I sent the injectors to Brucatos. He said that they worked and flowed correctly, and replaced the orings. They did mention that one had a short in it, which they hadn't seen very often, but that it disappeared after cleaning. Mentioned that could be caused by injector driver or could just be a...
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 switching from neutral to gear. Also, VST pressure is steady 50psi
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 running very rich and smoking.
60 seconds at 1500 rpm and the plugs are black.
If I unplug the injectors wires from select cylinders, the rpm raises a bit and...
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 sounds OK. But if I plug it back and backprobe, its at 10v. The voltage on the two green wires going to the regulator is also 10v when plugged in but 25v when...
Bought a new battery, coils and spark plugs installed. No change. I went out yesterday and idled around the river. Smelt really strong, not a raw fuel but like a 1969 Nova with no catalytic converter.......never went above 1000rpm.
I also bought a spark tester to see how strong the spark is...
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 thursday in YDS. I did have a problem with it before but I had it working last time I checked.
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 over fueling situation, or inconsistent spark.
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 way it runs even in gear
Got it in today, haven't had a chance to install it yet. If it doesn't solve the issue, the same seller has tons of mint parts that I may need also.
Very impressed.
99yam40, I have been suspecting the Fuel Pressure regulator. It seems to be kind of of sticky, and I think it MAY be sticking and not allowing fuel back into the VST. I have a second hand Complete VST from a 2012 VMAX coming tomorrow. Same part number, and looks identical. It was taken from a...
