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I have 2003 200HP OX66 VMAX EFI VX200TLRB that is stalling and won't start for a while.
It starts at the ramp every time. Idles out of the marina and will run at speed. After I stop for a while, it will usually restart then shut off after a minute or two, still at an idle. At this point it usually won't start. The starter engages it just won't fire. It can take anywhere from 5 to 45+ before it will fire again. To confuse matters, it will sometimes shut down at speed. When it does this it refires immediately sometimes not.
I tested the red and blue wires on the VST when it is running fine12-13v on the Red.
Less than .5 for 3 seconds then 12v. Once the engine fires I get a constant .26 at idle, .3+ at higher RPMs.
*As of yet I have not been able to get readings at failure yet. I will try again this Sat.
I tested the HP Fuel Pump resistor. It seemed to be in spec. I did get minor fluctuation but that could be rounding, meter, or how well I held the leads. I am going to find an analog tester and retest.
1. I cleaned and checked the VST tank and filter
2. Changed the filter on external canister
3. I have replaced the low pressure fuel pumps
4. Cleaned the 02 sensor
5. I tested fuel pressure above the VST and it is a steady 35 pounds
6. Don't remember if I changed spark plugs or not. But I think I have, anyway I will have someone more knowledgeable than me take a look at them
Besides testing the red and blue wires at failure, what other things can I do look for Saturday? Could it be the kill switch or ignition switch cutting out? Spark plugs, main relay, etc?
Thanks in advance.
It starts at the ramp every time. Idles out of the marina and will run at speed. After I stop for a while, it will usually restart then shut off after a minute or two, still at an idle. At this point it usually won't start. The starter engages it just won't fire. It can take anywhere from 5 to 45+ before it will fire again. To confuse matters, it will sometimes shut down at speed. When it does this it refires immediately sometimes not.
I tested the red and blue wires on the VST when it is running fine12-13v on the Red.
Less than .5 for 3 seconds then 12v. Once the engine fires I get a constant .26 at idle, .3+ at higher RPMs.
*As of yet I have not been able to get readings at failure yet. I will try again this Sat.
I tested the HP Fuel Pump resistor. It seemed to be in spec. I did get minor fluctuation but that could be rounding, meter, or how well I held the leads. I am going to find an analog tester and retest.
1. I cleaned and checked the VST tank and filter
2. Changed the filter on external canister
3. I have replaced the low pressure fuel pumps
4. Cleaned the 02 sensor
5. I tested fuel pressure above the VST and it is a steady 35 pounds
6. Don't remember if I changed spark plugs or not. But I think I have, anyway I will have someone more knowledgeable than me take a look at them
Besides testing the red and blue wires at failure, what other things can I do look for Saturday? Could it be the kill switch or ignition switch cutting out? Spark plugs, main relay, etc?
Thanks in advance.