No power to fuel pump

I have a 2006 XLV with the 5.7 Indmar EFI. I pulled the boat out of winter storage and it was running flawlessly for a couple weeks. The other night on the lake, I went to start up to go home and it started pretty hard. I had to pump the throttle quite a bit which I have never had to do in the 15 years I've had the boat. Thinking it was just the fuel/water separator that caused the hard-start, I changed out the cannister the next day only to find the boat would crank but not fire at all. I brought the multimeter down and discovered I am not getting power to the fuel pump. I started running down the list of possibilities and this is what I've done so far:

Checked fuses near the ECM- all good.
Removed all three relays and tested with multimeter- all good
Checked kill-switch connections and tested continuity with multimeter- good
Removed oil pressure sender and tested with multimeter- good
Checked for loose/corroded connections under dash- all seem fine

Most posts I have read on similar issues pertain to carb engines so I am at a loss for what to check next. Any help is appreciated.

So are you testing for voltage while cranking or just the 2 seconds it comes on when you turn the key on?
The crank sensor could cause this problem and worth looking into as well


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I'm checking it while cranking. I will take a look at the crank sensor. Do you know where it is located? I can't seem to find it on any diagrams.

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Originally Posted by Probably the Killswitch

I'm checking it while cranking. I will take a look at the crank sensor. Do you know where it is located? I can't seem to find it on any diagrams.

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Under the water pump, just left of the harmonic balancer when looking at the belt drive. Probably a $30 part and a PITA to change.

You can check the resistance on the sensor. I believe you want to be under a 1000 ohms. Last one I checked new was 300-ish and the old one measured 6,000 (trash).

Thanks for the tips guys, I really appreciate the help. I'll give it a go after work and let you know how she does.

If you turn the key to run you should see 12V at the pump for 1-2 secs and/or even hear it build pressure. If the crank position sensor or oil level switch is bad, then it won't fire when you try to start the engine.

If there is not voltage at the fuel pump at all, then time to start looking at wiring back to the ECM and the ECM itself.

How did it run home once you pumped it to start? Crank position failing usually causes misfires and no power.

I'm getting no power to the pump whatsoever. I'll try to pull all the wires out of the conduit first to have a look at them. I'm hesitant to jump straight to the fried-ECM conclusion just yet but I'm stating to get to a point where it's not unreasonable.

Boat ran fine on the way home. Cruised at about 3K rpm for 10-15 minutes then came down to an idle without issue to dock. No spit/sputter or rpm weirdness.

Quote:

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Originally Posted by Probably the Killswitch

I'm getting no power to the pump whatsoever. I'll try to pull all the wires out of the conduit first to have a look at them. I'm hesitant to jump straight to the fried-ECM conclusion just yet but I'm stating to get to a point where it's not unreasonable.

Boat ran fine on the way home. Cruised at about 3K rpm for 10-15 minutes then came down to an idle without issue to dock. No spit/sputter or rpm weirdness.

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Considering it was hard to start, ran fire back home, now won't start, doesn't make me think ECM either, but cannot rule it out yet.
I'm more likely thinking part of the start lock-out circuit that allows the pump and injectors to power up. Most EFI systems lock-out on crank position, oil level, and coolant temp. Those are the 3 sensors I would go after first.

Coolant temp sensor fails high
Oil Level sensor fails low
Crank position just fails and doesn't give feedback.

When you say you are getting no power to the fuel pump... Are you actually measuring no voltage at the wire feeding the pump itself, or is the pump just not making any noise or running? Forgive me if I missed something earlier.

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Originally Posted by HFarr

When you say you are getting no power to the fuel pump... Are you actually measuring no voltage at the wire feeding the pump itself, or is the pump just not making any noise or running? Forgive me if I missed something earlier.

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I am holding my multimeter leads to the connections on the pump while someone else cranks the key. No voltage at any point.