I’ve been having issues with my Breva over the last 2 months and have been trying to resolve myself based on info from many of the posts and technical docs around. I have now exhausted my list and thought I’d share my ‘work’ to date and see if anyone can advise on my next steps please?
It’s a 2005 Breva 750ie that I bought in June 2020, it has 22k and is standard except for a pair of Mistral’s (baffles in place).
First off - lumpy running and big hesitation.
Replaced plugs to start, then noted water in filler (assumed in tank too) so as week two, booked in for service and check over.
Tank was drained
New filter (metal)
Throttle bodies balanced
Came back just fine
6 weeks later, refuses to start after a 20 mile run out. Luckily when warm and dry. After 45 minutes of trying every 5 mins or so, took off seat. wiggled all the relays, fuel pump connector etc. It started. Was it me? I don’t know, just started for a laugh as the RAC arrived as it woke up!!!
Got it home, checked All connections, cleaned up spades on the injector relay (they needed it). Saw no signs of any issue that could have caused it?? Starting to loose a bit of faith now.
Hesitation starts again. Similar, if not the same as before. Start a list of checks.
Air Filter - replaced (it was pretty dirty) No change
Checked plugs - Engine definitely running Lean
Replaced Lamba Sensor - no change (now realise this wasn’t necessary)
Checked tank again - syphoned out and found signs of water again!
Tank off - noted both vent pipes loose. Out with Fuel, filter and pump out.
Totally drained Tank - New filter _ again! in case
Vents cleared (overflow was partially blocked so explained water ingress, tank vent pipe was pinched in pipe so hoping that was it) and then blown through
Cap vent checked too
Checked HT leads
Tank back on (has anyone else experienced the lengthening tank palaver?)
New fuel, no leaks, test run and…same again, no change
So, now looking at GuzziDiag and Lonelec
No error codes or anything I could see of concern
TPS reset and throttle learning set up.
Contacted Beetle (Mark) who kindly sent me a basic map for no-pop and Lambda Off.
Mapped this, TPS reset, throttle learning
Ran better than it has been…but still ‘missing’, not regular but easier to hear around 3-4k revs, and feel when riding…
Last ride just now after Beetle got back to me with a variation for Temp with our UK climate.
Remapped, reset TPS etc … and no change.
I have now run out of my ‘very’ limited knowledge of where to go next. If anyone has any thoughts or options, no matter how small, that would be very much appreciated. Feel free to point out the obvious too as this has been just Me Vs Breva until now, and I think I know who’s winning.
They say a problem shared is a problem two people now have!