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This is a thread in an attempt to curb all the double posting as well as provide a centralized solution for individuals to find what they need to do to correct the issue...

So you are riding your 4th Gen and feel a cylinder drop out while riding and your inline 4 now feels and sounds like you're riding a twin. This is happening irregardles of what you were doing and how long you have been riding. The problem seems to come and go, uncommanded.

What's wrong?
-There is an issue in the firmware versions that is causing one of the cylinders to drop off and basically stop functioning.

How to fix?
The only two verified ways to stop the issue, is upgrade your Dynojet firmware to either the 1.6.10 or 1.9.2 versions. If you have a Secondary Fuel Module (SFM) this will need to be updated as well.

Where can you get the firmware versions?

You can get the latest official release from Dynojet:
Powercommander Downloads

These versions are hosted separately. Testing results are in bold. (Updated 27JUL13)
1.6.10 --> https://dl.dropboxusercontent.com/u/11761730/PC5 Moto V0.1.6.10.zip Confirmed to work
1.9.0 --> https://dl.dropboxusercontent.com/u/11761730/PC5 Moto_V0.1.9.0.zip Issue still potentially exists with this version, use 1.9.2 instead!
1.9.2 --> https://dl.dropboxusercontent.com/u/11761730/PC5 Moto_V0.1.9.2.zip Confirmed to work
1.10.4 --> https://dl.dropboxusercontent.com/u/11761730/PC5Moto_v0.1.10.4.zip Untested as of 27JUL13
1.10.6 --> https://dl.dropboxusercontent.com/u/11761730/PC5Moto v0.1.10.6.pvu.zip Untestested as of 14JAN14
1.10.6.4 --> http://www.powercommander.com/downloads/Support-Released/PCV/Software/Install_Power_Commander_5_v1.0.6.4.zip

Has anyone tried out the firmware beyond 1.9.2? about to install the PCV in my gen4 with a few other mods that have been a long time coming and want to make sure which firmware to throw in. Thanks guys
 

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Got a new pcv from dynojet..after a few weeks problem came back again. Ditched the pcv and found a ecu on ebay with guhls flash..runs like a dream now with NO problems..
 

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Hello guys, new on the forum.

Bringing this issue up again.
Not sure if mine is the same, so maybe someone can point me in the right direction.

My bike runs fine at WOT, although as soon as I cruise on partial throttle between 3k rpm and 6k rpm, the bike starts to misfire or run lean or drops a cylinder. If I hold the throttle steady in 4th gear at say 5.5k rpm, it will start to decelerate and drops rpm, then suddenly come back to life.

I emailed PC tech and they suggested I upgrade to v0.1.10.6 which I did, although issue was still there.
It really makes the bike not fun to ride at all, and I am about to ditch the PC5 if I cannot resolve it.

Mods: Akra exhaust + PC5 + autotune

Any suggestions would really help.
I will try 1.6.10 and report back.
 

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Ditch the pcv and get your ecu flashed. Had no problems since.
 

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Update:

I removed the PC5 and the bike ran great.

Then I checked, and it appeared that the previous owner installed the wideband sensor instead of the OEM o2 sensor in the exhaust. So I decided to reinstall the PC5 without the autotune, and the bike ran just fine. Also, the USB port on the PC5 was damaged, to the previous owner leaving the cable plugged and the seat pushed against it, which damaged the USB port. I contacted Powercommander, they said it cannot be repaired, and I must send it in for evaluation either way. Shipping from Dubai to the US is $$.. So I went to a telephone repair shop, bought a USB mini port for 2$, opened the PC5, and replaced it myself. Now it is fully functional again :)

Although I still have the same issue, there is NO ROOM under the seat to leave the PC5 plugged in. Any tips?
 

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I would run a longer wire for the PC5 but from what I have read the PC5 really doesn't do much without the auto tuner . In 2013 I installed a PC5 in my bike at that time they didn't have a listing for me to click on so I had to find one that was close to the map I needed then had it dynoed. I had my bike stolen 2 months ago so now I have a 2016 . I have decided to buy a ecu and have it flashed then and a exhaust pipe. My only problem is which flash to choose . From what I understand the flash will do more for the bike then the PC5 can ever do so for me it's a no brainer.

Sent from my SPH-L900 using Tapatalk
 

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Gen4 riders..
I am looking for a PCV map which I can load as a B map, with the following.. top end power, rev limit 14500 and it would be great to have a map for MR12 or Sunoco Green E15. I have the basic mods done on my bike. . LeoVince Ti, increased compression and adjusted timing

I have autotuner and want to use it as a basis to work from. Would be using it for halfmile dices only. Assistance would be most valuable and appreciated.. either a map or a direction where to find one
 
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