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Tech Area => General Buick Tech => Topic started by: 1987GN on October 08 2013, 10:25:36 AM

Title: Why does my idle drop when ac compress turns on?
Post by: 1987GN on October 08 2013, 10:25:36 AM

any ideas?

Title: Re: Why does my idle drop when ac compress turns on?
Post by: Steve Wood on October 08 2013, 11:28:38 AM

Is the IAC changing to compensate for the additional load of the compressor?

Title: Re: Why does my idle drop when ac compress turns on?
Post by: daveismissing on October 08 2013, 02:01:46 PM

What chip?

Title: Re: Why does my idle drop when ac compress turns on?
Post by: 1987GN on October 08 2013, 03:38:59 PM

TT 93 Chip...gonna clean the IAC tonite.

Title: Re: Why does my idle drop when ac compress turns on?
Post by: Steve Wood on October 08 2013, 04:14:05 PM

Do the iac counts change when you turn the compressor on?

Title: Re: Why does my idle drop when ac compress turns on?
Post by: 1987GN on October 08 2013, 09:38:42 PM

Steve,

The IAC #s do climb BIG time when the compressor comes on...So?

Title: Re: Why does my idle drop when ac compress turns on?
Post by: Steve Wood on October 08 2013, 10:08:35 PM

so the iac should be working to provide more air...Perhaps cleaning will help make it effective

Title: Re: Why does my idle drop when ac compress turns on?
Post by: 1987GN on October 08 2013, 10:37:58 PM

I just bought a new one...$35..  See what happends.   Thanks John

Title: Re: Why does my idle drop when ac compress turns on?
Post by: Steve Wood on October 08 2013, 11:50:00 PM

should read just like the old one.

be sure not to over tighten it when you screw it back together after cleaning the passages

Title: Re: Why does my idle drop when ac compress turns on?
Post by: 1987GN on October 11 2013, 09:13:41 AM

New IAC did the trick....idles great!  You can hear it idle up when the compressor turns on also!   :)

Title: Re: Why does my idle drop when ac compress turns on?
Post by: Steve Wood on October 11 2013, 09:44:41 AM

guess it was sending commands but the old one was fried inside...glad it did the job!

Title: Re: Why does my idle drop when ac compress turns on?
Post by: 1987GN on October 11 2013, 10:04:01 AM

 :cheers: Thanks Steve !