Damn 18 to 1 is kind of radical
Sorry to here that you've had so much problems with the systems. Ive had mine for 5yrs and it runs flawless! My car does run lean also but its cause I never
tuned it
my A/F is at 14:7:1 When i spray the Custom nossle 100shot my system cuts off in 3rd gear? but works fine with the 70-80 shot all thru the 1/4mile
and Ive added a new fuel pump!
Maybe you should have your module checked? something is definetly causing it to shut down.
Also check thy wires going to the O2 sensors and your O2s, could have a bad one?