Nypex won’t fire

pelon · Feb 23, 2019

Nypex won’t fire

Hey all, my injectors will not operate. No codes .... any thoughts? Sled will not fire up!

Thanks

up-high · Feb 23, 2019

Good battery power? Starter works? Can you hear the fuel pump when you turn on the key?

motojunkie101 · Feb 24, 2019

That happened to my Nytro one year after sitting for the summer. The injectors were gummed up from the ethanol in the fuel. You can try to pull them and see if they are clogged. If they aren't gummed up you can check the fuse box and see if one is blown. You can bench test them pretty easily to see if they are working, there are tons of youtube videos on how to test injectors.

I'd start with the fuse box if you haven't checked it already. Hopefully it is a simple solution.

pelon · Feb 24, 2019

up-high said:
Good battery power? Starter works? Can you hear the fuel pump when you turn on the key?

None of those are issues

pelon · Feb 24, 2019

motojunkie101 said:
That happened to my Nytro one year after sitting for the summer. The injectors were gummed up from the ethanol in the fuel. You can try to pull them and see if they are clogged. If they aren't gummed up you can check the fuse box and see if one is blown. You can bench test them pretty easily to see if they are working, there are tons of youtube videos on how to test injectors.

I'd start with the fuse box if you haven't checked it already. Hopefully it is a simple solution.

Thanks and I would be surprised if all four were clogged but surprises happen and I will check today. I checked the fuses and everything is good. To be more clear, the engine cranks very well, fuel is flowing to the injectors, just nothing after that. Spark plugs are also firing, with no evidence of fouling.

sledfvr · Feb 24, 2019

My apex's will crank and not start if the battery is even a little weak. You may have tried throwing a charger on, but if not then I would try it...
Happened to me and a friend early this season.

pelon · Feb 25, 2019

Thanks all for the quick responses. Turns out all four injectors were clogged, replaced with another set and fired right up. Go figure, I was surprised, 12 years of running Yamahas and never had this happen.

motojunkie101 · Feb 25, 2019

I'm glad you found the problem! You might be able to soak the originals and get them to clear out.

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Nypex won’t fire

pelon

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up-high

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motojunkie101

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pelon

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pelon

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sledfvr

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pelon

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motojunkie101

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