Heidhurtin

.020 Over
Joined
Feb 25, 2025
Messages
50
Location
Abu Dhabi
Ride
2012 Rocket III Roadster
Guys - genuine question, be gentle. 2012 Roadster. I'm trying to sort a "firing on 2" issue, and it's the first time I've had to remove the side cover. Imagine my surprise to find this....

So, given I have Jardines fitted but OEM intakes, what good is the Power Commander V? I'm a noob at the tuning thing but does this negate any maps I flash using TuneECU? I'm not chasing any power gains but would like the bike to run a little richer (cooler).
Any pointers to explanations in plain english would be appreciated.....

. 20260222_123236.jpg
 
I just bought one myself with this settup. Ive never run either but have seen them (pcv auto tune) fail. The auto tune seems to try to get fuel right but struggles compared to what i normally do and thats dyno tune. I will be deleting auto tune next week as we hit the dyno to dial in. Youre firing on 2 issue could be the coil getting hot and failing, if hot has nothing to do with it a plug wire could be jumping arc, the spade connectors could be loose, tighten with pliers, and check plugs. Autotune and pcv may not be your issue like i said i think auto tune trys to keep fueling right not necessarily causing misfire, mine back fires alot right now but its 250hp and a very angry engine. Others will chime in and sort you out.
 
Thanks Kevin. I didn't think the PCV was responsible for the missing cyl, I was just curious as to what good it does on an unmodified (Jardines) bike? It's an expensive addition, and unless there's more going on in this bike than I know, a bit of a waste. I've had the plugs out and it is running a little rich, which is what I want, and I've no idea how to use/modify or even remove PCV.

Now, onto the misfire, which is REALLY odd.
 
Thanks Atomsplitter, there's a manual for setting up the unit specific to the Rocket, but the PCV's already installed on the bike. My question is, now that I know the PCV is there, changing the map using Tuneecu would be pointless (and a lot of wasted effort already), correct? I also don't see the benefit in the PCV for my particular bike.
 
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