2003 Sport Trac P1074 persistent code

[Tom Angelucci]

Hi All new to forum and engine thread. 2003, XLS with 210k miles. Pesky code has me and my mechanic chasing our tails. Initial code was lean bank 1. All lines checked good, no vac leaks, maf good. Upstream o2 sensors replaced, smoke tested for vac leaks all good but code came right back. Now get lean bank 1 and sometimes bank 2? Gettng 'occasional' long cold crank, found low fuel pressure way lower than 65psi, so may replace fuel pump next. Also occasional slight warm engine miss. Are we missing anything,? want to cover basics before big injector job. Thanks.

 

[Tom Angelucci]

Hi All new to forum and engine thread. 2003, XLS with 210k miles. Pesky code has me and my mechanic chasing our tails. Initial code was lean bank 1. All lines checked good, no vac leaks, maf good. Upstream o2 sensors replaced, smoke tested for vac leaks all good but code came right back. Now get lean bank 1 and sometimes bank 2? Gettng 'occasional' long cold crank, found low fuel pressure way lower than 65psi, so may replace fuel pump next. Also occasional slight warm engine miss. Are we missing anything,? want to cover basics before big injector job. Thanks.

Update: Most recent second code was P0171 in addtn to orig P0174.