2006 LR3 HSE 4.4L V8. 175,000 miles.
Been getting P0300, P0301, P0307, P0308, missfire on startup with in first 1000 revolutions.
Replaced plugs, PCV, Cleaned MAF sensor and throttle body. No vacuum leaks. Had a leak down test done and air was coming out the intake and nowhere else.
My question is... Could I be suffering from carbon build up on the intake valves or am I looking to replace the valves?
Funny thing is... It only misfires on startup and once the engine warms up it runs fine with no misfires showing on code reader.
Been getting P0300, P0301, P0307, P0308, missfire on startup with in first 1000 revolutions.
Replaced plugs, PCV, Cleaned MAF sensor and throttle body. No vacuum leaks. Had a leak down test done and air was coming out the intake and nowhere else.
My question is... Could I be suffering from carbon build up on the intake valves or am I looking to replace the valves?
Funny thing is... It only misfires on startup and once the engine warms up it runs fine with no misfires showing on code reader.
