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).
Look for plugs made from iridium or platinum for the longest life (copper has the shortest lifespan â generally about 20,000 miles). Oil Leaks: When you pull a spark plug out of the engine, the base should be relatively clean. If there is oil present, it means thereâs a leak. Not only does that mean youâll need to replace a blown seal, but it means your spark plugs will need to be changed more frequently because of contamination.