Some customers may comment on an engine misfire on rare occasions. Typically, misfires related to this valve sealing concern will be very intermittent. The intermittent misfires may or may not be felt by the driver and they will normally occur during engine warm up, deceleration, highway driving, wide open throttle acceleration, and/or uphill driving.
Additionally, DTCs P0300, P0700, and/or P1781 (2004 models)/U0401 (2005 models) may be set. If a brief engine misfire occurs, it is possible that a P1781 or U0401 DTC may set without the presence of a DTC P0300. The engine misfire may be experienced due to a valve sealing concern. Replace all 8 exhaust valves, all 8 intake valves, and all 16 valve seals or replace all 8 exhaust valves and all 16 valve seals depending on the VIN number.
Tuesday, December 18th, 2018 AT 6:09 PM