Yamaha Dual fuel flow management harness

[sergio389]

Hi guys,
New to this forum, but have learned and gotten alot of useful info from previous threads/post.
PROBLEM........
2001 yamaha(twin) 200 HPDI's running GREAT.....
Dual fuel flow not working. Display reads all 0's but it was working fine till 6 mos ago.
Where do I begin trouble shooting? Should I clean sensor(s) by the fuel/water separator first, and what am I looking for?
Got a gut feeling it's in the bilge area where moisture and humidity live......
Thanks,
Sergio389:

[Hollywoodfish]

I had the same issue.
Check your connections for corrosion. Make sure that you check your ground at the gauge and also at the fuel flow sensor. Good Luck