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JimN
JimN
MC Master Poster
Last Activity: 06-30-2022, 07:36 AM
Joined: 07-20-2004
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  • JimN
    replied to Fuel Pump 101
    Fuel pump is supposed to be on its own power, not sharing the ignition/gauge power (assuming it doesn't have the MDC box)....
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  • JimN
    replied to Fuel Pump 101
    The ECM DOES control when and if the fuel pump relay closes- if the ECM sees no RPM info, that engine won't run. The coil is only part of the ignition system and the Ignition Control module is where the ECM is able to have some control/input from the ECM.

    Your problem was in the safety...
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  • JimN
    replied to Fuel Pump 101
    I wasn't referring to the battery's ground cable, I was referring to the other thin ground wires- there should be several.

    You can use a test light for checking the relay's output- again, test AT the fuel pump relay first- the relays are located near the ECM and you can trip it manually...
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  • JimN
    replied to Fuel Pump 101
    If i has a distributor, it has the Ignition Control module inside and it's possible that the star wheel is full of metal shavings, the coil may have gone to meet its maker or the distributor's ground may not be making good contact with the block.

    How do you connect the battery cables-...
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  • JimN
    replied to Fuel Pump 101
    We spent three full days on 'Cranks but won't fire' scenarios that were created by the staff of the place where we went for training- if you don't have a manual, get one and read it before you attempt to find the problem. If you don't know what to look for, the output & return voltages needed, it's...
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  • JimN
    replied to Fuel Pump 101
    Make sure the terminals in the plug that's connected to the pump are clean and snug. If the pump has been replaced, the new one should have come with a pigtail because excessive heat in the terminals causes them to lose their grip.

    I have seen an aftermarket repair kit for this that has...
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  • JimN
    replied to Fuel Pump 101
    Unfortunately, it would be almost impossible to make a tank that has enough baffles to prevent sloshing AND seal tight/not be two pieces that need to be attached and therefore, more likely to leak- that kind of plastic isn't the easiest to bond together, AFAIK. The other part of this is: It needs to...
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  • JimN
    replied to Fuel Pump 101
    I'm sure you have heard and read it, but the best way to not need to replace a pump is to never run it dry or go below 1/4 tank. If the boat is driven in a way that causes the gas to slosh, I wouldn't go below 1/2 tank....
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  • JimN
    replied to Fuel Pump 101
    Is the pump not working? If that's the case, I would remove it and look for a part number on the pump itself, then look online or at a local auto parts store. Unfortunately, there aren't any easy answers to this and since the Coast Guard has strict regulations for fuel delivery, the car and marine pumps...
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