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 g11 cold starting issue.

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Guzzi Two Shoes
Montanarolo
Montanarolo


Posts : 21
Join date : 2014-07-17

PostSubject: g11 cold starting issue.   Mon Apr 20, 2015 7:38 am

After 2 years of ownership, my 2006 GRiSO has started to misbehave slightly. A couple of "push the starter button....click" episodes were cured by cleaning the contacts of the fuses (thanks to all the posted advice on here) Now the bike fires up immediately, but wont settle into a regular idle, I'm having to give the motor a whiff of throttle before it settles down.  
More than once, it's fired up, only to stall immediately.
The bikes only done 17,00 miles but I'm not sure if the previous owners did much in the way of servicing.
Oils, filters and plugs have been changed within the the last 2000 miles, valve clearances are spot on.
I vaguely remember reading about stepper motors, is that the likely culprit?
Cheers.
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Pete Roper
GRiSO
GRiSO


Posts : 3767
Join date : 2013-05-29
Age : 59

PostSubject: Re: g11 cold starting issue.   Mon Apr 20, 2015 12:07 pm

Possibly. If you or the PO are or were in the habit of keeping the oil topped up to the 'Full' mark on the dipstick it is likely that considerable amounts of it will if been expelled into the airbox where it will tend to befoul the throttle bodies meaning the butterflies can't close properly. If the TPS is re-set with the plates not fully seated it can cause problems as you describe. Also if the stepper is clogged with oil it can become gummed up and reluctant to compensate.

I'd be pulling off the TB's and giving them a thorough clean, spray some Carby cleaner through the stepper and then re-mount them. Balance them properly and then re-set the TPS and self learning parameters and see if it cures it.

Pete
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Guzzi Two Shoes
Montanarolo
Montanarolo


Posts : 21
Join date : 2014-07-17

PostSubject: Re: g11 cold starting issue.   Mon Apr 20, 2015 11:34 pm

Cheers Pete, cleaning & resetting the TB's has been on my "to do list" for quite a while.  I've always found an excuse not to because hooking my bike up to a laptop scares the hell out of me!!
I'll have a look at your earlier posts on how to do it and crack on.
Simon.
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Pete Roper
GRiSO
GRiSO


Posts : 3767
Join date : 2013-05-29
Age : 59

PostSubject: Re: g11 cold starting issue.   Tue Apr 21, 2015 12:26 am

There is nothing to be scared of. Hooking up a computer and using Guzzidiag CANNOT root your ECU or otherwise destroy your motorbike.

Fiddling with *Physical* adjustments like the throttle stop screws? That's different. But as long as when you remove the TB's for cleaning you don't fuck about with the linkage rod or the stop screws you'll be golden.

The is a lot of shite put out *There* about how simple tuning of a FI bike is severely complicated and requires the ability to slay chickens in a certain way and then read their auguries accurately otherwise you will turn your bike into and expensive paperweight! Problem is that the people who promulgate these sorts of fictions would also have you believe that setting points or tuning a carburetor was also the province of Demi-gods!

The only thing you have to fear is fear itself. Nobody is asking you to build a map, that is, a step above the home mechanic, or even my limited abilities, but tuning a W5AM Guzzi is so easy as to be practically effortless. So much so that I can only charge between $350/400 usually for a service/tune including consumables! If I could reasonably charge more I would but I can't, so I try to make money by advising people on what works and then selling it to them! I'd rather make a lot of 'Small' profit than rob people blind for shit they don't need and services that aren't delivered!

If you can change your oil you can tune your GRiSO. If you choose not to? That's fine! But don't be scared of the poxy thing. It's easy!

Pete
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Guzzi Two Shoes
Montanarolo
Montanarolo


Posts : 21
Join date : 2014-07-17

PostSubject: Re: g11 cold starting issue.   Tue Apr 21, 2015 6:57 am

Sod it, I've ordered the cables, will download the software and will go for it.
Is the stepper motor easily accessible, I assume I don't need to remove it?
Cheers for the encouragement!!
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Pete Roper
GRiSO
GRiSO


Posts : 3767
Join date : 2013-05-29
Age : 59

PostSubject: Re: g11 cold starting issue.   Tue Apr 21, 2015 10:30 am

Stepper sits in between the throttle bodies. It's a sod to get to but is quite possible once the tank is off.

Pete
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Gouldy1411
Squinternotto
Squinternotto


Posts : 3
Join date : 2014-12-03

PostSubject: Re: g11 cold starting issue.   Wed Apr 22, 2015 3:01 am

Hi Pete, I was only looking through the service manual the other day regarding fuel system servicing. Buggered if I could find anything on TB cleaning - or stepper motor maintenance for that matter.
Is there a recommended klms interval for this? On the subject of the SM, is this supposed to hold the idle high while the engine warms up (and then gradually lower it like a car) - or just maintain the usual 1100 rpm while the bike warms up?
Does anyone think that 1100 rpm is a little high for these motors - has anyone attempted to lower the idle speed just a touch? Mine idles at approx 1100 rpm hot or cold.
Cheers, Gouldy
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Pete Roper
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GRiSO


Posts : 3767
Join date : 2013-05-29
Age : 59

PostSubject: Re: g11 cold starting issue.   Wed Apr 22, 2015 3:44 am

At,gag,gag-gag-GACK!!!

The target idle is a non-adjustable parameter programmed into the ECU. The idle speed should be around 1100-1150 for the pushrod motors and 1200-1250 for the Hi-Cam.

DO NOT TRY AND FUCK ABOUT WITH IT!

Cleaning the TB's is suggested every 10,000Km service but this is overkill unless you insist on trying to keep your oil at the 'Full' mark on the dipstick.

Pete

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matjazy
Squinternotto
Squinternotto


Posts : 4
Join date : 2016-08-29
Age : 33

PostSubject: Re: g11 cold starting issue.   Wed Sep 28, 2016 5:15 am

Guzzi Two Shoes, did you sort out the problem? I have simillar problems. My GRiSO 850 is having some problems with cold starts, i have to give it a little throttle until it worms up a bit...
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GuzziTwoShoes
Montanarolo
Montanarolo


Posts : 11
Join date : 2014-02-25
Age : 53

PostSubject: Re: g11 cold starting issue.   Wed Sep 28, 2016 12:02 pm

matjazy wrote:
Guzzi Two Shoes, did you sort out the problem? I have simillar problems. My GRiSO 850 is having some problems with cold starts, i have to give it a little throttle until it worms up a bit...
Hey matjazy, to my eternal shame, I didn't do anything about it!!
The bike seemed to "cure" it'self without be resorting to playing about with it. (I can see Mr Roper rolling his eyes at me!!)
I had a non start again today, even though I fitted the bypass kit from MPH Cycles in the US. I've ordered a new battery today in the hope that cures the problem.
The riding season here in England is coming to and end (For me anyway) in the near future when the local authorities start gritting the roads.
I will grow a pair, and use the downtime to thoroughly sort the bike out including cleaning the stepper motor in time for next Spring.
Good luck with yours, I hope you find a cure.
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PostSubject: Re: g11 cold starting issue.   Today at 8:35 pm

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