![]() Perform relative compression check on all cylinders. SERVICE PROCEDURE FOR VEHICLES WITH RUNS ROUGH/MISFIRE CONDITION:ġ. ![]() ![]() If diagnostics determine an engine misfire which is characterized by leakage through exhaust valve(s), only replace the affected cylinder head(s). If the MIL is on steady state due to a misfire, this indicates the threshold for emissions was exceeded and caused the vehicle to fail an inspection and maintenance tailpipe test.Īpplication Key On Engine Off Key On Engine Running Continuous MemoryĬould be an ignition coil !An to replace it the intake manifold has to come off !Ģ004 Marauder and 2003-2004 Mustang vehicles built before equipped with 4.6L 4V/5.4 4V engine may exhibit a runs rough, lacks power, and engine misfire, prompted by a MIL light and DTC codes P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0316.ĭiagnose engine for engine misfire concern. The malfunction indicator lamp (MIL) blinks once per second when a misfire severe enough to cause catalyst damage is detected. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. ![]() The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. NOTE: x represents cylinder number 1 through 9. ![]()
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