I have been lurking on this forum for a while …. would like to chime in on this topic. I have been doing research and am currently getting ready to tackle this issue on my ride.
Definitely open your cam chest ASAP and seriously consider “biting the bullet” now with some type of cam tensioner upgrade or replacement kit. All the info I read says that 20k to 30k is the critical point on the cam tensioner pads, but wear can happen much earlier – like say…. 16k..
. If your tensioner pads are OK upon inspection and you opt not to upgrade at this point – check OP with mechanical gauge then inspect all your electrical connections and wiring on the OP gauge circuit thoroughly.
I have 27,500 miles on my 2006 Road Glide EFI (Stage 1 kit – everything else stock) and been having a similar issue – my oil gauge gets “pinned” at start-up and fluctuates randomly from there. Bike runs like crap when hot on occasion. Rough idle and stalls intermittently.
First, I tested OP with a mechanical gauge...
With the mechanical gauge attached to the sender switch threads, OP readings were within spec – then, I changed the sender switch – that did not work – same issue.
Now I’m thinking the cam tensioners are about to grenade and the cam plate take a dump or, it may be an electrical issue inside the faring. I never inspected cam chest yet. Last oil change the filter was “clean” – no orange plastic stuff.
That was last year. I moved, other personal stuff and riding a lot of dual sport bikes had the RG on the back burner……
I am currently overhauling the RG since I have a few big trips planned for this year. I chose to upgrade to the S&S 509C cams and chest kit. Since I am about to reach the critical 30k mark and the issue at hand, I felt the full upgrade was best. I like the fact that the new type of oil pump is included with the kit as well as the modern cam tensioners. Also on the list is a new Cycle Electric 50amp kit and the ebay Dual LED Headlight Assembly from China.
You recently got the bike back from service……. Was the fairing removed?
I do not want to bash dealers in my first post on this forum since I have good relationships with several dealers in my area and more than a few dealers have saved my ass on long distance trips over the years. But, a few times I have gotten my bikes back from service with “new issues”. My most recent dealer service (25k service), among other things, the headlights were wayyy out of adjustment and the faring was loose when I got the bike back. A loose or damaged wire somewhere in the faring OPG circuit is not out of the realm of possibility. So – when I get to upgrading the headlights and have the fairing off – I will check to see if any “new issues” developed with the OP gauge wiring during the last trip to the dealer.
I am pretty sure the root of my issue lies in the cam chest, but I will check the entire OPG circuit again when I have the fairing off.
If your tensioner pads are OK – and you still get the crazy readings – don’t forget to check the wiring and gauge inside the fairing.