i jus got done with a cam,injector,tb swap and went to 7730 ecm im now lean i had a chip by ed wright done for me for eveything i swap but i also put my stock chip in and its also lean but i would think with #30 svo injectors id be rich with stock chip my scan tool shows me in low 400mv range my o2 gauge shows lean when i go for a ride i can hear a miss from time to time at cruize and if i step on it it wants to stumble then take off
ive check my tps set it at .60 and it good ive check for intake leaks couldnt find any when i give it gas while cruizeing itll barely go from red to yellow on my o2 gauge but if im really that lean why is the computer not giving me a lean code? i put new map on and it reads fine
im really lean at idle could it be my iac? i put new holley 52mm tb on and clean iac before installing it i need help its getting nice out and i wanna go drive lol any help is greatly appecated
im running cc305 cam holley 52mm tb 30# svo red top injectors 383 stroker afr 195cc headslt1 intake 7730 ecm i hope you guys can help me out again your all great thanks

 

Are you running headers? If so you may need to put in a heated O2 sensor if you have not already done so. This may be better to read than a non heated version. Obviously a wide band is optimal if you know someone with one or can afford to buy one. I would suggest learning to tune your own chips. The chip people can work with you to get close but no one can tune your car perfectly without having it in person. Also are you getting knock?

 

Are you going into closed loop (learn mode = on)? What are your block learns and integrator values? Only in closed loop will the ECM shoot for 450Mv, otherwise it's just an interesting number on a computer screen.

How's your fuel pressure? If it's low you will be running lean despite the bigger injectors.

Are you SURE you have 30# injectors in there??? My brother was SURE he had 30# injectors until we ran the numbers on the side and found out they were only 24# (oops). It would take a billion years for his ECM to throw a code despite injectors that were 30% oo lean. Don't wait on the Check Engine light- it's nothing that will get you to the bottom of this problem.