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V7 II Fuel/Idle Issue

Kacey3

Kacey3

Tuned and Synch'ed
Joined
Feb 20, 2017
Messages
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Location
Texas
I bought my 2016 V7 II used with only 2500 miles on it, but it has this persistent sputter for the first few minutes, and continues to exhibit inconsistent power at low revs at throughout my rides. Any ideas what could be causing it? Is it something I can take care of myself or should I be scheduling a trip to a service tech?

I have run some Lucas top end cleaner through two full tanks of 93 octane gas and the condition has not improved.

 
trialsn said:
I had a similar issue with mine. I believe it was due to faulty lambda sensors.
Click to expand...
Is that the basic O2 sensor? Did you have it repaired or did you replace the sensor yourself? Mine is not under warranty since it's used, so I am going o to have to pay for it either way.
 
I'm probably the worst person to ask that question, but I THINK it is the same as the O2 sensor. Someone, please correct me if I am wrong.

My bike was under warranty as well so the shop replaced the part. They then checked to see if the engine was firing properly which again would cause a weird idle and some other things as well.

Check out my thread...may be of some help.

https://www.guzzitech.com/forums/threads/throttle-lag.15439/page-3
 
Last edited:
trialsn said:
I'm probably the worst person to ask that question, but I THINK it is the same as the O2 sensor. Someone, please correct me if I am wrong.
Click to expand...
Hahah. I hear ya. I'm only 4 years into motorcycling, and one month into the Guzzi, so it's all pretty new to me.
 
trialsn said:
I'm probably the worst person to ask that question, but I THINK it is the same as the O2 sensor.
Click to expand...
Yes it sure is. Lambda = 02-sensor. Should be warranty fix at no charge to you.
 
Kacey3 said:
My understanding is that the warranty does not carry over to the second owner.
Click to expand...
Then see if you can find someone to swap sensors with as a "see if it fixes it" before you buy a new one. I likely have some used in near new condition.
 
Shouldn't a broken O2 sensor be covered under the Federal Emissions Warranty...? Afaik that does carry over to new owner. Worth checking.
 
CarstenH said:
Shouldn't a broken O2 sensor be covered under the Federal Emissions Warranty...? Afaik that does carry over to new owner. Worth checking.
Click to expand...
If I'm reading the EPA guidelines correctly, it has to fail an emissions test before I can try to claim it... which Texas does not do emissions tests. Yay Texas.
 
Unplug the O2 sensors at the connectors under the side panels and try runing like that. If the problem goes it is definately the O2 sensors, options then are new sensors....or just leaving them unplugged
AndyB
 
As a test this weekend, I unplugged the O2 sensors and I didn't notice any improvement. At least I'm fairy certain that's what I unplugged.

17818121_391721811210099_4682373505012989952_n.jpg
 
Did you unplug the one on the other side of the bike as well?
There are two, one from each exhaust
AndyB
 
A couple of more things to check:
Do you have the latest fuel map; I believe it is 4533V796. I know my dealer up graded mine from the original. You can check the number with GuzziDiag, or ask your dealer.
Are your plug caps making good connection to the plugs? Are the caps shorting to the head? This is a known problem. Besides poor running, another symptom is color (brown, or blue if it's real bad) on the mufflers - fuel that did not burn in the cylinder is burning in the catalytic converter. One of my mufflers was turning brown. I checked the plug connector by first pushing it on further. The one with the brown pushed on further - felt like it moved an eight inch or more. The engine runs better now.
Dan
 
RedHawk47 said:
A couple of more things to check:
Do you have the latest fuel map; I believe it is 4533V796. I know my dealer up graded mine from the original. You can check the number with GuzziDiag, or ask your dealer.
Are your plug caps making good connection to the plugs? Are the caps shorting to the head? This is a known problem. Besides poor running, another symptom is color (brown, or blue if it's real bad) on the mufflers - fuel that did not burn in the cylinder is burning in the catalytic converter. One of my mufflers was turning brown. I checked the plug connector by first pushing it on further. The one with the brown pushed on further - felt like it moved an eight inch or more. The engine runs better now.
Dan
Click to expand...

they screw on. not push.
 
The caps screw into the HT wires but push onto the sparkplug tops.....and the problem is how they fit onto the plugs.
AndyB
 
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