2001 F4i fuel pump primes it builds pressure in the rail but the injectors will not fire at all I have spark confirmed.

 

Cleaned injectors they now fire but that puts me in a more awkward position now bike has spark, and the injectors fire, fuel pump primes I’m running out of things to check I already checked and replaced all my fuses and my battery goes on a tender nightly what else am I missing ?

 

Do you have pressure on the rail, have you tested the FPR.

 

I have tested the fuel pressure I have enough to fire injectors and they work now, now I’m confused as to why the bike won’t start with spark and fuel and the FPR doesn’t leak at all.

 

Fuel pressure has nothing to do with firing injectors, that's ECU's role.

What's actual pressure in psi you measured in fuel-rail when cranking?



Also measure how much each injector is flowing in cc/min. Pull fuel-rail with injectors attached. Place little cups under each one. Crank engine for 10-secs. How many cc did you collect in each cup? Are they all matching amounts?


There is a number somewhere, some place, that's off and incorrect. But you have no idea where problem is because you haven't measured and tested to come up with numbers.

EFI systems are not binary, on/off, yes/no. They are finely-calibrate systems and must have proper numbers in order to operate. You have yet to post single measured test number, so of course bike doesn't run.