Simple RESISTENCE test fuel injector Toyota Corolla √ Fix it Angel

9 years ago
22

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Testing all 4 injectors. 2003 Toyota Corolla, 4 cylinder engine 1ZZ-FE, also applies to 2003-2008 Corolla's.

Check engine light on prior to testing. 3 DTC codes
Freeze Frame stored first code as follows.

Fuel Injectors https://amzn.to/2Vxzl2y
https://tinyurl.com/y4a2qmtk

P0171 Lean Condition: When the air-fuel ratio feedback is stable after engine warming up, the fuel trim is considerably in error on the rich side (2 trip detection logic)

Possible trouble areas:
-PCV hose
-Air induction system
-Injector blockage
-Mass air flow meter
-Engine control temperature sensor
-Fuel pressure
-Gas leakage on exhaust system
-Open or short in heated oxygen sensor circuit
-Heated oxygen sensor
-ECM

P0303 #3 Cylinder Misfire
P0304 #4 Cylinder Misfire

It was determined that #4 fuel injector was bad because of blockage. Later I will load video on how I confirmed the injector was the problem and replaced the injector.

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