Basicguy3
Standard Bore
- Joined
- May 16, 2026
- Messages
- 1
- Ride
- 2006 Rocket Classic
I'm really scratching my head on this one, I feel like I already tried everything.
I threw the TTS Stage 1 supercharger on my 06 Rocket Classic maybe 3 months ago and had it dyno tuned at a shop. It worked great for a while, maybe 10-20 rides. Maybe a running a little on the rich side, but I told the tuner to guy to give it a safe tune. On a bit of a more spirited ride I noticed a bit of dead spot appear somewhere around 50-60% throttle above 4k rpm and my amazon wideband gauge confirmed I was running lean. The problem seemed to worsen and affect lower rpm's/throttle % until I pulled off and let the bike cool down for a bit. The problem went away for the rest of the ride until I was nearly home when any touch of the throttle seemed to push my afr's past 16. I let the bike cool down and it ran fine for the short test ride after. Since then it's worsened to the point that I can't touch the throttle or it'll lean out and stall.
My initial thought was that the fuel pump was going out or TPS was giving incorrect readings which seems to have been ruled out. Second thought was that the injectors were giving out at high duty cycles which they seem to work fine on a bench test and i still have the problem after a cold start.
Things I've tried:
- Install inline fuel pressure guage - appears to hold 42psi even when the bike leans out
- install new primary TPS & recalibrate iscv - seems to give a more consistent reading
- redneck injector flow test (run fuel pump apply power to the injectors and spray into water bottles) - all injectors appear to have a decent spray pattern and seemed to fill the bottles at a similar rate
- increase the fueling at low rpms/throttle% up about 15% - didn't seem to change much still leaned out/ran rough with throttle input.
Possibly related things/thoughts:
- I was having issues last year with the iscv and unplugged it then and set the idle with the set screw. (so no ISCV right now except for using it to do the ISCV reset) not sure if it was necessary
- fuel pressure guage is from oreilly's so it could be a cheapo? - seems like I wouldn't have 42psi if it didn't work.
- inline guage tee restricts fuel flow a bit. I had a chance to ride the bike with the gauge before the problem really set in and it seemed to work fine.
- AFR guage giving incorrect readings? - it's a cheap amazon one, but it seems to reflect how the bike runs/idles pretty well.
- The tune switches over from MAP sensor based to throttle % based at 2% throttle. - seemed to work before, also seems to rule out vaccuum leaks?
- Blowoff valve stuck? - doesn't seem like it would affect higher rpms when i'm on the throttle
Does anyone see any holes in this? My only thought at this point is possibly a bad ECU. I do have TuneEcu to try things out.
I threw the TTS Stage 1 supercharger on my 06 Rocket Classic maybe 3 months ago and had it dyno tuned at a shop. It worked great for a while, maybe 10-20 rides. Maybe a running a little on the rich side, but I told the tuner to guy to give it a safe tune. On a bit of a more spirited ride I noticed a bit of dead spot appear somewhere around 50-60% throttle above 4k rpm and my amazon wideband gauge confirmed I was running lean. The problem seemed to worsen and affect lower rpm's/throttle % until I pulled off and let the bike cool down for a bit. The problem went away for the rest of the ride until I was nearly home when any touch of the throttle seemed to push my afr's past 16. I let the bike cool down and it ran fine for the short test ride after. Since then it's worsened to the point that I can't touch the throttle or it'll lean out and stall.
My initial thought was that the fuel pump was going out or TPS was giving incorrect readings which seems to have been ruled out. Second thought was that the injectors were giving out at high duty cycles which they seem to work fine on a bench test and i still have the problem after a cold start.
Things I've tried:
- Install inline fuel pressure guage - appears to hold 42psi even when the bike leans out
- install new primary TPS & recalibrate iscv - seems to give a more consistent reading
- redneck injector flow test (run fuel pump apply power to the injectors and spray into water bottles) - all injectors appear to have a decent spray pattern and seemed to fill the bottles at a similar rate
- increase the fueling at low rpms/throttle% up about 15% - didn't seem to change much still leaned out/ran rough with throttle input.
Possibly related things/thoughts:
- I was having issues last year with the iscv and unplugged it then and set the idle with the set screw. (so no ISCV right now except for using it to do the ISCV reset) not sure if it was necessary
- fuel pressure guage is from oreilly's so it could be a cheapo? - seems like I wouldn't have 42psi if it didn't work.
- inline guage tee restricts fuel flow a bit. I had a chance to ride the bike with the gauge before the problem really set in and it seemed to work fine.
- AFR guage giving incorrect readings? - it's a cheap amazon one, but it seems to reflect how the bike runs/idles pretty well.
- The tune switches over from MAP sensor based to throttle % based at 2% throttle. - seemed to work before, also seems to rule out vaccuum leaks?
- Blowoff valve stuck? - doesn't seem like it would affect higher rpms when i'm on the throttle
Does anyone see any holes in this? My only thought at this point is possibly a bad ECU. I do have TuneEcu to try things out.
