Posted this in the Touring forum too...

Hey guys. Looking for a power commander map for a setup pretty close to my buddy's bike. He's got a 98 Road King EFI evo, has a S&S 510 put in it, and got a list of BS from his dyno guy a mile long, not to mention his bike sitting in the shop for the past 4 months. He's "tuned" right now but the SOB won't idle cold, stumbles on brisk throttle, but pulls fine up top. We've saved his tune he's got on there to see if maybe that's it, but need a tune pretty close to what he "needs." Specs for the 510 is 238/252, 99* ICL, Intake open/close 20°/38°, exhaust open/close 52°/20°. Any help would be great!

His dyno tuner has gotten a bad rep locally because of this and other people he's screwing out of money. His bike ran better stock than it did with the work he's got done. he's got duals with hooker tune flows on it too.

 

did you look up there web site , they have a huge section on maps , or fuelmoto.com look them up & call them there the best in PC

 

Not if you didn't buy from fuelmoto originally. Why would they give their assistance for a product that they didn't sell?

 

Going to assume you have a PC3 USB, Evo maps are targeted towards basic air filter and exhaust changes so canned maps are limited, map 801-009 is the only map that mentions a cam change which is a stage 2 cam and probaly the SE3 Screamin Eagle. You can try this map but canned maps are only close and the M&M can't adjust fully with no O2 sensors in it's system, the 801-009 might be enough to get it on the road and out of being held ransom but EFI's need to be set up with a air to fuel ratio reading system.

The cold idle problem is probaly the base M&M EFI acting up, during the cold start up the ECM is locked and not reading off the map in the ECM, it is reading off the engine temperature sensor and releases the ECM to start reading a map after a certain engine temperature. It is very possible that the engine temperature sensor is acting up and it is the base sensor that controls fuel delivery of a map, could be the reason why the tuner is struggling with the tune, it would well be worth $75 for a sensor if the tuner hasn't already put it in but if cold idle issues are present I doubt if he has.

The stepper motor is also failure prone for the cold idle issues and easily checked but it is also base controled by the ECM which is reading the engine temperature sensor. The stepper motor will move out and come back in to it's commanded posistion on a cold ignition on and will slowly back off at startup while reading the ETS and engine gettin hotter

It sucks having to depend on others anyway but a dyno guy that is making a living with more of a locked fee for dyno tuning will funnel in a money maker ahead of a problem child or a loser as it is called in the mechanical repair world. Get the bike out of there at a no charge or parts only and try to find another dyno tuner, you might try the map suggested to see what happens but need to watch the stepper motor cold or a ETS install to cure the cold idle problem as the ETS is the heart and can lean it out cold or flood the engine when it is hot and cause inconsistancies in a tune

I believe M&M tuning problems are becoming more common as time passes, understanding the early EFI is a lost art and why carb conversion have become popular.

 

I have a 98 ultra classic and had the same issue and it was down to the ETS. just like to say well done to 1997bagger, great break down of the early EFI system....

 

Y'all are awesome. I'll be letting him know this and see if we can get parts on the way!