Backfiring, heavy decel popping, and intermittent stalling out after a long hiway run

 

PCIII with LCD modula runs great and cooler.

 

SE Pro Super Tuner is a great tuner. I have this + dyno tune & it made my bike run perfect....cooler, smoother, more responsive, leveled out my torque curve, etc.

I also hear great things about the TTS Mastertune...same principal as the SE pro tuner, but a little more user friendly from talking to others.

Most everything else, I either know someone who has issues or have read about various issues with.

This is not something to half-***....either get the SEPST or TTS Mastertune and find a good dyno guy and do it right this time.

 

I'd like to know your problem, I have a PCV retro for 1 1/2yr running canned map, no problem. However, I will do a dyno tuned after my cam swap.

 

theres nothing wrong with a power commander.
you need a new dyno tuner 3 tries and its not sorted out means he doesnt completely know what he's doing

 

TTS MasterTune, nice not having extra parts on the bike when done tuning and easy to use autotune. Same guys that use to make the S.E. Race Tuner for Harley.

 

I'm no expert but I'm having this same issue occasionally, and it's not related to my Power Commander. I keep reading it can be the Speed Sensor, or the Throttle Position Sensor, or the IAC valve that can cause the symptoms you describe.

Granted, if you experience those symptoms full-time, it's probably not what I mentioned. But if it's an occasional happening, you may want to start investigating the items I mentioned.

Also, there's a bulletin referenced in this thread (it's a .txt doc in post #19) that may help.

 

Assuming that your dyno guy does know what he's doing it should not take 3 tries. Are you sure you completely ruled out and intake and exhaust leaks?
I was having the same issues as you and after 3 sets of intake seals and new exhaust seals they were much improved. Installing the TMax cured what was left of those problems. I like the auto tune feature and the tune just gets better with time. No need to dyno, either.

 

Pretty much sums it up. If you tinker a lot with pipes or AC or other parts that would change performance a tuner that requires a dyno is not the best wat to go.

The TMax is simply a better way to go. I have been experimenting with my pipes and baffles and the TMax has never skipped a beat.

 

Theres no leak on the exhaust end, changed pipes about 2 months ago and there's fresh gaskets in there and everything is buttoned up tight.

The intake side is worth a look.

The bike isn't running lean or rich, I pulled my plugs and they look fine.

The problems I experience are intermittent, sometimes it backfires after heavy acceleration, and sometimes after a long highway run (let's say 20-30 miles running at 70 or so) when I get off my exit and stop at a light or stop sign I'll have to blip the throttle at idle or the bike will cut off...