I had a natter with friend who is a retired vehicle electrical engineer (JLR), he advised with intermittent faults like this, ie those that occur when the bikes warm and the fact Guzzi have stated in the manual that its “trouble prone” V23073 electrical relays can be replaced with newer versions suggests some one is giving me / you a pointer in problem solving this issue ! He suggested to me I take the “hint” and go from there !
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Sounds a fair idea Paul, I’ll revert to standard to begin with (baseline) and then see how that goes, if it needs fresh relays then that should be straightforward - do you know if they fit the same base?
Thanks,
Jeff
Hi Paul, been spending some time getting to grips with part numbers, out-of-stock relays all over the place, costs for stock parts from, er, ‘the larger distributors’, and I’ve come up with the OE part being superseded (but also OOS in various places) however the Tyco/TE/Siemens part seems to be available for much less here: Micro Relay 5-pin, Changeover, 12v 20A, With Resistor - Car Automotive Auto micro relay make and break car van bike boat
Ultimately, it’s a 12v 20A 5 pin electromechanical relay which is used not just in the automotive industry.
Thought you’d like to know.
Cheers,
Jeff
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hi Jeff - same issues - out of stock in my searches and those that are available are second hand - pulled them out though and sent them to my Brother, who’s a manager in the electronics departments laboratory at Imperial college - the OE relays I have are ok -but the plating on the connectors is on the way out …He suggested a good clean of all the contacts and keep working through all the parts in the fuel injection system each time it happens - time consuming though and could be costly.
The recomended go to for Guzzi relay replacements is Pyro Dan in America, he will happily send to England and I am told the postage is reckoned to be reasonable.
Have a look at his website
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Well, time is something I do have - had an attempted theft on Monday, thankfully just a ‘checking out the security’, however it’s left me feeling very apprehensive about keeping the bikes at the house, so looking at alternative secure locations. With that in mind I’ll be taking care to go through each and every connecter on the wiring harness, clean, then dielectric grease/sealant and go from there.
Bike thieves unprintable…
The sun shone Friday afternoon so got the tools out and sorted out the fuel filter and replaced the checked relays - few photos - the guide / forum on how to sort it helped loads - there’s not a lot of wriggle room but I found offering the end of the filter towards the opposite cylinder head and then twising through 90 degs does the trick - the same with the filter clip - the pattern part has a different format to its internal layout - but when back on the bike the fuel flowed as expected - i took off the rear connector on the floor as it woulnt budge on the bike - you need a 22 /19 mm spanner and a hammer if its been on a while , I reckon this Webber item is the original filter
Did it cure the fault?? - NOOOOH ! - the bike idles lovely abut wont take any throttle whatsoever - at least its here permanently now and not intermittent - the relays open the circuits to the fuel pump and ECU - so to have an idle they must be operating correctly to open the circuit as desired .. so - where to next ?
Hello Paul, yes that filter is exactly the wrong size for the slot isn’t it!
Interesting that having done what I have (replaced filter and pump) you’re still having issues; it’ll start but won’t take load, precisely what happened to mine.
My friend is restarting his bike repair/service business imminently and I’ll be taking the bike there for storage, for security if not convenience, at which point I’ll be reverting all earths/positive feeds to stock, install a new battery, which it needs anyway, then inspect/clean/dielectric spray each connector and give it a trial.
If the engine won’t pick up under load I’m thinking that it ‘sees’ the starting fuel requirement, as it will start no problem and tickover, but won’t deliver the progressively larger delivery to the injectors as demand requires, so then it’d be throttle position sensor (only one on the LH throttle body apparently), or maybe ECU or some other sensor.
Should be making some progress on this in the next couple of weeks.