Help - F4i Running Rich

backendoforever · 06-12-2007, 11:12 PM

ok so i bought my 02 600 f4i a month ago. i just replaced the plugs, and i have a erion exhaust on it. it runs good, but its running too rich. it flutters and pops when i rev it over 5000 rpms. a local dealer told me i need a power commander, but it seems to me a problem like this would have been taken care of by the previous owner. can anyone think of anything else it could be?
help!

Triax · 06-15-2007, 11:44 AM

It's fuel injected and the air to fuel ratio is off so you need to drop $300 on a power commander and have it remapped. Thats all you can do bro besides deal with it.

*sinfuldragon* · 06-15-2007, 11:53 AM

If its the full exhaust system then yep you need that PCIII. previous owner may not have cared about the popping

backendoforever · 06-20-2007, 9:58 PM

its only a slip on though, i was thinking of maybe puting a k&n air filter on it to open it up a lil more, do you think that would help?

trtlpmp · 06-20-2007, 11:31 PM

You'll still need the power commander. The ECM controls how much fuel to send to the cyclinders. So either a mod was done to affect that, or the ECM is bad. Either scenario, you should get the power commander.

dondi · 06-24-2007, 12:20 AM

Correct me if I'm wrong (most likely) but I was under the impression that most stock bikes FI is set up on the lean side to help pass emissions tests.

It seems that a slipon would only result in an even more lean situation.