B16 idle speed drops when stepped on the brakeWhen my 2007 Sentra CVT is waiting

[uabass]

When my 2007 Sentra 2.0 CVT is waiting at a stop light with the brake depressed and the A/C off , the idle speed drops down to about 600 rpm. Is this normal? I ask because at 600 rpm my exhaust pipe and muffler start to rattle a bit.

The idle speed goes back up to about 700 rpm if I release the brake, turn on the A/C or shift to Park. Then no more rattling.

If this is not normal, then can the idle speed be adjusted?

Thanks,

Modified by uabass at 1:54 PM 2/23/2010
Modified by uabass at 1:55 PM 2/23/2010

[djtorello]

Its normal for the most part. Though if it gets bad, it may be indictive of a Vacuum leak.

Did you have the recall done for the Master cylinder?

[uabass]

Okay thanks.

I will have the Master cylinder replaced with my next scheduled oil change.