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Stilletto replied to the thread Please help with HPDI issues.

I sent the injectors to Brucatos. He said that they worked and flowed correctly, and replaced the orings. They did mention that one had...

Tuesday at 3:50 PM
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Stilletto replied to the thread Please help with HPDI issues.

I am assuming you mean the pressure in YDS of the HP fuel pump? That's 675 at idle and 750psi at 1500rpm. YDS also does correctly detect...

Monday at 5:11 PM
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Stilletto replied to the thread Please help with HPDI issues.

I tested the stator as per the Yamaha specs and it is functioning properly. The coils are able to spark 1 inch consistently. Motor just...

Monday at 2:44 PM
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Stilletto replied to the thread Please help with HPDI issues.

The voltage from the stator is very confusing. If I unplug the single green wire and measure the voltage, it's at 25 volts idle, which...

Nov 8, 2025
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Stilletto replied to the thread Please help with HPDI issues.

ECU actually. And from my understanding, rarely the issue but there's always exceptions

Nov 6, 2025
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Stilletto reacted to 99yam40's post in the thread Please help with HPDI issues with Like.

the stator has the charge coils, pulsar coils and lighting coils. your service manual should give you the minimum peak voltage readings...

Nov 6, 2025
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Stilletto replied to the thread Please help with HPDI issues.

Agreed. Tomorrow I will measure the voltage coming from the stator also.

Nov 5, 2025
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Stilletto replied to the thread Please help with HPDI issues.

Spark looks orange and not very impressive from all 6 coils. I am suspecting the stator now. Anyone had experience with a weak stator?

Nov 4, 2025
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Stilletto replied to the thread Please help with HPDI issues.

Bought a new battery, coils and spark plugs installed. No change. I went out yesterday and idled around the river. Smelt really strong...

Nov 3, 2025
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Stilletto replied to the thread Please help with HPDI issues.

It reports voltage in YDS as within spec but you never know I guess. I got the coils today, spark plugs tomorrow.

Oct 29, 2025
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Stilletto replied to the thread Please help with HPDI issues.

It does have an O2 sensor. It tests OK and I cleaned the "sniffer tube". It was quite nasty. I will check the neutral switch operation...

Oct 28, 2025
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Stilletto replied to the thread Please help with HPDI issues.

I also noticed that if I pull each injector wire (one at a time) the rpm picks up and smooths a little. This suggests to me a global...

Oct 27, 2025
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Stilletto replied to the thread Please help with HPDI issues.

I'll check that in YDS for sure. I ordered 6 coils and 6 new plugs. After those things, i'll be at a loss.

Oct 27, 2025
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Stilletto reacted to 99yam40's post in the thread Please help with HPDI issues with Like.

those motors limit RPM in neutral by cutting off more cylinders that just the 2 it drops in neutral make sure the motor knows when you...

Oct 27, 2025
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Stilletto replied to the thread Please help with HPDI issues.

Didn't work.....runs the same exact crappy way. I noticed that when I pull several spark plug wires, there isn't much/and effect on the...

Oct 24, 2025

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