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  1. alldodge

    Volvo Penta 8.1 PFI missing on 3,5,7 and 8

    Looks are deceiving, might look good but there is a connection in the harness or connector which is not making contact. Swapping is not the issue, need to find out why the coils are not firing. This is why wires need to be ohmed out (ring out). The coils just like the injectors and feeds...
  2. alldodge

    Fuel system selector/shutoff valve

    No, pump the throttle just pumps what is in the carb. If nothing is in the carb, there is nothing to pump If you have mechanical fuel pumps, crank 10 seconds, let sit for 30 seconds and repeat. Do that twice then try a couple pumps and crank Can also drip just a very slight bit of gas down...
  3. alldodge

    Temperature gauge issues? Can't get a temp reading?

    I'm wondering if you bought the water temp switch and not the temp sender. The switch is open until it gets around 200*F then it closes. The temp sender
  4. alldodge

    Frustrated fuel

    Are you asking about the 300 rpm's? If so, for the ECM to turn ON the injectors it first has to see that the distributor is firing. If the Tach doesn't show the rpm's then either the Tach doesn't work or the distributor isn't firing
  5. alldodge

    Temperature gauge issues? Can't get a temp reading?

    Clarification please; when the sender was in the hot water where you measuring using the ohms scale? and did the resistance get less as the temp raised?
  6. alldodge

    Frustrated fuel

    Code 12 just means there are no stored codes When cranking do you see the Tach show at least 300 rpm?
  7. alldodge

    Volvo Penta 8.1 PFI missing on 3,5,7 and 8

    So using noid light on injectors there were no misses? If correct then this is a coil firing issue. I don't have a PFI manual but do have GI and GXI, or was the PFI a slip? Should ring out the wiring back thru connectors to the ECM.
  8. alldodge

    Fuel system selector/shutoff valve

    Yes, and with you running out of gas, it shows you were only running on one
  9. alldodge

    EFI specs for techmate pro

    Agree VP doesn't put to many actual values for a given sensor like Merc and Indmar does. The GXI manual list some fuel pressure values and 5V sensor but not a lot more. They are using mostly GM/Delphi sensors so could use the Merc manual to get some ideas
  10. alldodge

    Volvo Penta 8.1 PFI missing on 3,5,7 and 8

    Do you know if the misfire is caused by fuel injectors or spark plugs? NOID light can be used on injectors to see if they are turning ON/OFF
  11. alldodge

    Stalling, Alarm sounding every 60 seconds

    That is the number one failure of the Merc motors. They fail often and there is no pressure issue. Dang things are expensive for what they are Could test with a mechanical gauge (0-30 psi) Tee'd in same location
  12. alldodge

    Delco EST High Idle

    Something is pulling a lot of current or the breaker is weak. The breaker is 50 amp and the solenoid and motor don't draw that much unless something is shorting out. Might be the breaker but would need a test setup to verify
  13. alldodge

    2000 Mercruiser 7.4 mpi limited to 3900 rpm

    If your motor was newer I would suspect in gear switch but you shouldn't have one
  14. alldodge

    2000 Mercruiser 7.4 mpi limited to 3900 rpm

    It would need to be tested on the water. Doing it on the hard doesn't provide the info needed
  15. alldodge

    Temperature gauge issues? Can't get a temp reading?

    The Merc gasket as 2 brass rivets in it to help make electrical contact between the upper and lower. Take a jumper wire and clamp on side if the sender and ground it elsewhere to see if gauge works
  16. alldodge

    2000 Mercruiser 7.4 mpi limited to 3900 rpm

    Thanks, The scanner showed that the TPS changes as throttle opens and continues to change to 100% for the last 1/4 throttle when nothing changes? Same for the MAP Guess in short, was the scanner on the boat when these things were happening? If it was, then the motor is loosing power like from...
  17. alldodge

    Fuel system selector/shutoff valve

    Assuming there is another filter for the port motor
  18. alldodge

    2000 Mercruiser 7.4 mpi limited to 3900 rpm

    Does the beeper (alarm) work?
  19. alldodge

    7.4L Overheating

    Removing the hose will work, I would have removed the hose coming from the pump to the thermostat housing. Don't know your serial number so the pic below is generic. Your motor should have a power steering and oil coolers. They are both inline with the hose coming from the raw water pump...
  20. alldodge

    Frustrated fuel

    You have a TB distributor but not the module. The module is part of the MEFI-3 ECM The kit you have found should work.
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