View Full Version : 89 brougham strange air leak?

09-14-08, 04:43 PM
When I shift my 89 brougham into reverse or drive I hear air hissing. When I press the accelerator it disappears. Also no hissing in park or neutral. Doesnt seem to affect performance but would like to know what it is. Any ideas?

09-14-08, 05:31 PM
The brake pedal arm has a vacuum release switch for the parking brake. It's likely this that you are hearing. Get your head under there and check the lines while you pump the pedal with your hand - you will likely find it.