Recent content by muc

  1. M

    Twin Merc 250 fuel burn difference's

    This can be a tough one to get a dealer to spend the needed time on. This needs to be diagnosed while out on the water under load. Need to hook up 2 matched fuel pressure gauges and watch them. Need a tech who has the knowledge and be allowed to spend the time to interpret the G3. Something to...
  2. M

    Warning horn not getting ground

    Hi @Jeanric Is this something you're still working on? If so I might be able to help. The Ford ECA (what you are calling ECU) doesn't work the way you think. What symptom caused you to look at this S.L.O.W. system?
  3. M

    Twin Merc 250 fuel burn difference's

    Hi, been away. I can't really tell much from the vid. A scan tool might say more. It's been a decade since I was last in the boat business, but back then Merc wouldn't do anything for differences below 5% and it was like pulling teeth to get them to do anything below 10%. I don't know if that's...
  4. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    How many of these .rec files are under no load?
  5. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    I don't think shutting down an injector would give much useful info. I wouldn't know what to look for. But if you want to try I don't think it would cause problems and might be useful. It's very unlikely the flexible fuel line is collapsing, but possible and would explain your issue. I don't...
  6. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    @Lpgc thank you for taking an interest in this issue, more eyes looking at a problem always help. You can look at the files if you want. Just go to rinda.com and click on the updates tab. Click the button next to Diacom and then click the download button. This will let you install Diacom...
  7. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    I can only see two inputs to the ECM that act weird. MAP and fuel pressure. It was a toss up as which I would recommend first. My call was the MAP, because of the "gold rule" when a tech is guessing --- Pick the cheapest and easiest first. I think it's now time to replace the fuel pressure...
  8. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Based on what I see in these files. I can see two inputs and one output go crazy. The inputs are fuel pressure and MAP. The output is injector pulse width. The fuel pressure drops at the same time manifold pressure increases. Both of them happen at the same time. The injector pulse width seems...
  9. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    I don't know how to convert these into .rec filed. Can anyone help me?
  10. M

    Need help: Bizarre Bravo III freshwater galvanic corrosion quandry

    Back in the early 2000s the dealer I worked for had a rash of these problems --- well only 8 but it seemed like a lot at the time --- so I had to learn. The first and best resource I found was from Mercury Marine, a 80 page manual part number 90-8M0167072 and it's cheap $20.00. It does a great...
  11. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Earlier I saw a bit of discussion about TCP TSP actual and commanded. Because trouble shooting odd issues like this usually requires understanding how and why the ECM makes the decisions it does, here is a little explanation. ETC = electronic throttle control, "fly by wire" The Speed Based...
  12. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    DTC 0087 Data valid but pressure below 20 PSI (1.37 BAR) for more than 3 seconds Why Volvo picked below 20 PSI to set this code I have no idea. I doubt 20 PSI is even enough to idle this engine. But that's what they chose so unless the ECM sees below 20 PSI for more than 3 seconds ---- no code...
  13. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    I don't agree. Could be a ECM driver output. Could even be something fuel related. I have seen a rubber fuel line that had a little flap of rubber come loose inside. At low fuel flow rates, everything was fine. But once the flow increased enough that flap would move and restrict the flow enough...
  14. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    I don't see any .rec files. Your battery had a resting voltage of 12.1v this indicates a battery with about 50% charge. Cranking dropped that to 9.4v. 9.6v is considered bare minimum. I don't know if the battery you have now is causing or contributing to your current problems, but it can't be...
  15. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Only way I can think of is to monitor the PWM with a scope. Guessing it just goes back to HPFP inlet. If it leaks past the pump piston. I think this is unlikely. Yes you would smell it. Not at the dipstick unless you first blow down the tube to clear the oil that just sits there, open the oil...
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