VOG Forum banner
21 - 40 of 63 Posts
Try doing a tps & an IAC reset
 
When I had the coils out I checked from the outside prongs to the center and have cotinouty I've checked the wires and have 4.8 ohm and 5.4 ohm I don't know how to check the injectors. I'm going to order new injectors.
Okay, here is how I (after resetting TPS etc) would check the injectors; Disconnect the coils, Take the rear injector loose and find a way to put it in a container to catch fuel.
Probably best to do this in a safe area like outside. You may need a second person for this potentially sketchy project. Then turn the ignition on. At that point there is usually a push from the fuel pump.

Watch for dripping from the injector. It should not leak. Then if no leaking is observed engage the starter while watching the spray pattern. Engage the starter for an exact time such as 6 seconds. Look at how much fuel is in the container.
Do the same with the front injector. Compare them as they should be the same.
Yeah, not perfect and if you are not careful to disconnect the ignition coils it could be a lot of messing around with limited intel. That said the resulting conflagration would be something you could tell your buddies at the local watering hole in ten years or so after the trauma fades in your memory.

So under no circumstances do you do this without disconnecting the coils!!
 
Discussion starter · #23 ·
W

Okay, here is how I (after resetting TPS etc) would check the injectors; Disconnect the coils, Take the rear injector loose and find a way to put it in a container to catch fuel.
Probably best to do this in a safe area like outside. You may need a second person for this potentially sketchy project. Then turn the ignition on. At that point there is usually a push from the fuel pump.

Watch for dripping from the injector. It should not leak. Then if no leaking is observed engage the starter while watching the spray pattern. Engage the starter for an exact time such as 6 seconds. Look at how much fuel is in the container.
Do the same with the front injector. Compare them as they should be the same.
Yeah, not perfect and if you are not careful to disconnect the ignition coils it could be a lot of messing around with limited intel. That said the resulting conflagration would be something you could tell your buddies at the local watering hole in ten years or so after the trauma fades in your memory.

So under no circumstances do you do this without disconnecting the coils!!
Thanks I'll try this, looks like it's a chore to get the injectors out.
 
Did you download the service manual from BBobs mediafire?

TPS - throttle position sensor.

there is a specific procedure for resetting both the TPS and IAC. Quick and easy place to start
 
  • Agree
Reactions: Bikesofbrads
Okay, before anyone asks; of course I have done this test in the past.

We were riding with a friend in the mountains of Oregon when his bike stopped running. We pulled him to the closest auto parts parking lot. We spent the rest of the day trying to figure out why there was no fuel getting into the cylinders.

After taking the injectors out and testing as described above there was little to no fuel even as we could establish the fuel pump was running and up to pressure. Turned out the plastic fuel lines were not made for alcohol based fuel or heating on the lines caused tiny particles from the inside lining of the fuel line. There was a very fine mesh screen at the inlet of the injectors. The screens were clogged. We were able to use new fuel hose from the parts store and after cleaning out the screens all was good again.

FWIW the Moto Guzzi used injectors made for Lamborghini. No way we were going to find those injectors and the cost for new ones was insane.
 
  • Haha
Reactions: walks35
Throttle Position Sensor / Idle Air Control ( aka idle air control valve ) I’ve had to these resets a couple of times when changing from say sunny 95*F sea level and going 500 miles away into a rainy 75* F & 5000ft of elevation. @tezinsma when did you last gas up
 
As amusing as joking about setting oneself on fire is - really think the process through. I would use a cottage cheese container (empty and clean) perhaps make a hole in the lid just big enough for the injector to fit. Perhaps cover the starter and starter solenoid with a plastic bag. Have a fire extinguisher handy.

I didn’t have the luxury of these items in that parking lot and the spray was easily directed.
 
^^^^ And remember folks, each generation has its own procedure
 
  • Informative
Reactions: Smokier104
Thanks for the IAC reset link. That's a long thread to slog through so here's the short version.

Do the iac reset...cycle key three times without turning on. Listen each time for the iac to make noise. If that fixes it great...if not then take the IAV out of the equation and repeat the reset. That may help. That valve does not bypass the Idle Air Control it limits the volume of air going to the control itself.
 
The thing about the tps and such is that they would affect both cylinders. Yes they should be done first just as a basic rule of thumb. It seems to me that the problem wouldn’t be resolved through these methods since it is an individual cylinder over fueling or possibly ignition timing issue from what is described. But to be fair my training was going to the Porsche factory training programs not Victory.
That training at Porsche indicates that individual cylinder issues would have individual cylinder component failure.
since there is something of a anecdotal nature regarding this happening one time in the past but cleared up after a bit… that leads me to a mechanical issue. Not an engine issue but the mechanical parts in the rear injector. An electrical issue rarely fixes itself although electrical components such as a relay can intermittently fail before totally doing so. A electrical failure in an injector would stop fuel flow not increase it.
All that aside there is a lot of guess work involved here. I have heard a lot of owners talk about a drivability issue and finding that they may experience a fault much differently than a trained technician will.
There is also the reality that working on a specific brand gives insight that other brands do not. There are both similarities and differences between a Japanese bike and a bike made in USA, or a German made automobile for that mater.
 
I have gone to Boba down load and can't find the service manual for my cct 2016
I see quazi already linked it for you, but my screenshot was straight from Bobs list.
Hopefully you have it now.
 
21 - 40 of 63 Posts