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Map sensor Iwas in search of technical data on the process of trouble shooting an electrical problem on my 2002 fxst specifically the map sensor the bike will start and run fine for afew blocks then die like it runs out of gas we have don your typical geuss work replaced the petcock l checked the internals of the carb verified gas flow but it still dies out like a fuel starvation problem

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  • Anonymous Feb 08, 2009

    i have a 02 fxsti that acts the same way at times. it will run fine for days then it cuts out for 6 or 8 times then runs again. i checked tank and put new fuel line on. what else

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Posted on Feb 28, 2010

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I have 2001 Fat Boy 90000 miles My check engin light comes on when i get up to 75 80 mph Be for I take it in to H.D. shop is their any thing I cac check?

Posted on Oct 13, 2008

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Hi,

Have not worked on an HD but my thoughts and additional guesses would be:
1. fuel contamination (water at bottom of tank);
2. primary pump (in my case it was inside the fuel tank & might not be present in your bike);
3. fuel lines & clamps to & from primary pump or to the carbs;
4. in line filters;
5. vacuum controlled fuel valve (oppose to the usual manual petcock)
6. if it were the MAP sensor, bike wouldn't even run a block away + idling would be rough;
7. by chance are you using a Power Commander?

Also your post "bike will start and run fine for a few blocks then die" indicates that indeed fuel got into the carbs before but not when running meaning the bike used what was inside the bowl and was not replenished.  Alternately, the fuel flow to the carbs might not be sufficient and there is a leak or a blockage somewhere.

As said might not work for your bike but has come across some of the above on numerous occasions.

Good luck and Kind regards.

Ride Safe.

Posted on Oct 23, 2007

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Scanner plugged into OBD-II data link connector.
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6182d26.jpg

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fc565b1.jpg

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