ok i am sorry to keep posting questions when i dont even have a tweecer yet, i am really planning to get one SOON. but have been reading on them so i am not totally lost. on my car i put a bigger SC lower pulley on and increased the output of the blower i have and while i was at it i replaced my stock 19lb injectors with 42s, i also ditched the FMU and put in a pro-m 75 mm MAF(shiny one) with the 42lb "blower" calibration. the car runs way too rich (as expected.) it was blowing black smoke out the tailpipes when i put a load on it and when i pressed the clutch in it would die when the rpms fell down. the 42s were working on their own ( no FMU) and provided enough fuel even under 8 psi to blow black smoke out the pipes, just to give you an idea of how rich it runs ( this could be partly due to the "blower" mass air sensor) i tinkered around manually with my idle and FP. adjusted the FP to about 35 psi or so. seemed to like it ok. i also jacked up the idle to about 1000 rpm. the car NOW will start pretty good, i dont have to feather the gas to keep it running on a cold start ( probably the overabundance of fuel causing this) and the car wont die when i press the clutch in approacing a stop. if i happen to kill it on accident it alot of times will flood out like a carbed car and its hard to start it again. the car is also getting horrid gas mileage. the car has also lost some power. it runs fast still but doesnt quite have the "edge" to it like it did. i can tell there is some hidden power in a tune. to my question finally. will changing basic parameters and scalars telling the EEC what i have done so far cure some of my fuel problems. i dont have a tweecer yet but it seems i can go in, tell the EEC i have 42lbers, set a good MAF transfer and set the injector high/low/breakpoint and all the other small/basic changes and this would get the AFR alot better where it should be (without getting in depths and messing with injector timing and pulse width) am i correct in my thinking??? also with this 42lber "blower calibrated" sensor what am i going to do there? can i just set my own transfer or use a regular pro-m 42 lber table??? or should i send the sensor in for rewiring?? a little insight there would also be great. thanks for any help!