QUOTE(ricko99 @ Jan 30 2017, 02:48 AM)
Sorry for bumping old thread. My saga lmst has the same issue, idle with air cond on it shakes and rpm back to normal when accelerating. Would you mind showing which screw are you talking about to tune the idle rpm?
To remove suspense, you may refer to the picture of post #2399 in the link below.https://forum.lowyat.net/topic/2900268/+2380
If the air con idling adjustment does not change even after adjust, then it could be the gold coloured round thing tht screw attached to it (called air con idling vacuum pump or 'vacuum actuator' in the pic) is spoilt. Pls make sure it is Denso brand when replacing. Cost about RM 90 few years ago. Local brand costs half the price but only last few months. Denso last for years. I purchased the Denso part from a spare part shop in OUG years ago.
Pls also check for vacuum hose for leak (those small hoses) as they tend to crack at either end of joint. It will cause the adjustment take no effect.
Note:
1)You need to rev a bit after each adjustment for new setting to take effect.
2) Proper way is to adjust the base timing without the air con screw then only adjust air con idling screw.
This post has been edited by mot88: Jan 30 2017, 01:42 PM