what causes this to happen? i want to fix this..it will idle low then drop causing the car to shake and bounce up about 500 rpm. lmk. thanks

 

what does it idle at normally ( as in when the a/c is off) ? you will notice a drop in rpms when the a/c is on due to the amount of power it needs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by King_j &raquo;</TD></TR><TR><TD CLASS="quote">what does it idle at normally ( as in when the a/c is off) ? you will notice a drop in rpms when the a/c is on due to the amount of power it needs.</TD></TR></TABLE>

it shouldn't be that low though.......the ecu should compensate for the power that the AC takes......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by King_j &raquo;</TD></TR><TR><TD CLASS="quote">what does it idle at normally ( as in when the a/c is off) ? you will notice a drop in rpms when the a/c is on due to the amount of power it needs.</TD></TR></TABLE>

It idles normal but when the A/C is on it idles lower causing rough idle.

 

there could be something wrong with your IACV

 

what does the IAVC do?

 

umm my rpms jump up bout 50 when i turn ac on..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by darkirony &raquo;</TD></TR><TR><TD CLASS="quote">umm my rpms jump up bout 50 when i turn ac on..</TD></TR></TABLE>

does this make no sense? or is it me?

 

it does that in my car when the car is in park. the rpm's rise a little and fall. its very normal in 4cyl cars that don't have alot of lowend power. its another reason i seldom use mine when sitting in traffic, well that and the weather isn't too bad in utah. plus, you don't get good airflow thru the radiator when sitting idle.