PC3 Usb & O2 Eliminator Install Causing Fi Light Variances

I am stumped.. I've read a lot on the PCIII USB process and resulting issues, but I haven't found anything clear on a solution for mine. ..Looking for some help.



I installed a used but good condition, PCIII USB on my clean '03 VTec. I also did the 330ohm, 1/2watt resistors in the male ends (harness-side) of the O2 sensor wires. I checked to make sure they are in the correct 2, of the 4, pin connections.



After installation, I got the FI light #24 error.. (Faulty 3/4 (2nd) O2 sensor heater). I ensured the O2 elim resistors were "resisting" the right amount with my voltmeter and compared to one of the DynoJet eliminators that I bought for a good deal on ebay. Everything looks right, and I used the dynojet eliminator to make sure the connection stayed good.



Then, I did an ECU reset to clear the codes, using the service pin "jumper" method, but the codes still remain.



I've fiddled around with the eliminators since then to eliminate all possible positions and variables, and I plugged into the PCIII to make sure it had an active working map, running.



..Still can't get rid of the code or issues. It's running a little rich and slightly off (35mpg's and not as smooth as I expected with the Cozye or PC map). Also the code went from 24 to 23 (Faulty 1/2 (1st) O2 sensor heater), and sometimes the FI light just stays solid for a bit.



Any recommendations on what to check next?



FYI notes

-good battery

-VFRness recall performed already

-two brother's stash can exhaust

-left the O2 sensors in and tucked the cables

-only 8k miles and barely used bike

 

Why was the used PC for sale in the first place?

 

Did you try to put the bike back to original set up to see if the Error go away?
When I install my the FI light turn on but after load the map and run the engine the light went away.
Good luck and perhaps paid the $20 for the o2 eliminator connector and hope they work.

 

Local guy got a new KTM and was parting out all his well cared for add-ons.

 

Scubalong - I didn't think the issue is with the eliminators, but I will try and plug the O2 sensors back in to see if that clears the code. If that doesn't do it, I'll try unplugging the PC. Will update.

 

Good luck and keep us posted.

 

I plugged the O2 sensors back in, which eliminated the error. I guess I'll buy one more DynoJet eliminator to see if it was the "Radioshack" resistor that was not working properly.

 

That probably will fix the problem. Good luck mate.

 

Problem fixed! I used the one Dynojet O2 eliminator and I tried a tip from someone else. Twisted two 330 ohm resistors together (in parallel) and inserted those to the pins of the other O2 sensor male end. Because of the beefier diameter of the new resistor wire's end, the contact was better. This was my issue, in the first place.

No more FI light error, and the performance is what I would have expected from the worthwhile PCIII upgrade. It feels great!!! Bike runs smoother, stronger, cooler, and more efficiently.