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Recent content by vekerik

  1. V

    2010 BF50D Fuel Pump issue

    Thanks for the kind words, jgmo, and for the solid additions! 1. On pumps. Walbro — noted, proven brand. My AliExpress choice was more of an experiment that ended up exposing the root cause. And actually, this very thread is a perfect illustration of it: back on page 1 SaltTime measured 4.77 A...
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    Having problems with my 2012 fuel injected bf50D

    Fair point, and a genuine pump is indeed the cleanest fix — it's in the Notes of my write-up. But the fried-driver case you saw was almost certainly a relay installed without the flyback diode (or wired so the pump current still ran through the ECM). An unprotected relay coil kicks back...
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    Having problems with my 2012 fuel injected bf50D

    Same issue here — aftermarket "universal" pump (16735-ZZ5-003 type from AliExpress) drew too much current and the ECM locked it out right after priming. Solved it with a small add-on relay so the ECM only switches the relay coil instead of the pump. Full write-up with the wiring diagram here...
  4. V

    2010 BF50D Fuel Pump issue

    Same issue here — aftermarket "universal" pump (16735-ZZ5-003 type from AliExpress) drew too much current and the ECM locked it out right after priming. Solved it with a small add-on relay so the ECM only switches the relay coil instead of the pump. Full write-up with the wiring diagram here...
  5. V

    2015 bf50 SFI not getting fuel

    Same issue here — aftermarket "universal" pump (16735-ZZ5-003 type from AliExpress) drew too much current and the ECM locked it out right after priming. Solved it with a small add-on relay so the ECM only switches the relay coil instead of the pump. Full write-up with the wiring diagram here...
  6. V

    BF50D Fuel pump issue

    Same issue here — aftermarket "universal" pump (16735-ZZ5-003 type from AliExpress) drew too much current and the ECM locked it out right after priming. Solved it with a small add-on relay so the ECM only switches the relay coil instead of the pump. Full write-up with the wiring diagram here...
  7. V

    Honda BF50D H/P fuel pump not staying entergized

    SOLVED: Honda BF40D/BF50D EFI — pump primes 2–3 sec, engine starts and dies (aftermarket pump + add-on relay) Symptoms Key ON — the high-pressure fuel pump primes for 2–3 seconds and stops (that part is normal). The engine starts on the primed rail pressure, runs a few seconds, and dies. The...
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