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ENGINE DRIVEABILITY AND EMISSIONS 6E–241 10 Check items that can cause the engine to run rich. — Verify repair Go to Step 11 11 Monitor “B1S1 (Bank 1 Sensor 1) Status” on the Tech — Go to Step 12 Go to Step 13 12 Check items that can cause the engine to run lean. — Verify repair Go to Step 13 13 1. Visually/physically inspect for the following conditions: • Restriction of air intake system. Check for a restricted air filter element, or foreign objects • Check for objects blocking the IAC passage or throttle bore, excessive deposits in the throttle • Check for a condition that causes a large vacuum leak, such as an incorrectly installed or Was a problem found? — Verify repair Go to Step 14 14 Check the injector connectors, if any of the injectors — Verify repair Go to Step 15 15 Perform the Injector Coil/Balance Test. — Verify repair Go to Step 16 16 1. Check for fuel in the pressure regulator vacuum hose. 2. If fuel is present, replace the fuel pressure regulator assembly. Was a problem found? — Verify repair Go to Step 17 17 Check for proper ignition voltage output with the spark — Verify repair Go to Step 18 18 1. Remove the spark plugs and check for gas or oil fouling cracks, wear, improper gap, burned 2. If spark plugs are fouled, the cause of fouling must be determined before replacing the spark plugs. Was a problem found? — Verify repair Go to Step 19 Step Action Value(s) Yes No |