2017 Z1 intermittent no start / fuel pump?

[Zackdogg]

if i do get a new fuel pump, whats the replacement process like? Do i have to relieve pressure before disconnecting the line? and how to you even connect the new line?

My biggest headache was it broke full of fuel, so the tank was 500-ish pounds to drag out, in a weird position, so that was a back breaker. I’d definitely siphon or pump the fuel out of the tank, before I did it that way again. I pulled the whole center section of my floor out of the boat, so it was out of my way. Other than that it’s kind of a take it apart, and put it back the same way sort of process. You do need a special tool (like $10 from any auto parts store) for those high pressure fuel fittings not sure what they’re called) don’t try and use pliers or something you’ll mess them up. I didn’t do anything to relieve pressure. I’m going to put a pressure gauge inline somewhere to check that pressure if this ever happens again. If you checked that pressure, before you messed with that pump, you’d at least know that much. Also keep in mind I have an RZX, so it might be a little different, but guessing it isn’t all that much different.


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[Dman223]

My biggest headache was it broke full of fuel, so the tank was 500-ish pounds to drag out, in a weird position, so that was a back breaker. I’d definitely siphon or pump the fuel out of the tank, before I did it that way again. I pulled the whole center section of my floor out of the boat, so it was out of my way. Other than that it’s kind of a take it apart, and put it back the same way sort of process. You do need a special tool (like $10 from any auto parts store) for those high pressure fuel fittings not sure what they’re called) don’t try and use pliers or something you’ll mess them up. I didn’t do anything to relieve pressure. I’m going to put a pressure gauge inline somewhere to check that pressure if this ever happens again. If you checked that pressure, before you messed with that pump, you’d at least know that much. Also keep in mind I have an RZX, so it might be a little different, but guessing it isn’t all that much different.


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thank you. i dont need to remove my tank the pump comes right out the top. Sounds pretty straight forward then. I have to check how my hose connects to the regulator i didnt see the crimp fitting.

[Zackdogg]

thank you. i dont need to remove my tank the pump comes right out the top. Sounds pretty straight forward then. I have to check how my hose connects to the regulator i didnt see the crimp fitting.

That’s good news, pulling the tank back was the biggest hassle, I do remember that part. You can see what those fitting look like on mine, and those are the tools to release those pressure fitting. Good luck with it, happy to help where I can!!



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[Zackdogg]

thank you. i dont need to remove my tank the pump comes right out the top. Sounds pretty straight forward then. I have to check how my hose connects to the regulator i didnt see the crimp fitting.

That’s good news, pulling the tank back was the biggest hassle, I do remember that part. You can see what those fitting look like on mine, and those are the tools to release those pressure fitting. Good luck with it, happy to help where I can!!



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[Dman223]

update, i got a malibu fuel pump off ebay, its a 2021, mines a 2023.. so already not feeling great. Then, it doesnt fit in my fuel tank, too tall. So i tore both apart to make the inards of the 'new' one fit inside the old one, buttoned it up and it started fine. now to test it out on the water, ill update this again eventually

[Dman223]

update- after frankensteining the malibu pump from ebay and my old pump i have not ran into a no start since. but now i have a code spn 442 fmi 15. impeller is on order.. this is my 4th boat and ive never had so many issues with my other 3.

[Dman223]

I drove three hours today for a new exhaust sensor and the code is still following the new sensor whether I install it on port or starboard side

[Dman223]

with new fuel pump, i am still getting all my same symptoms no start, stalling, low fuel pressure. I even had the boat complete shut off while at idle speed with no codes one time.

[Zackdogg]

with new fuel pump, i am still getting all my same symptoms no start, stalling, low fuel pressure. I even had the boat complete shut off while at idle speed with no codes one time.

Dang, that sucks so bad. I’ve chased these gremlins in mine, on a couple of different occasions, and I’ve had them disappear without being positive what fixed them, and I still wonder constantly if they’re going come back at some point. I feel your pain, for sure.

I did have some issues with mine shutting off, once in a gnarly storm, right after I did my fuel pump. The way the new pump was clocked, the pump wires were stretched tight after install, I lengthened the wires after that trip, and never had the issue again, but I still don’t know if the wires were the issue.

I’d really like to know what’s going on with your boat. I’d probably put a pressure gauge on there, just for my peace of mind, first. I’ve always wondered what my pressures were when having these issues. You changed the pressure sending unit, correct? None of that would explain it dying, but potentially for the codes.


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[Dman223]

it has been happening less, thats for sure. but its definitely not 100% fixed like i was hoping. the only other thing i havent replaced is the pressure regulator.. might that be bad? ill get another one of those too if its another thing to try and replace. can they fail and cause the pump to not pump? because that's what's happening still, ill turn the key and there will be no priming = no start

[Zackdogg]

it has been happening less, thats for sure. but its definitely not 100% fixed like i was hoping. the only other thing i havent replaced is the pressure regulator.. might that be bad? ill get another one of those too if its another thing to try and replace. can they fail and cause the pump to not pump? because that's what's happening still, ill turn the key and there will be no priming = no start

The regulator is on the pump, correct? Can you buy that on its own, I’ve never checked.

How long are you cranking it, when it doesn’t start? It all sounds like it could be pressure issues. I’d probably put a gauge on it to check it off, see if it’s bleeding down when sitting. If it isn’t holding pressure, that pressure is fluctuating a bunch, or if it’s always consistent, at least you know that much, and what to chase. If the pressure is all good, maybe an injector or spark issue? I’m going to install a permanent gauge on mine, so I can always check that, before knowing what to look at next. I also had coil packs fail on mine, but they never caused an issue, I was just getting codes for misfires, changed factory out with MSDs, and they’ve been good since. Probably just jinxed myself!!


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[Zackdogg]

it has been happening less, thats for sure. but its definitely not 100% fixed like i was hoping. the only other thing i havent replaced is the pressure regulator.. might that be bad? ill get another one of those too if its another thing to try and replace. can they fail and cause the pump to not pump? because that's what's happening still, ill turn the key and there will be no priming = no start

The regulator is on the pump, correct? Can you buy that on its own, I’ve never checked.

How long are you cranking it, when it doesn’t start? It all sounds like it could be pressure issues. I’d probably put a gauge on it to check it off, see if it’s bleeding down when sitting. If it isn’t holding pressure, that pressure is fluctuating a bunch, or if it’s always consistent, at least you know that much, and what to chase. If the pressure is all good, maybe an injector or spark issue? I’m going to install a permanent gauge on mine, so I can always check that, before knowing what to look at next. I also had coil packs fail on mine, but they never caused an issue, I was just getting codes for misfires, changed factory out with MSDs, and they’ve been good since. Probably just jinxed myself!!


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