Anyone Have A Problem With Pc 2

Hi All, I recently purchased a 99 red ( BTW There is a pic in the gallery) and have been thoroughly enjoying it until yesterday when it started to cut out abruptly at lower mid RPM's. I asked for some help on this and a couple of the guys on VFRD made some helpful suggestions starting with taking the pc 2 mod out of the equation. Thanks Fixxer. Taking the power commander out seems to have helped... This brings me to my next question which is do I need a Power Commander? Am I going to miss some enhanced performance without it? I have read that everybody likes Cozye's map can this map be loaded on a PC2 ? Also what is with the high, mid, low buttons on the pc2?? BTW the bike is modified with a micron slip on and a K&N Filter. Any info much appreciated. Fred

I'll explain how the PCII works
The PCII installs inbetween the outputs of all the sensors and the inputs of the ECU, it takes the data coming from the signals, manipulates it, and "tricks" the ECU into altering the fuel map.

As to why you need it.
Modern FI bikes come from the factory with very restrictive air boxes, filters and exhausts to meet EPA regulations. Since your bike has been altered with a more free flowing exhaust and air filter, the engine is getting more air than the ECU is "mapped" for. Thus with the PCII you can alter the map and take full advantage of the additional air that is flowing through your engine.

An alternative method is this.
With more air, the bike is running lean. To richen up the fuel mixture, you can simply install or modify your FPR (fuel pressure regulator) from stock pressure of 36psi to somewhere in the neighborhood of 40psi. This will increase the fuel delivery all across the rev range the same. It doesn't allow the same level of tuning as the PC, but is much simpler with similar results.

Side note.
The PCIII alters the signal coming from the ECU and going to the injectors and coils. This is a more direct method of adjustment, not relying on any "tricking" of the ECU.

Before tossing the PCII, I'd try loading a new map and see if you still have the low-rpm problems. If not, then the map that was in there must have gotten corrupted. If the problems still exist, then I think your power commander is shot.

Do you need a power commander? No, but I guarantee better throttle response, fuel economy, and performance if you get it properly tuned. It was like night and day on my bike -- completely smoothed out the power curve and picked up 5 horsepower in the process. The low/mid/high buttons are for manual tuning of the fuel map (w/o altering the tables by hand), but without metering the air/fuel curve and power output, it will be hard to tune it properly.

My recommendation is, if the PCII does indeed work, load a map close to your bike's setup and see how it feels. If you are happy with it, then just have fun and ride (IMG:http://www.vfrdiscussion.com/forum/style_emoticons/oldemoticons/491.gif) You can always get it running better if you take it to a local tuning center and have them work up a custom map for you. If you don't want to be bothered with anything and think your bike runs fine without the power commander, just leave it unhooked.

Just my 2¢

toro1, Apr 27 2007, 10:15 PMBefore tossing the PCII, I'd try loading a new map and see if you still have the low-rpm problems. If not, then the map that was in there must have gotten corrupted. If the problems still exist, then I think your power commander is shot.

Do you need a power commander? No, but I guarantee better throttle response, fuel economy, and performance if you get it properly tuned. It was like night and day on my bike -- completely smoothed out the power curve and picked up 5 horsepower in the process. The low/mid/high buttons are for manual tuning of the fuel map (w/o altering the tables by hand), but without metering the air/fuel curve and power output, it will be hard to tune it properly.

My recommendation is, if the PCII does indeed work, load a map close to your bike's setup and see how it feels. If you are happy with it, then just have fun and ride (IMG:http://www.vfrdiscussion.com/forum/style_emoticons/oldemoticons/491.gif) You can always get it running better if you take it to a local tuning center and have them work up a custom map for you. If you don't want to be bothered with anything and think your bike runs fine without the power commander, just leave it unhooked.

Just my 2¢

Thanks for the help guys