought it back home*and it pulled 3 wakeboarders fine, then on the 4th the engine started to stutter.* We packed it up for the day and went back out to the lake 2 days later and it had the same issues almost immediately.* The 50 amp circuit on the engine kept tripping, if i reset it engine would start up and run again.* The stutter will vary, sometimes right after hitting the throttle, sometimes it would run for 90-120 seconds and then bog down.* Then we decided to float and my wife left the stereo on and it drained the battery.* Got a tow back to the dock and brought the boat home.* That night I opened the fuel tank and the gas smelt bad.* I drained the gas tank, charged the battery and cleaned the air filter.* Went out to the lake the following*day and the boat wouldn't start.* Went home*and started to test things.* The fuel pump was not getting power, check all 3, 15amp fuses and the fuel pump fuse was blown.* I opened my fuel tank and pulled the pump unit to find that the negative terminal had come off pump, at this point I thought the pump might be bad so I bought a new one.* Tested both fuel pumps directly to battery and they both work.* Put the new fuel pump in since I don't know how long the old one had been in there and since I had already bought a new one.* Replaced the fuse for the fuel pump also.* Pulled both the ECM and Fuel Pump Relays and they are both functioning.* Reinstalled everything in the boat and turned the ignition to on, no fuel pump prime.* Took off the ECM relay and verified it is getting power with voltmeter, it is.* Reinstalled ECM relay and pulled the Fuel Pump Relay, it is not receiving power.* Having trouble finding the wiring diagram for this boat.**

    But my question is, does the fuel pump relay get power from the ecm?* Does this sound like I have an ECM problem or could it be something else?* I just want to make sure I check everything before sending the ECM in to have it diagnosed.* Engine still tries to crank over but not starting due to lack of fuel.* Ran a fuel pressure gauge and getting 0 psi due to the fuel pump not getting power.* Sprayed some starting fluid on the air filter and it will start briefly from the starting fluid and then die from lack of fuel.

    Thanks for your help
Working...
X