docc 1,662 Report post Posted March 9, 2018 So many V11 were shipped with the CO Fuel Trim set very, very lean (settings of minus 25 or much more have been reported). Do not skip this step! Zero (or optimize) the CO Fuel Trim on your V11! It can be done with guzzidiag, the original Moto Guzzi "Axone," VDSTS Pro software, or Meinolf's method through the EEPROM (which I do not understand). (Using a "PCIII" to accomplish this is considered rather *less than ideal* at this juncture.) Perhaps we can get the EPROM method clarified here . . . Quote Share this post Link to post Share on other sites
emry 27 Report post Posted March 9, 2018 I bought a MyECU because of this, the other tools were not as prevalent back then. Stalling at stop lights made the original ECU useless during commuting. 1 Quote Share this post Link to post Share on other sites
docc 1,662 Report post Posted March 9, 2018 I'm embarrassed to say that it took me eight years, like 31,000 miles, to get my CO zeroed. Andy York took care of it for me. These days, we have guzzidiag to get it right. Do not neglect your CO Fuel Trim! Meinolf has another method that he says is easier. Perhaps we can get that clarified here . . . Quote Share this post Link to post Share on other sites
fotoguzzi 112 Report post Posted March 9, 2018 When I had a Lemans and a Bassa that was the main fix! and after the fix I scoffed at the Power Commander as a fix.. it really made my bikes superb, smooth idle and crisp pickup off the line.. I used the old VDST .. had to partition my Mac to have a windows XP OS just for that. 1 Quote Share this post Link to post Share on other sites
Meinolf 84 Report post Posted March 9, 2018 Hi, ...or Meinolf's method through the EPROM (which I do not understand). Perhaps we can get the EPROM method clarified here . . . it's easy. Instead of changing the CO trim with GuzziDiag connected to the running engine and waiting until the engine temperature has reached 60°C, download the EEPROM content using Beard's software http://www.von-der-salierburg.de/download/GuzziDiag/IAW15xEEPROMTool_V0.04.zip. Then open the EEPROM file with TunerPro and this XDF http://www.von-der-salierburg.de/download/GuzziDiag/xdf/15M_EEPROM_V1.01.zip. Change the CO trim and upload the changed file to the EEPROM. Donate some money to Beard using the PayPal link in GuzziDiag and it's done. Cheers Meinolf 3 Quote Share this post Link to post Share on other sites
Mike Stewart 7 Report post Posted October 31, 2018 So I have a question on the CO trim, I had downloaded the titanium map to my 03 Rosso and just noticed that the CO trim was at -15. Does that mean that the CO trim was in the map I downloaded or is it another part of the computer that stays no matter what map you have? Quote Share this post Link to post Share on other sites
Mike Stewart 7 Report post Posted October 31, 2018 I think I found the answer, it is in the EEPROM! 2 Quote Share this post Link to post Share on other sites
al_roethlisberger 80 Report post Posted November 24, 2018 What are the running symptoms of the CO being set too low? The problem I've had with the bike since new was a "cough" at around 3-4k RPM once warmed up and cruising. Sometimes moving the cruising RPM around will stop it for a bit, but it returns. Quote Share this post Link to post Share on other sites
docc 1,662 Report post Posted November 24, 2018 Yep, very low CO trim will contribute to that. Along with the rest of the "Decent Tune-up." 1 Quote Share this post Link to post Share on other sites
fubar guzzi 3 Report post Posted April 22 Please explain what eepron is +how to set it up as mentioned byMeinolf.What type hardware do I need? 98EV Quote Share this post Link to post Share on other sites
antmanbee 35 Report post Posted April 22 They are referring to a 15M ECU. You have a P8 ECU and the CO is set by inserting a small screwdriver in a hole in your ECU and adjusting richer or leaner. Quote Share this post Link to post Share on other sites
fubar guzzi 3 Report post Posted April 22 Thank you Mr. Antman---I have a small screwdriver,know where the hole is,however I don't know when to stop turning the screw!!!!!!!!!!!! Please advise. Quote Share this post Link to post Share on other sites
LowRyter 267 Report post Posted April 22 My 98 EV has a little knob to richen it. If I set in the Colorado it will backfire in Oklahoma. Quote Share this post Link to post Share on other sites
fubar guzzi 3 Report post Posted April 23 Good mornin Mr.LowRider,thank you for your immensely informative posting of co adjustment,now it will be a snap to adjust correctly.On a 2nd note please share with us what brand BOURBON you drink-----I have an inquiring mind!!!!! Quote Share this post Link to post Share on other sites
LowRyter 267 Report post Posted April 23 Must've been scotch. Look for the "knob". Quote Share this post Link to post Share on other sites
