I already used the known good A2A with the same bad results. It is possible that both sensors were bad? PossibleBad sensor or wrong sensor as Mustang5L5 said above in post #21 - needs to be the A2A version of the Crown Vic MAFs, not the OPs AA version.
I'm a C&L guy and have had no issues with both 73 and 76mm units running 19s and 24s. Just a tube change.
Thank you