Griso - wet misfire, again.

[Trogladyte]

My issues were fuel related due to water and my symptoms were a bit different than Trogs. I am pretty sure Trogs are ignition related.
But here is links to my threads.
https://wildguzzi.com/forum/index.php?topic=101479.msg1604955#msg1604955

https://wildguzzi.com/forum/index.php?topic=101652.msg1607709#msg1607709

Thanks.

I will read them with interest.

I assume my problem is HT related, but I also doubt that diagnosis, as there's not much on the HT side that I haven't replaced. So I naturally start thinking about fuel.

And all is still well with the Griso - although I haven't had monsoon conditions to deal with yet. It's only a matter of time.

In other news, I am making progress with combating some ageing issues. I have replaced the corroded pillion footpeg hangers, with some 2nd hand ones I found cheap on Ebay, I've also replaced the corroded oil cooler housing, and my new knuckle joint and front brake pistons have arrived. I should be ready in time for winter...

[Trogladyte]

I still have problems and am now at a loss.

Original issue:

Right side misfire when wet.
Happens when the bike is washed or after a bit of heavy rain
Runs on one until there is a very large throttle opening, when it kicks onto two.

What I did: replaced plugs, plug caps (NGK), HT leads and r/h coil. Swapped out injectors for a pair known to be good. Took the connectors on injectors off  cleaned up contacts. Cleaned all the other contacts I could find.

What it's doing now:

Runs fine until it gets really wet. Then, it won't idle on two cylinders - cuts intermittently between one and two cylinders. But as soon as i give it even a small amount of throttle, it runs fine. When it dries out it returns to idling fine.

I'm mystified. I'm inclined to think this is an injector wiring issue. I think it has got better - whereas it used to need loads of throttle to run on two, it now just needs a hint of throttle. I am imagining a poor connection to something needed to fire the injector, that fails when wet,, but as soon as it gets a bit more voltage, the poor connection is overcome.

Does that make sense? Where could this connection be? ECU perhaps?

For the sake of my sanity, I need to get to the bottom of this. I am relying on the dear old Griso for transport at the moment, as I have recently had a break in to my garage, and my KTM Superduke 1290 R and my son's Triumph 675 Daytona race bike were stolen.

[beetle]

I would pull the ECU and check the pins. Just to be sure.


Sorry to hear about the KTM & Triumph. Arse!  London must be the bike thievery capital of the world. 

[tazio]

Holy crap! When it rains it pours! (Absolutely no pun intended)
Lousy Thieves!

[Trogladyte]

Holy crap! When it rains it pours! (Absolutely no pun intended)
Lousy Thieves!

Bike thieves are the scum of the earth. We were gutted to lose the race bike, as it wasn't insured, and lots of love (and money) had gone into it. The KTM was recovered as it had a GPS tracker. It's repairable - steering lock chiselled - but I haven't got it back yet. They cut the chain securing the Griso to a ground anchor, but didn't take it - I suppose they only had room in the van fr two bikes, and they chose the Daytona, probably because it didn't have a steering lock.

[Motormike]

How did they get into the garage?  Side door or did they somehow open the garage door itself?