Q: Engine misfires and ticking sound on startup, coasting, and acceleration.

When I first start my car the engine makes a loudish and consistent knocking sound coming from the upper half of the engine on the drivers side. None of the vales seem loose and I've checked for leaks and can't find any. After around 5 minutes of running the rpms lower and the knocking stops. When I accelerate hard ito starts knocking again, but only during the time I'm using the gas pedal. With the misfires it's fine on idle and startup but is only an issue on accelerating and coasting. Such as when I'm on the freeway and let off the gas a little, or starting from a stop at a red light. The service engine/check engine light has not come on at anytime the misfires occur. The light does work though as I've put the key in the 2nd position, without starting the car, and the light works during the testing phase. The misfires are always an issue on acceleration whether or not the car has been running for a while. I've replaced the spark plugs, cleaned the throttle body, and used fuelcleaner

My car has 152687 miles.
My car has an automatic transmission.