My Honda Accord 10th Anniversary Edition has over 500,000 miles. It has run really very well. I moved from Southern California to Southern Nevada that is when I noticed slightly engine hesitation or lack of acceleration. I can correct this by release the gas pedal and engaging the gas pedal. I really like to find the source of the issue.

Also, I would like to find out how to convert the old AC to the new AC recharging refrigerate solution.

Thanks

First, try replacing the fuel filter. If the problem persists, it is likely ignition system related. Try replacing the spark plugs (NGK only), if they have not been changed lately. I would also check the timing with a timing light. If the problem persists, I would change the Ignition Control Module (ICM), coil, rotor, and distributor cap. ICMs and coil should be changed every 125,000 miles or 10 years, whichever comes first.