Have Boat Questions? Ask a Boat Repair Expert.
Hello, my name is***** will assist you.
I have a few questions back for you.
Has any work been done to the fuel system?
Is there a primer bulb in the fuel line?
What is the fuel pressure going to the rail?
Are the coil original or have they been replaced?
What was the ignition fault that the gauge was showing?
Which pump was replaced, or was the entire FSM replaced?
There were a few bulletins on this engine when it came out. Check the ground bolt for the engine. Make sure that the rung terminals are not cutting into the harness that is running under it. Also look at there the wires for the CPS gone from the harness going to the sensor. They have been known to chafe there as well. Let me know what you see.
Yes that is the one. On the CPS, it is not the sensor end of the plug, it is the harness side right around the starter
Your welcome. Talk to you then.
Look at the rear ground post. There is one of the rings that is poking into the harness loom. Make sure that it is not cutting into a wire.
Would be more of a cut into the wire.
Have you looked at the ground bard located behind the ECU. There are a few of them there.
board or multipin grounds. You will see them begind the ECU. Many wires going into a long flat bar. The cap comes off to look at the bars between them.
In the book, yes I think so.
Did you do a cranking spark test or on the CDS?
Try a cranking spark test on the coils.
When did the engine run last? And what did it do right before it shut off?
Is there a primer bulb in the fuel line from the boat to the engine?
Ok, I know that you have replaced the FSM, but have you tested the fuel pressure to the fuel rail?
Have you tried a niod light in the upper three injectors to see if the signal is getting there?
I am assuming that you have already looked at the easy stuff like the fuses
You plug it into the plug in for the injector, then crank the engine over and see of the light will flash or not.
Have you swapped the three working with the three not working?
And still not working?
Alright, when you tested the voltage going to the injectors, was that at key up or cranking? Where was the ground lead of the meter for that test?
What about the meter leads?
I mean where were they connected to the harness when you did the test.
Can you have a helper crank the engine while you test the upper 3 injectors electrically? Like you did for key up. This is really sounding like an issue in the harness.
the PCM controls the ground side of the injector to fire it. Follow the diagram from the ground on the injector to the PCM, check all of the break points in the harness. There has to be a bad wire there. You can test resistance from each injector to the PCM plugs using the diagram to tell you which pin in the plug you need to be on.
Does the engine even try to fire at all? It should run on 3 cylinders.
Have you looked to make sure that the throttle body is not loose on the superhcarger?
I am wondering is that is secondary to the engine not starting. Since you have already tested the harness, and swapped the PCM, there has to be a different cause.
Yet, since you have tested the voltage going to them when cranking and it is good, the problem lies elsewhere.
Great. Let me know.
Talk to you then.
No worries. There are no time limits here.