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Griso revving 1200+ rpm

G

Griso Guy

Cruisin' Guzzisti
Joined
Feb 11, 2009
Messages
157
Location
PA for now
If bringing the Griso form 5200 feet down to 400 above sea level. Could the throttle setting be set for the higher altitude therefore allowing the engine to run at a bit higher in RPM's?
As you know I have removed all the trash, such as the carbon canister, the main air box / battery tray and now with a new aftermarket slip-on.

Could altitude have this effect on the engine?

Thank you once again.

Doug
 
The EFI system should be compensating for altitude. That is supposed to be a benefit of fuel injection. You do have thicker air at lower altitude but it shouldn't cause the RPM to increase. Try restricting the airflow to the stepper motor. There is an extensive thread on the subject in this forum.

Also check to see if both air bypass screws are open, only one should be. see https://www.guzzitech.com/MGGriso/Manual ... iceMan.pdf For the EFI tuning procedure. If you do attempt to change anything, you will need access to VDSTS or an Axone.
 
What John said, and likely your bike is in need of a quick reset with the VDST or Axone.
 
I have known that the O2 sensor should send adjustment info to the comp. But you never know with Italian engineering. I had put some slack in the pull cable hoping that might due the trick.

Thank you again.

Doug
 
If a new Guzzi is idling a little high (mine is, after 500 miles or so of break-in), can't a guy just turn back the screw on the throttle stop?

I see the locking paint on the part and a few others. Is monkeying with this a no-no? Everything has to be done via computer?

Joe
 
bsanut wrote:
If a new Guzzi is idling a little high (mine is, after 500 miles or so of break-in), can't a guy just turn back the screw on the throttle stop?

I see the locking paint on the part and a few others. Is monkeying with this a no-no? Everything has to be done via computer?

Joe
Click to expand...

Absolutely not. Do not adjust the throttle stop--better known as the Sacred Screw. It is factory set and will alter your ability to accurately tune the bike. It will also void your warranty.

Idle is controlled by the ECU. In order to get your idle back to normal, you will need reset the TPS (Throttle Position Sensor). This is typically done with VDSTS software for the average Joe (Available from Todd Eagan-RacerX on this forum) or an Axone which is what the dealer uses.

For a detailed explanation of how to tune your bike, see this article by GrahamNZ: https://www.guzzitech.com/index.php?option=com_kunena&Itemid=2&func=view&catid=44&id=6819#9000
 
Does anyone know what the procedure is for removing the charcoal canister?
Don-M
 
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