guzziriders.org - moto guzzi forum Homepage
Forum Home Forum Home > Technical > Small Blocks
  New Posts New Posts RSS Feed - My V7 has developed a "stutter"
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

My V7 has developed a "stutter"

 Post Reply Post Reply Page  <123
Author
Message
Mike H View Drop Down
Senior Member
Senior Member
Avatar

Joined: 21 May 2014
Location: East Anglia
Status: Offline
Points: 5718
Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2018 at 02:40
there you go, all it was was a ‘bad’ connector. 
"Chicken nuggets don't dance on a Tuesday."
Back to Top
Cylvabirch View Drop Down
Senior Member
Senior Member
Avatar

Joined: 02 Jun 2014
Location: Whitehill
Status: Offline
Points: 238
Post Options Post Options   Thanks (0) Thanks(0)   Quote Cylvabirch Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 10:05
Latest update. She was still not behaving herself when hot and I really struggled to keep her going in slow heavy traffic. She kept surging between about 1400 and 850 rpm unless I held her on the throttle and would conk out at about if she dropped to 800.
I then bought myself the correct interconnect from Lonelec and downloaded GuzziDiag onto an ancient Windows laptop. To begin with I simply could not understand how to do a TPS reset and fiddled around with the trottle stop screw to try to find a stable idle setting, to no avail.
Thanks to Facebook Messenger I was able to contact Mark Bayley in New Zealand who writes new maps for Guzzis. He was appalled that I had EVER have touched the throttle stop screw!!! He guided me through getting the bike back to a stable idle by very carefully adjusting the throttle stop and doing a TPS reset at every step. I am very grateful.
I now await a chance to ride her again and hopefully benefit from Mark’s expertise.
Whilst more comfortable with carburettors, I now feel I have dipped my toe into the 21st century and am fascinated watching all the parameters being displayed on GuzziDiag when the bike is running.
As Mark wrote “Step away from the throttle stop screw”!
David.
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 8973
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 13:14
That screw should have been sealed with paint, which might give a clue about not touching it. It's factory set and Guzzi warn that any tampering with it will cancel the warranty on the throttle body.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
Cylvabirch View Drop Down
Senior Member
Senior Member
Avatar

Joined: 02 Jun 2014
Location: Whitehill
Status: Offline
Points: 238
Post Options Post Options   Thanks (0) Thanks(0)   Quote Cylvabirch Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 16:52
Mine wasn’t.
So perhaps some previous owner had fiddled with it.
Oh well, onward and upward in the learning process.
David.

Back to Top
Cylvabirch View Drop Down
Senior Member
Senior Member
Avatar

Joined: 02 Jun 2014
Location: Whitehill
Status: Offline
Points: 238
Post Options Post Options   Thanks (0) Thanks(0)   Quote Cylvabirch Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 17:24
I seem to recall reading somewhere about a procedure where the ignition is switched on but engine not started, twist grip turned a few times and then everything switched off.
Am I going mad?
If not, what does it do?
David.
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 8973
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 17:33
My understanding is that there is a proceedure such as that to restore factory settings for the ECU.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
V7Chris View Drop Down
Senior Member
Senior Member


Joined: 13 May 2017
Location: Shropshire
Status: Online
Points: 986
Post Options Post Options   Thanks (0) Thanks(0)   Quote V7Chris Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 17:42
Originally posted by AureusGriffon AureusGriffon wrote:

So I've disconnected the lambda (there's only one sensor on my model) and it seems to have cured the stuttering while under power. I will have to take a longer ride to confirm for sure. It also helped the rough idle a bit but it returned, albeit manageable.

I'm looking to solve this problem entirely so I'm still going to investigate the ECU.

Originally posted by Andyb Andyb wrote:

Look for signs of arcing on the plug tops


What signs should I be looking for? Sorry but I'm a novice.

Has your issue now been resolved? I hope so and I hope you are still enjoying the V7. 
Back to Top
Cylvabirch View Drop Down
Senior Member
Senior Member
Avatar

Joined: 02 Jun 2014
Location: Whitehill
Status: Offline
Points: 238
Post Options Post Options   Thanks (0) Thanks(0)   Quote Cylvabirch Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 18:08
Chris,
A major improvement since Mark Bayley helped me to come back from a very dark place having innocently moved the forbidden throttle set screw.
My slow running speed is a bit high and also my throttle cables were very loose from when I was trying to sort the bike out prior to GuzziDiag and Mark’s help. I rode the bike today and the improvement is enormous but the twist-grip felt very slack indeed. I have taken up some slack in both cables but need to ride it again to see if it is OK.
David.

Back to Top
V7Chris View Drop Down
Senior Member
Senior Member


Joined: 13 May 2017
Location: Shropshire
Status: Online
Points: 986
Post Options Post Options   Thanks (0) Thanks(0)   Quote V7Chris Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 22:01
That's good. I was just wondering how the newbie - AureusGriffon who started the thread was getting on as they haven't confirmed that their issues have been resolved. 
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 8973
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2018 at 22:16
The thing to do is remove all the slack in the cables then turn the bars from lock to lock to make sure the tickover speed doesn't vary. If it does slacken off a bit.
The less slack in the cable the less snatchy low speed running will be.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
 Post Reply Post Reply Page  <123
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.00
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.047 seconds.