so when i bought my car (94 gsr) from my friend he had put a aem or b&m fpr cause the guy that had it b4 him put a walboro 255 fuel pump which was unneccsary. ne ways i get alot of carbon build up at the exhaut tip and when i rev the engine hard i blow a lil black smoke so im running a tiny bit rich does any one think its worth adjusting the fpr? and if so how do i adjust it?
thanks

 

Loosen the locking nut, and turn the neck counter-clockwise to lower the pressure.