Not running smooth

[B.Reagh]

Started up bike last week, didn't sound quite right rode about 3 miles and then started acting up.
Got it home and had trouble just to get it up the drive.
Lifted the tank and with it idling rough I unplugged the MAP sensor and it smoothed right out,
the engine light did come on when unplugged not while running before.
When started unplugged it runs fine, have not tried to ride it unplugged, I have replaced
the sensor but the same things happen. I plug it back in once unplugged and it stays smooth.
Any ideas?

 

[warp9.9]

Started up bike last week, didn't sound quite right rode about 3 miles and then started acting up.
Got it home and had trouble just to get it up the drive.
Lifted the tank and with it idling rough I unplugged the MAP sensor and it smoothed right out,
the engine light did come on when unplugged not while running before.
When started unplugged it runs fine, have not tried to ride it unplugged, I have replaced
the sensor but the same things happen. I plug it back in once unplugged and it stays smooth.
Any ideas?

I would check the vacuum lines coming from the throttle bodies to the Map sensor. There is one off each TB to a plastic fitting reducing it down to the large one going to the MAP sensor. There is also four blank off plugs to the extra vacuum port on each throttle body and two of them on the #3 TB these also dry rot and crack giving a faulty erratic vacuum. This erratic vacuum equates to a erratic signal voltage from the MAP sensor. Your Lamba fueling table is jumping all around erratically.

 

[B.Reagh]

I would check the vacuum lines coming from the throttle bodies to the Map sensor. There is one off each TB to a plastic fitting reducing it down to the large one going to the MAP sensor. There is also four blank off plugs to the extra vacuum port on each throttle body and two of them on the #3 TB these also dry rot and crack giving a faulty erratic vacuum. This erratic vacuum equates to a erratic signal voltage from the MAP sensor. Your Lamba fueling table is jumping all around erratically.

I'll pull the air intake off tomorrow and check all the plugs, thanks for the info.

 

[B.Reagh]

I would check the vacuum lines coming from the throttle bodies to the Map sensor. There is one off each TB to a plastic fitting reducing it down to the large one going to the MAP sensor. There is also four blank off plugs to the extra vacuum port on each throttle body and two of them on the #3 TB these also dry rot and crack giving a faulty erratic vacuum. This erratic vacuum equates to a erratic signal voltage from the MAP sensor. Your Lamba fueling table is jumping all around erratically.

Ok, couldn't wait so went out to check it. I didn't mention that the 4way fitting was cracked so I put in 2 Ts instead.
I checked everything out lines all look good. So I put a vacuum gauge on the hose going to the MAP sensor and it was bouncing back and
forth. Put a clamp on the hose until the needle leveled out then hooked it back to sensor, fired him up and all seems good.
Can that little 4 way fitting be the problem or what.
Also what is the deal with the 3 different map readings on tune boy I have
1 at 54.7, 2 at 45.7, 3 at 45.7

 

[Pedro]

Yes that will do it ,and the reading for all three should be the same or very close to, no 1 and no 3 need to be adjusted to number 2.

 

[B.Reagh]

Yes that will do it ,and the reading for all three should be the same or very close to, no 1 and no 3 need to be adjusted to number 2.

And that is done like synchronizing a carb bike, the screws between the throttle bodies?

 

[Pedro]

correct use tune boy to see the change and make adjustment to number 1 and number three if required it in manual if you have .

 

[Pedro]

you can see here

 

[B.Reagh]

you can see here

Got it that is what I thought. I'll do that and have a new 4way fitting on the way.
Thanks

 

[warp9.9]

After you adjust the TB blip the throttle a couple times and check before moving to the other throttle body. Like Peter said one and three to match number two. from your numbers above it looks like number one is the only one out. Of course wait until you get the vacuum sorted out.