oh the fun....not

[tpricez71]

ok guys.HELP!!! i did a pressure regulator change. checked codes everything great. i did the engine seafoam thing. now i have engine setting 3 codes... PO171,PO172,and PO327. please help me, im going nuts.

 

[Danny_Z56]

*PO171 system too lean

*P0172 System too rich (bank 1)

*PO327 Sensor 1 low input (Knock sensor)

 

[tpricez71]

ok... but where do i start looking for these causes