Car dies when i turn on the a/c

bdazzgt

I had to jerk off the cable to get it to stop.
Dec 27, 2005
328
0
16
Springfield MO
so recently i had to put a new evaporator in the dash to get the air conditioning to work. Anyways the air works great at highway speeds, but driving through town it idles around 5-600 rpms and if im slowing down it kills the motor i know something should kick the idle up when the ac is turned on, how do i diagnose this and fix it, other than when the a/c is on the car runs great no surge or anything...thanks guys
 
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Mustang5L5

i'm familiar with penetration
Mod Dude
Feb 18, 2001
33,101
9,235
224
Massachusetts
Clean the iac. Then perform the idle reset procedure so it can relearn idle.

I'd post the procedure, bit I am on an iPhone
 

jrichker

StangNet's favorite TOOL
SN Certified Technician
Mar 10, 2000
27,402
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lowendmac.com
See the "Surging Idle Checklist for help with all your idle/stall problems.

The quick and easy way to dump the codes is in there too, and all you need to do it is a paper clip! The first two posts contain all the updates to the fixes. At last count there were 24 possible causes and fixes for surging idle/stall problems. I continue to update it as more people post fixes or ask questions.
 
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