Mine!!! #116 is ALL MINE!!!

[Garsdad]

I bought my first Guzzi, a beatiful little Tenni with only 768 miles on her when I picked her up on Thursday evening. As of today, we are a little over 1500 and adding up quickly.

 

I love her, but like most Guzzis there are a couple of things I need to address. One of which is the shift spring/boss thing, which I have already received much help on and will be checking this weekend. I don't want to wait and see if it breaks, as breaking anywhere but my driveway is most inconvenient...

 

The other issue is she pings. A lot. On premium.

 

Is the timing adjustable by humans, or is it handled by the ECU on this bike? Is this a symptom of the fuel injection being out of balance? It has what I think are stock Lafranconis on it, and the only modification I am aware of from her first owner was a set of Buell footpegs (highly recommend for the long-legged- very comfortable, and don't look out-of-place).

 

She is a little hard starting when cold, and the previous owner said the tip-over valve was sticking and she had tank suck, but when I would stop after 80-100 miles and open the cap, there was very little air getting sucked in.

 

I suspect the hard start and pinging are related, but I'm not sure. any help would be appreciated.

 

Thanks,

 

Garsdad

[Guest RACRX]

Congrates on ur Guzzi!!! My Rosso Mandello also has pinging under light load,, using premium fuel. I would also be interested to know what causes it and what the resolve is. Enjoy your new acquisition!!! CIAO

[Paul Minnaert]

I suppose your valves arew set american way, better go to euro specs with that. Further, I don't know how well adjusted everything is, that could make a difference too. I had a scura, same year, that didn't ping, and it never had. Find a dealer who cares, or a good tuuningcentre that has seen FI guzzi's before.

[Cliff]

Do a search on pinging on this forum there might be some references to it.

 

My advice is to turn the TPS a smidge ( not 2 smidges ) to increase the voltage- say 10-20mV.

This will have the effect of increasing fuel ( possibly to detriment of economy ) and reducing spark advance. Both of which will reduce tendency to ping.

 

If that doesn't mean anything to you, a quick search of this forum will give you the answers.

[Tom M]

Congrats on the new bike! Yes your timing is handled by the ECU. Mine pings too, in the midrange under heavy load with the highest octane gas I can get around here, and I have a custom Powercommander map that was done for the previous owner by a shop that's familiar with Guzzis. Runs great other than those occasional pings. I'll be real interested to hear what others have to say about the pinging...

[G.POLEGATO]

Hi Garsdad, I'm very glad for your Tenni, but, do you have signed up your bike in our Tenni Registry? Ciao Giovanni#60

[Ouiji Veck]

Pinging/ hard starting...

Relax your valves...

Loosen those babys up. Let 'em tick.

US Spec= what ...001/.002? (thats Ducati tolerance!..this ain't no Desmo)

World spec= .004/.006?

RaceCo= .008/.010...thats what I'm running. Starts on 2nd or 3rd tick over.

and on my last trip (700 odd miles) I was filling at unusual intervals so I tried toping

off with 89 oct. with it's usual diet of 91-93 for 2-3 fill ups. We were in the Mt. Rds of Vermont and I was whacking it open on uphill switchbacks @ 2500rpms in second gear and had narry a ping.

Guzzi proverb...."noisy valves are happy valves."

Good luck...have fun

[jtucker]

Guzzi proverb...."noisy valves are happy valves."

 

Actually, it's "tappy valves are happy valves."

[Guest RACRX]

I would suspect looser valves could sacrifice some top end power. Typicaly,, for every .001 of lash added,, 3 degrees of valve timing duration is lost. As in everything,, there are always trade off's i suppose.