The dreaded Intermit - MVAgusta.net
 2Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 33 (permalink) Old 05-30-2017, 10:21 AM Thread Starter
MV1
Senior Member
 
MV1's Avatar
 
Join Date: May 2006
Posts: 1,125
Unhappy The dreaded Intermit

The dreaded intermittent stall issue..

I have a 2005 MV Agusta F4-1000 that I've had for awhile and ridden happily for over 10yrs now both for track and street. I've had some things come up over the years including the EBS relay etc and have been able to troubleshoot and address most myself with help occasionally from fellow forum members here on the site as well.

I have a couple of other bikes and don't ride it all the time, but more recently I've had a kind of crazy intermittent power-interrupting problem develop that causes the bike to lose power mid-flight repeatedly once at temperature and almost immediately return power over and over again repeatedly until the bike eventually fails and stalls out completely.

I'm not talking the typical EBS relay- Lose a cylinder or two, but rather a full lose of entire power momentarily before its repeatedly and rapidly restored on and off causing and on-and-off scenario like a bronco before the bike stops all together.

Anyone have any ideas on this? or familiarity with this type of condition on the MV before?

So far I have changed the fuel pump assembly, filter and hoses etc- all new along with new set of ignition wires (*which did need to be changed really at this point anyway) and plugs of course. Although the bike feels great otherwise and pulls with great power from the start, eventually after a few miles and the bike is also fully up to proper operating temp the problem persists, which brings me next to the ignition coils that I haven't changed yet, but I'm honestly not sure is going to work anymore.

Any thoughts or experiences in this area?

PK
MV1 is offline  
Sponsored Links
Advertisement
 
post #2 of 33 (permalink) Old 05-30-2017, 07:07 PM
Senior Member
 
Join Date: Jun 2007
Location: Calga, NSW
Posts: 1,236
Engine cuts in and out but dash still on, like someone is playing with the kill switch ? Sounds electrical, dodgy contact, iffy switch ( clutch or side stand switch?), kill switch itself, the list could be long!
rsawkins is online now  
post #3 of 33 (permalink) Old 05-31-2017, 04:27 AM
Senior Member
 
silentservice703's Avatar
 
Join Date: Feb 2008
Location: Duxbury, MA, USA
Posts: 20,823
Send a message via Skype™ to silentservice703
...a bad ground to the ECU....
gotojoe and gotojoe like this.

Gapalicious 2019 at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
from OCTOBER 2-6, 2019

Call (423) 519-2000 or (423) 253-6213 to reserve your Riverfront Cabin. PM me for The Crow's Nest reservation!!!

Email/Paypal:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


My personal Cell Phone: (781) 223-3020


'07 F4 312R, '10 B4 1090RR, '15 B3 800RR
'07 Ducati Monster S4Rs, '07 Ducati Monster 695
2010 Harley Davidson Ultra-Classic Electra-glide CVO FLHTCUSEBLK
'63 Honda C100A Cub
'61 MVA TRA 125
silentservice703 is offline  
Sponsored Links
Advertisement
 
post #4 of 33 (permalink) Old 05-31-2017, 07:30 AM
Old Wing Nut
 
esq'z me's Avatar
 
Join Date: Aug 2007
Location: Marietta, GA
Posts: 17,952
Send a message via Skype™ to esq'z me
Dash power stays on, just engine stops?
CKPS is sitting on the side of the engine, subject to heat and vibration. Test it....resistance, insulation, peak voltage output. Both when cold and again after warm and problem begins.

This is a very likely culprit (relatively rare, but not uncommon on higher mileage bikes of all brands). One of 3 primary inputs for EFI operation.

I used to be fast....now I just dream about it.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, 2015 Indian Chieftain (Rita) my "low-n-slow", '70 Suzuki F50 (Baby Blue), 2018 Suzuki GSX-S750L8 (Susie Q)
esq'z me is offline  
post #5 of 33 (permalink) Old 05-31-2017, 07:40 AM
Senior Member
 
silentservice703's Avatar
 
Join Date: Feb 2008
Location: Duxbury, MA, USA
Posts: 20,823
Send a message via Skype™ to silentservice703
Ed, what is CKPS?

Gapalicious 2019 at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
from OCTOBER 2-6, 2019

Call (423) 519-2000 or (423) 253-6213 to reserve your Riverfront Cabin. PM me for The Crow's Nest reservation!!!

Email/Paypal:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


My personal Cell Phone: (781) 223-3020


'07 F4 312R, '10 B4 1090RR, '15 B3 800RR
'07 Ducati Monster S4Rs, '07 Ducati Monster 695
2010 Harley Davidson Ultra-Classic Electra-glide CVO FLHTCUSEBLK
'63 Honda C100A Cub
'61 MVA TRA 125
silentservice703 is offline  
post #6 of 33 (permalink) Old 05-31-2017, 08:58 AM Thread Starter
MV1
Senior Member
 
MV1's Avatar
 
Join Date: May 2006
Posts: 1,125
Yes the power to the dash does stay on and yes the bike does have now what would be considered a sizable amount of mileage for a Italian exotic (about 20,000). And although I haven't journeyed with the bike far at all now since the problem began at the end of last season it does appear to get progressively worse as you go along and have been riding it for a few miles, with the bike later restarting again once given the time to cool. The Crank Position Sense

Last edited by MV1; 05-31-2017 at 09:04 AM.
MV1 is offline  
post #7 of 33 (permalink) Old 05-31-2017, 09:58 AM
Old Wing Nut
 
esq'z me's Avatar
 
Join Date: Aug 2007
Location: Marietta, GA
Posts: 17,952
Send a message via Skype™ to esq'z me
Quote:
Originally Posted by silentservice703 View Post
Ed, what is CKPS?
Crankshaft Position Sensor...that thing down on the left side that the "phonic wheel" spins around next to. Essential signal for EFI (Where is the piston in the stroke, and how fast is it moving). When they start to fail it usually manifests itself as heat rises. Signal gets weak or goes away. Usually a short to ground in the winding.

Don't know the peak voltage (RMS) spec for the MV (haven't looked to see if it's listed) but a common number is >2 volts. Comparing cold to hot readings is the best test.

I used to be fast....now I just dream about it.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, 2015 Indian Chieftain (Rita) my "low-n-slow", '70 Suzuki F50 (Baby Blue), 2018 Suzuki GSX-S750L8 (Susie Q)

Last edited by esq'z me; 05-31-2017 at 10:02 AM.
esq'z me is offline  
post #8 of 33 (permalink) Old 05-31-2017, 10:18 AM
Senior Member
 
silentservice703's Avatar
 
Join Date: Feb 2008
Location: Duxbury, MA, USA
Posts: 20,823
Send a message via Skype™ to silentservice703
I just didn't recognize the acronym....

Gapalicious 2019 at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
from OCTOBER 2-6, 2019

Call (423) 519-2000 or (423) 253-6213 to reserve your Riverfront Cabin. PM me for The Crow's Nest reservation!!!

Email/Paypal:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


My personal Cell Phone: (781) 223-3020


'07 F4 312R, '10 B4 1090RR, '15 B3 800RR
'07 Ducati Monster S4Rs, '07 Ducati Monster 695
2010 Harley Davidson Ultra-Classic Electra-glide CVO FLHTCUSEBLK
'63 Honda C100A Cub
'61 MVA TRA 125
silentservice703 is offline  
post #9 of 33 (permalink) Old 05-31-2017, 10:27 AM Thread Starter
MV1
Senior Member
 
MV1's Avatar
 
Join Date: May 2006
Posts: 1,125
Yes esq'z me- I have to say I believe your are on to something here. The behavior is unlike anything else I've ever experienced on a bike in general and is even unique to a typical intermittent wiring issue, such as a short, bad or "going" fuel pump or even a ignition coil having lost a winding etc. In this it's behavior would seem to lend it itself more to something like you are describing, such as the CKPS, or in relation to something the computer system is attempting to interpret signal from now failing.

I thank you for this, as I think you have given me a very good lead to go by here now.

If anyone has possession of the exact resistance readings I should look for in testing the current CKPS sensor and can share them here with us that would be great, otherwise I'm just going to do a bit more research myself before I proceed, but thank you brother- I think you've given me a good starting point to continue from now- Much appreciated!
MV1 is offline  
post #10 of 33 (permalink) Old 05-31-2017, 09:58 PM
Senior Member
 
theknurl's Avatar
 
Join Date: Jul 2009
Location: Palos Verdes Est, SoCal, USA
Posts: 13,806
Send a message via Skype™ to theknurl
Exclamation enough of the idiotic acronyms....

Chuck and​ I didn't know what you were talking about Ed.......type it out......

This is a Worldwide Forum.......not everyone​ speaks technical English and most translator apps suck at technical terms

look in the Engine Manual......

what's a "carter"?.......if you research it , it means oil sump in automotive usage.....chain guard on a bicycle​....

they meant crankcase......

then they call the crankcase a "bedplate"

See what I mean?


Noel-theknurl

The Forum Curmudgeon
I'm not PC either
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'08 910R
'05 F4
ph. 310-414-7247 PST, GMT -8
PayPal;
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Skype; theknurl
theknurl is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to use all of the features of the MVAgusta.net site, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome