code 0171 what did i miss

Question

i changed the spark plugs. tested the injectors with an ohm meter (and they all read 13) changed all of the vacuum lines with new ones, a new plenum gasket and i still get the 0171 code. i know i must be missing something i just dont know what. could one of the injectors still be bad even though it reads within spec with the meter. i cant do the stethoscope test because those injectors are under the plenum. any help would be greatly appreciated. thank you for your time.

                            robert

Answer 1

P0171 Fuel trim lean Bank 1

If there was a bad injector not only would you code a lean condition but a misfire code and a injector code. The use of brake cleaner or carburaotr cleaner would be useful in this case, and spray at suspected area there would be a noticeable change in the RPM, what highly suspected area is the EGR system such as the EGR tube gasket. Here a IAC (Idle air control ) coded with a lean Bank 1, the fault here was the EGR tube gasket,