New 2015 Phazer Fuel Pump not Priming, No start

[Alberta Farmer]

Hello all, I'm new to the forum, and new to Yamaha four strokes. We got my boys a new, but 2015 model year phazer MTX.
I realize the fuel pump relay issue has been beat to death on here, but I think this is something different.
Was running great for a few rides. But as of today when I turn the key, the pump doesn't prime, but does turn over. The history is this: The last day it ran it started very hard, and almost couldn't get it going, even warm. Then it was shut off for a few minutes and wouldn't start at all, fuel pump still working at this point. Concluded it had fouled plugs, which I didn't have on hand. Had been tipped on its side a few times and stalled hot, and I am also guilty of holding throttle open while trying to start it( I know better now, thanks to reading on this forum). |

Let it sit for a while and tried again, this time fuel pump wouldn't go. I understand that the 2015 should have the updated solid state relay, and the far right relay is red. Warmed all relays up with hair dryer, no change. Fuses are all good. It was fairly cold at the time, and I did add a bit of gas line antifreeze. Haven't checked for voltage anywhere yet. Where should I be looking? No codes on display.

Finally got into the spark plugs, that is an interesting procedure, can't wait to try that on the trail...

Anything else I really need to know about this thing, always ran 2 stroke Ski-Doos before, so this is all new to me. Already learned what to do after tipping on RHS and loosing oil pressure...

Thanks in advance.

 

[Mooseman]

It could be the relay. It could be defective despite being the updated solid state version. To quickly test this, swap it with one of the other ones (like the one for the fan). Even though it's not solid state, it would still work as a test.

 

[Alberta Farmer]

Managed to remove the relay, verified by wiring diagram that the red one is the fuel pump relay. checked with voltmeter, when the key is turned on, the signal wire has power for a few seconds like it should, but the red/blue to the fuel pump doesn't. So I swapped with the next relay, standard black relay. Now it clicks like it should, but still no power on the red/blue to the fuel pump, either end. Then checked the power wire to the relay, no power.
Then downloaded the wiring diagram. And learned that there are more fuses not in the fuse box. Now I feel really smart, blown fuse all along. Attached to the solenoid, completely hidden by wires. So what would cause that to blow? Frozen water/fuel in fuel pump? Low voltage from cranking?

 

[Alberta Farmer]

It could be the relay. It could be defective despite being the updated solid state version. To quickly test this, swap it with one of the other ones (like the one for the fan). Even though it's not solid state, it would still work as a test.

And thank you for the advice. I did just that too.

 

[blueironranger]

Yes, low voltage could cause a fuse to blow if a circuit is close to the fuses rating. A voltage drops the current goes up, and fuses are current rated. Could also be the fuel pump, doubtful, but it could be one of those 1 in a 1000 things. Shouldn't ever need to worry about the plugs, 7,000 miles on mine and only changed them once as a preseason maintenance item. When warm, mine has always needed a quick "blip" of the throttle once it fires to keep it running or it will die right away.

 

[Mooseman]

Oh, and you should check the fuse. Oops. too late
Sometimes it is the simplest things. Do carry spares just in case.

 

[Alberta Farmer]

Pump is pumping, installed new plugs, and still no start. Apparently fouled plugs were not the problem. Where do I look now, besides, warranty? Have it warming up, just in case it is an ice issue.

 

[Alberta Farmer]

No codes show up, is there any reason to go into the diagnostics mode when there are no code indicated?

 

[Mooseman]

What does the oil smell like? I had a car that always had starting issues when damp and would flood the engine regularly. So much that the oil was full of gas. So each time it flooded, I had to change the oil.

 

[Alberta Farmer]

Have Spark, have fuel at fuel rail, but no fuel coming from injectors. No codes showing. Where to now?

 

[Mooseman]

So you saying you're not getting fuel spray? I'd say if it's under warranty, bring it in to the dealer. This is getting beyond a novice DIY problem.

 

[Alberta Farmer]

Dealer couldn't look at it for more than a week. But it is there now. Kids will have to wait.

 

[Mooseman]

Do let us know what they find. Would be interesting to know.

 

[maim]

And?