poor fuel mileage

[jeff332008]

hi all, i have an 09 flstf, put on samson pipes, K&N stage 1, and a new powercommander v, yesterday the bike stalled out and code p0107 came up, as well i am only getting about 20mpg in town. Any suggestions would be awesome, thanks

 

[Hoople]

When installing PowerCommander maybe knocked a wire off map sensor. Error code is indicating no current flow in map wiring. That would explain poor gas mileage.

 

[jeff332008]

do you mean the wires coming out of the powercommander itself?

 

[Hoople]

No. The error code you have says "Map sensor Open or Low". There are 3 wires that go to the map sensor. (+5 reference, ground, Map output to ecm) The ECM is not seeing a voltage from the map sensor. It most likely is seeing zero and it wants to see something from .25 volts to 4.75 volts.

I am thinking you may have a loose Map sensor (on throttle body) cable. It is an HD part & not part of PC. Of course it could be a bad Map sensor but since the bike is new and you added a PC I am thinking maybe a loose connection.

I better back up and ask because I am not familiar with PowerCommanders. The PC is just a piggy back fueler that goes to the fuel injectors only, correct. You don't in any way remove the Map sensor or drive the map signal into the PC correct?

I am thinking the map sensor is still intact & the way it came from factory.

 

[jeff332008]

the pc plugs right into the ecm and controls fuel and ignition

 

[NEWHD74FAN]

While you may have a problem, you might look into one of the more important aspects that control MPG...how the rider dirves his bike...certainly worth a read:

http://www.hdtimeline.com/fuel_and_carb_related_issues/24932-fuel_mileage.html

 

[Hoople]

I went to PC's web site to take a look. I see what you mean. I have no clue what the PowerCommander does with the map signal. I am sure someone that does will chime in.