Cobra FI2000 settings

[tkd]

Ok guys, calling for a little interpretation here. As I explore more and more of my Nomad, I keep finding things that make me go "hmm".

Mine is an 07 1600 with V&H baggers and stock intake, no mods. WHen I got the bike, the FI 2000 was already installed. Below are the pot settings. I'm curious if they sound about right to any who might either have the same set up or who have more knowledge. I've read the instruction sheet, but don't want to go messing with things that may not need messing with.

First pot......about 3
Second pot.....about 6
Third pot.....about 6 or just barely past it.

These are reading from left to right.

The bike seems to run fine, but my mileage does seem to be low (31ish) and sometimes I get a little backfire when upshifting while letting off the throttle.

Any thoughts as to these settings?

Thanks

[Blue Rebel]

Hey tkd,

I'm no expert, but I have played around with mine.

I'm currently at 1.2-4.5-0

I have been told the 3rd pot should be turned off, or at zero. Not sure exactly why, but I think Caddmann can explain it better.

When I originally installed mine, it was set at 3-5-0, which Cobra explained was the correct setting, but the instructions made comment that for the Nomad the Fi2000r had to be adjusted.

I had alot of backfire. I had the V&H with the cobra. I have since added the caddmann kit and made the adjustments to the processor and have eliminated the backfire. It runs and sounds really sweet, but my mpg's are 33~35.

To try and improve the mpg, I'm thinking on trying to shut the processor down and see what happens with just the open intake and the V&H.

[pablo]

I have tried all kinds of settings on the Fi 2000 and am back to around 3.5.0. I have Cobra true dual exhaust and no intake modifications other than a K&N filter. I also have a 1.5K ohm resistor on the air temp sensor. I get a little over 30 mpg most of the time, but the bike runs great.

[rewindgy]

Didja marble it? Settings now 1.5 - 3.5 - 0 K & N filter / V & H's front pipes - Supertrapp SE slip-on's. Just finished a 2000 mile tour of Western States ( it friggin snowed & rained!!!) appears to been from low of 40 MPG to a high of 47 MPG - travel speed of 70 - 80 MPH. The low mileage was bucking quite a wind from Great Falls to Shelby Montana. You need to turn off the third pot! It is only used if you modify the motor for full on power ( ie: full throttle Drag Racing) other wise if you rev the thing up to shift you are just dumping extra fuel into the motor that you are not needing. Bottom pot sets how much extra fuel you want at lower throttle settings to eliminate surge and dead spots - middle pot sets the duration the of the addition of fuel ( or so I interpret the specs). Supposedly the Nomad does not lack fuel in the middle of the throttle range - only very lean at the bottom. Someone else with more technical knowledge should chime in!

[VulcanE]

Can't help with the Cobra FI2000 settings, as I run the TFI, but on your backfiring, since you have aftermarket pipes, you need to block off your reed valves. You can do this a couple of ways, replace them with "coasters" (that's what I did, and it gets rid of some extra weight, and cleans up the look of the engine) or you could just block them off. That's what they mean by "marbling". All you do is take off the right air cover, and at about the 2:00 o'clock position, there is a rubber hose coming into the cover housing from the back side. Get a marble, or anything else, that you can put into the tube to stop it up. This will disable the reed valves, and stop all the popping and/or back firing.

[vulcanero03]

mine is a 2003 1500 with about 76,000 miles on it, i ended up with pot settings at 2---5---0 i understand that the pot # 3 is only for high rpm, so we never run above 5000 anyway, so i left it at o my nomad runs sweet with the current setting. and my mileage remains around 39--42 regardless of terrain and or speed, that includes a few runs of around 100 miles/hour sustained. go figure, some people get low 30's and some people high 40's mine never gave me more than 42 and that's hovering at steady 65 miles/hour and shifting early, low on the rpm's. my recomendation, check the spark plugs, the ceramic insulator should be a tan color, that indicates a proper air to fuel mixture.

[tkd]

Thanks to All for the input.

I left the first pot @ 3 and moved the second pot down slightly to a little above 5. I did turn the 3rd pot to zero. When I rode the bike, the backfiring seemed to have stopped, but the bike did not seem to have the same roll-on throttle response above 60 as it did. Strange as it seems, it also seemed quieter, which I doubt would change with the pots.

I'll let y'all know how it turns out.

[wayne]

I have a 2004 1500fi side slash Cobra pipes, Cobra Fi2000, after playing with mine I found the lower the settings the better the mpg. I'm set now at 1.25, 3, 0 Best mileage 39 mpg fully packed and 2 up. Riding alone 30-32mpg

[jlamz]

I have an 07 with Cobra true duals. I had the FI2000 set to the recommended 3-5-0 and had the bike run on the dyno at the local dealer. To my surprise, the bike was running rich and the settings ended up at 0-0-0 (which is the ECU settings). I feel that I wasted my money. BTW, I tried a K&N filer on the right side and the bike still runs rich. Apparently all that cool air on the right side, just causes the ecu to enrichen the fuel mixture.

[tkd]

I'm beginning to think I'm running rich. This make absolutely no sense, but since setting the pots to 3-5-0, I seem to smell more exhaust than I did before. I'm beginning to think I"m imagining these symptoms. THinking of backing off the first pot a little more.

[jlamz]

I had my bike run on the dyno because I was smelling fuel and I noticed a black exhaust when accelerating.

[tkd]

I too smell fuel on occasion when at idle......thinking this might mean the first pot needs to back off some?

Anyone?

[VulcanE]

Originally Posted by tkd

I too smell fuel on occasion when at idle......thinking this might mean the first pot needs to back off some?

Anyone?

I would think so. One way to tell is to ride for about 50 miles at a steady pace, pull over, and take a light colored cloth and wipe down the back of a saddlebag and see if you have a lot of soot. If so, then your probably running rich.

This is the main reason I went with the TFI. On the TFI, your first pod is divided in two. The first pod adjusts fuel mixture for idle and cruising, the second adjusts mixture for roll-on of the throttle (they say it automatically adjusts for varying loads on the bike), the 3rd pod is for modifications to the inside of the engine (usually set on off), and the 4th sets the RPM that will dump maximum fuel when you roll on the throttle.

[jlamz]

Does the TFI allow you to reduce the amount of fuel or is it like the Cobra and you can only add? Does the TFI plug in like the Cobra?

[mako]

I have an 06 with the same setup. The original owner had the bike tuned with the Cobra and the settings were 2.5/4/0 and I was getting about 40MPG but a lot of popping. I switched to the base setting 3/5/0 and it reduced the popping but seemed to lose some kick so I'm back to how it was, still average about 40MPG