ATP is hydrolyzed into ADP in the following reaction: ATP+H 2 OâADP+P i +free energy. Like most chemical reactions, the hydrolysis of ATP to ADP is reversible. The reverse reaction combines ADP + P i to regenerate ATP from ADP. Since ATP hydrolysis releases energy, ATP synthesis must require an input of free energy. ADP is combined with a phosphate to form ATP in the following reaction: ADP+P i +free energyâATP+H 2 O. ATP and Energy Coupling
Getting Started. Fouled, damaged, or worn out spark plugs can lead to a variety of engine problems, such as misfires, hard starts, increased emissions, and poor fuel economy. For most vehicles, you should replace your spark plugs every 30,000 miles (consult your owner's manual for your specific interval).
How to Replace Spark Plugs in the 4.6L & 5.4L F150. The engineers at Ford made replacing the spark plugs on the 4.6L and 5.4L engines a difficult task. Not only are the locations difficult to access, but then there's the risk of stripping the spark plug threads.