1986 trans am 305 tip. increase a/c idle?


Old 05-12-07, 01:49 PM
Thread Starter
Join Date: May 2007
Posts: 1
1986 trans am 305 tip. increase a/c idle?

how can I increase the ilde when the air conditioner compressor is running? Below 1,000 rpm, the compressor vibrates a lot and make a bad sound. Above 1,000 everything is ok... new compressor. I am aware how to adjust the idle without the a/c running... by turning the factory-sealed adjustment screw near the air intake, intake manafold...

Sponsored Links
Old 05-12-07, 08:07 PM
Join Date: May 2006
Location: Iowa!!!!!
Posts: 3,753
Not completely familiar with that particular engine, but....

Check to see if there isn't a device on the engine that takes care of that, although it may be malfunctioning. It could be along the order of a vacuum modulator (similar to a Toyota design of mid eighties). Those would allow what amounts to a small air leak into the throttle body to increase the RPMs.

The activation on it was through a solenoid valve triggered by the ac clutch current.

Frequently, on the smaller engines you would find something similar to speed up the idle to compensate for the extra load on the engine.

Hope this helps,


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes