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JOHN aka Eauto
JOHN aka Eauto, The Car Guy
Category: Chevy
Satisfied Customers: 16302
Experience:  ase tech
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Ok and merry christmas. heres my problem i have an o4

Customer Question

ok hello and merry christmas . heres my problem i have an o4 silverado with the 5.3 i installed an 07 or newr intake manifold with the flex fuel injectors and new bigger 87 mm thorttle body . it works but now i have the check engine light on with po172 and po174 codes . running to rich . so if i install my old stock fuel injectors from the stock intake will that fix the too rich prolem
Submitted: 1 year ago.
Category: Chevy
Expert:  JOHN aka Eauto replied 1 year ago.

one bank is rich and one is lean according to the codes?

Customer: replied 1 year ago.
well they both read rich
Customer: replied 1 year ago.
the codes are po172 and 175
Expert:  JOHN aka Eauto replied 1 year ago.

ok you posted 174 which is lean.. are you running a stock tune?

Customer: replied 1 year ago.
Expert:  JOHN aka Eauto replied 1 year ago.

either you will need to go stock injectors or have it tuned... If you have a performance shop hat can tune or a tuner that can write a tune is the other option