2003 Twin cam counter balanced
pretty much stock has screaming eagle heads breather kit
really hard to start after a few days sitting in the Garage, any ideas ?
Have vacuum tested the fuel tap won't hold a vacuum but still flows plenty of fuel, would of thought the diaphragm should hold a vacuum seems to be in need of replacing.
 how to test the map sensor on the inlet manifold? removed from the manifold and on the bench.
Test 1
connect a battery to the two outside pins of the 3 pin plug allowing no more than 5volts to enter the circuit, using a vacuum gun with a gauge apply a vacuum to the MAP sensor inlet fitting.
I would expect the voltage to drop as the vacuum is increased, isn't that how its supposed to work.
Test 2
get rid of the battery and substitute resistance test I would expect the resistance to increase as the vacuum is increased.
any body know if this is this the correct way to test these.
any advise on hard to start would greatly appreciated, Had the battery tested that's fine.

The correct way is to apply 5v.
I have bench tested them before, and from memory at atmospheric pressure, you should see around 4v.
At idle ( high vacuum) you will see around 1v.

http://www.cvel.clemson.edu/auto/AuE835_Projects_2013/Sohane_project.html

Hi Guys
Thanks for the reply's
All connections look good and pass the wobble and pull test
would of thought the Map sensor was faulty if there was no change in resistance or current when a vacuum was applied
however at 5v with no vacuum I believe the timing should be set to TDC for initial start by the electronic module and with no change in current the bike should run poorly when warm.
Not happening the bike is a pig to start after a couple of days not running
probably gonna have to plug a scanalyser in during start to see whats happening electronically $$$$
oh for the simplicity of points.