I'm using a Power Vision. I have lots of logs, but none while the engine is cold. I'll start a log tomorrow as soon as I start it up.

What should I look for in the log?

 

I bet you anything you need to add some fuel to your warmup enrichment table. If this is only happening when cold anyway. If this is happening when warm as well then look at your spark and KPA then look at your AFR and Spark tables. Make SMALL changes nothing very large especially in spark. Pulling even 1 degree of timing can make big differences. For AFR/Lambda make changes in the .010s ranges Ex. going from .959 to like .939 to make it a little fatter. I would 1st try adding .010 or so to your warmup enrichment table in the heat ranges you are experiencing the issue. If you got the PV from FuelMoto then you can send the MAP and LOG to them and Jamie will look and make the needed adjustments for you.

If you do make the change on your own dont count on getting it right the 1st time. Tuning is an art and has a steep learning curve. Once you master it though you can really start taking full advantage of your PV.

 

Yup...too lean.
My 97 I just turn the mixture screw on the carb....or keep the choke on until it warms up.

With the newer FI............pay someone?

 

Only happens cold, like below 150* from the PV datalog screen. I didn't buy from Fuel Moto, so they won't help me. I'm planning on having it dyno'd, but not for a few weeks. I ride to work everyday, so if there's something I can tweak in the map to get me through, that would be awesome.

I'll run a log while it's cold and compare the KPA.

The new map DJ sent me for the cam upgrade has a richer warmup enrichment across the range. It's .043 richer than my previous map from 90* through 320*.

Then they updated my AFR last week because I was running really hot at low speeds and idle by adding fuel in the 30-50 KPA below 2000 rpm (from 14.3 to 14.0). That helped bring the temp down, but now I wonder if that coupled with the warm up enrichment might be causing a problem.

Argh...might have to part with $300 sooner than I planned.

 

If they made the afr fatter in below 2000 in 30-50 kpa then you def need to look at warmup enrichment, I run about 30kpa when cold not sure how yours will look. It may be getting too much fuel now on warmup. Do you get a rich smell when it coughs? Try pulling .010 from the warmup from say 90* to 176*.

 

I've had a rich smell of gas since the new map all the time at idle, cough or not. Maybe that's the problem.

 

Sounds like they have the map running really fat to fuel the cams. Try leaning it out a bit in the warmup table. After that you can start looking at the AFR table. Sounds like they added a bunch of fuel to lower operating temps but may have added too much. What temp are you running at when cruising? Sorry and by pull I mean add .010. Increasing the # leans out the AFR. Decreasing will Richen it.

 

240-260* on the freeway, outside temps 65-80*.

So I just decreased the warmup enrichment by .010 (subtracted) in the ranges you recommended.

I'll give that a go first, then try decreasing fuel in the AFR table where they added it.

Thanks for the help.

 

NP. You can also look at the quick tune stuff. May want to do your changes there so you dont have to screw with the tables too much. You can lean it out across the board there as well as decel and all that jazz. Also remember. Lowering that # in the table will increase fuel and adding to it will lean it out. Its reverse from what you think. Think of it as adding and subtracting air not fuel.

 

I had the problem of my 03 fxdx sneezing or coughing out the carb, and dying when I hammered it. I removed the carb blew out all the jets and passage ways put it back together. I did this probably 6 times, and was about to give up. Until I rembered I had the same problem on my 78 ct70, the gas cap wasn't venting. Had a Roland sands cap on the fxdx the check valve in the cap was stuck closed. Got rid of the valve and runs great, I was about to throw in the towel. I hope this helps I chased it for a month or two lol.😠