ok...i was riding today to work,and about after 15 miles, my bike started to sputter...so when i let off the throttle i heard a pop sound from the exhaust., and i let the thottle off all the way, the idle got down to less then 500rpms and died...
turn it on, and i had to keep the rpms high to no let the bike stall...
i installed an o2 sensor, wich i don't think that it my be the problem...
i'm thinking about the fuel pressure regulator...
what do you guys think??

 

and i get normal gas milleage-45-50 miles a gallon...

 

06 f4i -25k miles

 

i'd guess either FPR or the MAP sensor. any weird annunciations/flashes from the FI light?

 

no... the FI didn't blink even once...that's why i'm confused...everything worked fine, good gas mileage...and boom-out of nowhere...

 

just check battery connections to make sure...

 

no, the baterry is good...
thank's any way...

 

Have you checked for any codes? there is a jumper harness under the seat, just jump the wires and turn on the key

and count the number of flashes.

 

check the spark plugs. i had some of the same symptoms. it would make a weird sound, idle real low and die. new plugs fixed it.

 

i will try the plugs also, 'cause i don't think that they where changed recently...let me try that..thanks