Phazer engine HELP needed, non-sled application.

[cannondale27]

The Yellow wire is the wire that would give the throttle position to the ecu. If the range is progressive when throttle is opened and not skipping all over the TPS is working. What about one or both injectors being stuck open or being held open? You could check that with a Noid light or even a test light.

 

[Bullnerd]

I had the injectors cleaned and tested at a bike shop.

 

[cannondale27]

The injectors themselves are probably fine but if there is power to them they will stay open and gas will flow. You need to know that they are cycling on and off. A Noid light or test light will show you that.

 

[Bullnerd]

S#!t...I forgot about the noid light trick.

Is there a specific noid light that you can recommend?

 

[cannondale27]

One that fits our plug. Usually come in a kit . Sorry I havent had cause to do it on a Yamaha. Another option is to just remove the injectors and see if they are pulsing the fuel into a jar. Disconnect the coils and be very careful since fire danger is real high this way.

 

[Bullnerd]

Thanks Cannondale,that might be quicker than trying to track down the proper noid light.

I just want this thing to run!

 

[Bullnerd]

Well I'm getting closer. Its not firing on cyl #2. And its not the coil. I havent had time to go any farther.

 

[Bullnerd]

It appears one cylinder is not firing. The header is not discolored and the plug is different from one to the other.

 

[yamahas]

Like a different spark plug or coloured differently?

 

[Bullnerd]

Like one is rich and one in not seeing anything?The plugs are the same and new (were new!)

So ,pulled the injectors.

One injector not firing and it moves with the harness not the injector.

It fires a little better when the batt charger is hooked up but without it...nothin or really weak.

Without charger,
without - YouTube

With charger,
with - YouTube

Sooo, crank sensor? ECM? No idea where to start!

 

[cannondale27]

Are they stock coils? Coils can go bad. Try switching the coils and see if it works in the dead cylinder. Same with injector. Hopefully they do. If not you have a wiring issue and you need to talk to the guy who made your harness. Heck maybe it is caused by not having all the components connected. That would somewhat make sense since most FI injection systems are Total loss for a time until either a certain rpm,time or temperature are reached. This prevents fouling. Our system is not like points. If it fires one crank sensor is eliminated.

 

[cannondale27]

Just watched your videos. I think you have a bad connection somewhere.

 

[Mooseman]

Could be a weak injector. Try swapping them side to side. If the weak spray is now on the left, then the injector is bad. If it's still on the right, then it's something up in the wiring or electronics. Maybe a weak battery could have something to do with it.

Why did you have them "professionally" cleaned? If it was running fine before, I don't understand the need for it. Maybe the cleaning solution was too strong or the pressure. Maybe something got dislodged and jammed things up. I have never heard of these getting cleaned before except maybe with an additive in the gas and just as a preventative. I have not heard of these failing neither.

I have heard of the ignition coils failing a couple of times though. Have you checked for spark?

 

[Bullnerd]

Could be a weak injector. Try swapping them side to side. If the weak spray is now on the left, then the injector is bad. If it's still on the right, then it's something up in the wiring or electronics. Maybe a weak battery could have something to do with it.

Why did you have them "professionally" cleaned? If it was running fine before, I don't understand the need for it. Maybe the cleaning solution was too strong or the pressure. Maybe something got dislodged and jammed things up. I have never heard of these getting cleaned before except maybe with an additive in the gas and just as a preventative. I have not heard of these failing neither.

I have heard of the ignition coils failing a couple of times though. Have you checked for spark?

My first thought was the injector was clogged.They sat for three yrs with out running so I had them cleaned and flow tested at a bike shop.Spark is good.The battery was weak,once charged it looks like the vid with the charger is more accurate.One injector is spraying much more fuel than the other.Its not the injector,it stays with the harness.Meaning injector harness for cyl 1 is faulty. It was never running before,well in this cofiguration anyway.The sled ran and the wiring harness ran on another engine but never together. What would cause one ijector(actually connector) to flow more fuel than the other? I have no idea.

 

[Bullnerd]

It seems like one injector is pulsing twice for every one pulse of the other injector. You can see it in the video wiht the battery charger.

So what triggers the ECM, the crank or the cylinder identification sensor?