Quote from taylorteamracing on February 24, 2020, 3:31 pm

looking at you afr you appear to be lean more than rich your target is 14 and you appear to be fluctuating between 12.5 and 17 but mostly you are at 13.8 to 17 the higher the afr the leaner and lower the richest I would do a plug test run it in drive at 3000 rpm shut the key off then remove foot from accelerator coast to a stop and pull a plug from each side of the motor, are you at the correct cam setting for your engine vacuum did you check for air leaks in the complete intake system, is the vacuum connected correctly to throttle body or bodies, did you swap to the delco temp sensor, are you running a fuel return ...

Quote from bdhulderman on February 24, 2020, 6:27 pm

If you don't have an airtight seal with you O2 sensor and your exhaust, it will be pig rich and your AFR will read good or even lean.  Check you plugs for sure.  If they are black, then you have an O2 leak.

Quote from mrcrowly on February 27, 2020, 7:36 pm

Thanks for the heads up.... i am fighting vacum leaks at the moment as it was the first place to look. Dont really have to much on specs for motor other then it was built with a 144 roots blower and it has a small blower cam with world products sportsman 2 heads and is a blast to run 🙂 Not going to run blower for now till other things get dialed in again as its just been a switch from carb to EFI

Quote from taylorteamracing on February 27, 2020, 9:15 pm

well you will half to start from scratch again when you put the blower back on,, blowers dramatically change the atmospheric properties on how the motor runs, iac, cts o2s,tps,map will be WAY different when you reinstall the blower , my advice put the blower on, when the system was ordered obviously they ordered it for the supercharger so the base tune in the fitech is for a supercharged application make sure the fitech is set up for the supercharger with the vacuum port on the throttle body, if you are running a small block cheby set your distributor locked 36 degrees make sure you have a 180 stat let the fitech run the fans and the fuel pump hook up a 3 step retard and only use the 15 degree retard for start for now get your iac steps to at least below 15 set your target idle 1000 / 1100 set afr 13.0.0 you need to be on the rich side to compensate for the massive amount of air being pushed in and start tuning to get it where you want it and let the system fine tune itself just my 2 cents but you will not be happy when you put the blower back on and everything is out of adjustment

Quote from mrcrowly on March 11, 2020, 6:28 pm

Have everything back in order after changing back to carb. and fixing voltage issues. did change plugs again and went with a hotter plug and switched back to the fitech and all is good. so not real clear on the issue but starts and runs smooth but still have to get some miles on it from here