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1997 Ford Escort L4-122 2.0L SOHC - Engine - MIL ON/Misfire DTCS P0300-P0304

- DRIVEABILITY - ROUGH IDLE, LOW POWER AND/OR STALL AT IDLE WITH DIAGNOSTIC TROUBLE CODES (DTCS) P0300-P0304 STORED IN MEMORY - VEHICLES EQUIPPED WITH 2.0L SPI ENGINE ONLY

- ELECTRICAL - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0300-P0304 STORED IN MEMORY - VEHICLES EQUIPPED WITH 2.0L SPI ENGINE ONLY

FORD: 1997-2002 ESCORT, 2000-2002 FOCUS

MERCURY: 1997-1999 TRACER

ISSUE

Some vehicles equipped with the 2.0L SPI engine may exhibit a malfunction indicator lamp (MIL) illuminated and diagnostic trouble codes (DTCs) P0300 through P0304 stored in memory. The vehicle may also have a rough idle or reduced power condition, and/or may stall at an idle. This may be caused by sticking exhaust valves due to excessive carbon build-up.

ACTION

Check for faulty fuel injectors and ignition wires. One or more exhaust valves may be temporarily sticking due to carbon build-up between the valve stem and guide. If the diagnostic checks point to a sticking exhaust valve, the cylinder head assembly may need to be replaced with a new level cylinder head assembly with revised valve guides, revised exhaust valves will also need to be installed to help prevent carbon build-up. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

NOTE THIS PROCEDURE APPLIES ONLY TO THE 2.0L SPI ENGINE. Download File PDF

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