V7-II map upgrade.

[Kev m]

Yep I get that (regional differences).  Fair enough.

And yes I understand a V7 is not a BV500.  I only mentioned that bike in particular b/c the manual would suggest a higher octane than what actually works.  My *personal* theory is that something gets lost in translation in those manuals and specs, but I have no actual grounds for that theory...it's more of a 'I've been dealing with Piaggio products long enough to suspect...' type of thing.

As for the tech's qualifications, I'd *hope* they're good as he's our direct line to Piaggio tech. 

I don't think anything is lost in translation when you convert octane ratings. That's like saying something is lost in translation when you convert 20C to 68F. That's just not the case.

As for the TECH, he's a TECH, like me, we're NOT ENGINEERS. I don't for a second think a regional tech generally knows better than the guy who designed it.

Now I DO admit the possibility that the guy who designed it for whatever reason was not allowed to say what he really thought the recommendation SHOULD BE. But we'll probably never know that for sure.

I'm just going with the OEM recs COUPLED with my personal experience suggest it's not black and white that you always CAN use a lower octane. Though it wouldn't surprise me at all if you could sometimes.

 

[pyoungbl]

Maybe it's just because I'm frugal (Guzzi content) but I put the cheap stuff in my V7 and in the Stelvio.  I've never had an issue with pinging under load.  Both bikes run just fine.

Peter Y.

[Clancy]

OK, looks like map 4533V796 has actually fixed the worst of the issues created by map 4533V795.

With map 4533V795 the idle was higher & frantic making the bike buzzy.
Idle is now back down and lazier.

The horrible lurch & stall after a short cool down period is gone.
I tested this with periods of 1 - 8 hrs, was nervous it would stall every time, but it never did.

First thing in the morning (0-5 DegC) are still a bit dodgy.
I have had a couple of stalls.
These stalls have not happened immediately upon taking off.
As I said to Pete, if you are able to get rolling and go for 50m or so without slowing down then the bike keeps running fine.
But if you have to slow down for something before then, like the end of your driveway or a speed bump, then it seems to drop into 'shit' mode as you slow down, then lurch & stall as you try to go back on the gas.

Overall I'd say the bike was almost back to where it was before the initial re-mapping.
As the wife & kids are away all next week, I should be able to get some decent riding in after work.
If anything changes in the way it runs - either way - I'll let you know.

[Clancy]

The morning after I'd posted this, I tried a procedure that Pete had passed on as something to try when we were dealing with the shitty 4533V795 map.

It's simply start the engine from stone cold WITHOUT TOUCHING THE THROTTLE and allow the bike to slowly warm up to full operating temperature (15-20min), DO NOT rev it or touch the throttle at all during this time. Then turn it off and let the bike cool down completely.
This apparantly performs a full 'Cold to Hot' idle trim.

To be honest, he was a bit dubious about it but hey, it was what he'd been told to do and we had to try something.
Anyway, after I done this the first time it appeared to me to have smoothed out the running at lower revs when cold, so I thought it was worth a try again.
(It did not get rid of the horrid lurch & stall problem).

So on Saturday morning I pulled the main fuse for a minute & replaced, then did as described above.
After going through the process the bike has started and run first thing in the morning for the last 3 days WITHOUT ANY burp, fart, lurch or stall. None at all!

Now granted, the past few mornings have been a bit warmer than earlier in the week (8~10 DegC), and maybe someone wiser will say it's rubbish, but I can only report what I've done and found.
I had a ball on the bike over the weekend, not one foul word or embarrassing moment.

[Vasco DG]

Excellent! Danielwasnt talking out of his arse!

Pete

[Kev m]

Really??? Pete recommended idling the bike for 15-20 minuteso allow it to self adjust trim, really???

I don't think I'd make it past minute 5.

[Vasco DG]

Yup, that's what I was instructed to try so I did, and it worked it seems!

The Nuovo smallblock engine has bags of finning and it is only idling, it's not going to be producing masses of heat. I'm still at a bit of a loss as to why it works but as long as it does? Who cares?

Pete

[Kev m]

Hmmm, maybe I should pull the fuse for a bit, then install and try it. My V7 with the latest map is still showing some cold bloodedness. Really 15-20 minutes eh? Don't touch the throttle.

[Vasco DG]

Ambient temp obviously plays a part but it has to get as hot as hades! Have you got Guzzidiag up and running? Just wait until the ET stabilises, job done.

I have to say I just uploaded the latest map for air cooled alt. bikes into a Racer this morning. It was a cold blooded shitter. Now completely fixed. Are you sure they upgraded the map?

Pete

[Kev m]

As sure as I can be without looking over their shoulder and not having hooked up GuzziDiag.

I'll give GuzziDiag another try. I ordered a new set of cables from a different recommended source in case that was the problem. I'll also make sure I have the current version.

The new map seemed to make difference the first cold start, maybe even the second. But it's like the adaptive learn trimmed it back to something that's surging again and it staked up the street in the last ride.

Maybe it's time to visually inspect the throttle plate and MAP sensor tube. Make sure they're clean. I know not to use solvent on the tube.

[tonUPRacer]

Hmmm, maybe I should pull the fuse for a bit, then install and try it. My V7 with the latest map is still showing some cold bloodedness. Really 15-20 minutes eh? Don't touch the throttle.

I've not had any such issues with my map upgrade. I've put about 500 miles on since the upgrade. I didn't mind the 2 minute warm-up before, but I must admit it's nice to be able to just start and ride off. We are on the tail end of riding here in WI, I doubt I'll have any hot/humid conditions for comparison until next season!

[sib]

.....I'll give GuzziDiag another try. I ordered a new set of cables from a different recommended source in case that was the problem. I'll also make sure I have the current version.....

If you're using a Mac, don't forget to install the USB driver from the Guzzigdiag web site (I forgot).  Otherwise nogo, Guzzidiag will keep telling you the ignition is off.