Question about 2009 Ford F-150
cylinder no.4 misfire detected
misfire detected during startup -first 1000 revolulations
Posted on Aug 25, 2010
Testimonial: "thanks a bunch,. very helpful"
Misfire #4 cylinder and misfire with in first 1000 revolutions of starting.
Posted on Sep 12, 2010
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Posted on Jan 02, 2017
SOURCE: Service engine light came on
pic up a manual at the zone-it has the standard list what each code signifies-remember they dont always tell u the solution cause physical problems in engine require inspection
Posted on Aug 17, 2010
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2004 Marauder and 2003-2004 Mustang vehicles built before 12/19/2004 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.
Diagnose engine for engine misfire concern. If diagnostics determine an engine misfire which is characterized by leakage through exhaust valve(s), only replace the affected cylinder head(s).
SERVICE PROCEDURE FOR VEHICLES WITH RUNS ROUGH/MISFIRE CONDITION:
1. Perform relative compression check on all cylinders. If abnormal, check cylinder leakage and actual compression for "low" cylinders refer to Workshop Manual (WSM), Section 303-00.
2. If leakage/compression check indicates a valve train concern, per valve train diagnostics in WSM, Section 303-00, replace cylinder head and cam assembly, pipe plugs and timing chain tensioner, per procedure outlined in WSM, Section 303-01.
3. If cylinder leakage and compression tests are inconclusive, perform misfire diagnostic, per TSB 05-22-8.
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