I am using a Sfmu with 32# accel injectors. I am using the stock fuel pump with a msd inline. I cannpt get this car too lean out at idle at all. I have the idle fuel pressure set at 18 psi, and it still idles between 12.5-12.8 afr. I am using the biggest disk and dark spring in the sfmu....Any suggestions???

Thanks in advance

Sounds like a stuck open injector if the pressure is 18 and your still pig rich.

i had a similar issue, the afr was way rich and all over the place when crusing gear to gear. it was the filter in the m/l. check to se if its dirty, wet, or missing. btw, nothing else works like the filters that come with it so anything else will cause issues like this too.