When I am on my brakes in my CRX and at a stop the idle drops from 1000 to 500 and sometimes even lower. When I get off the brakes it idles back at normal. Just replaced master cylinder and all calipers and rotors... any ideas? Is there an air bubble in one of my lines? Any help would be great. Thanks!

 

bump

 

sounds like the MAP sensor, or a vacuum leak. does it idle fine when in park? does it drop really low when you turn on AC or heat? or put it in gear?

 

Idles fine when I am not touching the brake pedal. Does not drop down when ac / or heat is turned on. So no one thinks it has anything to do with my brakes. Maybe just the map sensor.

 

Sounds exactly like the brake booster line..

 

Where is the brake booster line located? Pictures would greatly help!

 

Just to add one more thing. If you pump the brake pedal fast when the idle drops the idle will raise to normal idling.

 

Mine is doing the same thing. Only when the car is completely stopped...... Take my foot of the break and its fine.

Anyone have a pic of the booster line you are talking about?

 

thanks a lot, I'm driving my all-trac right now so when I get home I will check it out. But if i remember i did see a crack in it when i swapped the motor in awhile ago. Thanks once again this problem was so anoying


Modified by ghost_ryder35 at 6:39 PM 5/12/2005

 

This is a possibility also, it could be a clogged IAC Valve with excess carbon clogging the screen preventing it from idling good.