car vibrates in gerar with air and brake on on 2004 Honda Accord

but does not vibrate when air is off and in gear and brake on. Also does not vibrate with air on and in park or neutal

Asked by for the 2004 Honda Accord
1 answer
Check engine mounts and serpentine belt TENSIONER.Also check under the car and see if the exhaust damper right behind the flex section is broken.