Re: re no rough idle

[jtrealty@xxxx]

To check for vacuum leaks first do a complete visual inspection of all 
of the hoses. This may require removal of some to examine properly. 
You can use a vacuum tester on each one and pull a vacuum and watch 
how long it takes to bleed off. You could plug hoses and see if that 
improves the idle. The point is there is no one way to do this. If you 
suspect a vacuum leak you must be very methodical and check everything 
but first look for the obvious like a hose fell from in front of the 
motor by the firewall. On an automatic don't forget to check the line 
to the modulater! A noisy mode switch can be a major vacuum leak. Also 
make sure that the idle motor is controlling the idle, you can test 
this by pulling off the plug to the idle motor. If this doesn't affect 
the idle then it isn't controlling it. All three of the large brass 
adjusting screws on the air inlet manifold should be LIGHTLY seated 
closed and the idle micro switch should be working so that at idle it 
clicks. If the cold start valve was running continously you would be 
flooding the motor so I don't think the problem is there. Pull the 
plug on it if you want to convince yourself.
David Teitelbaum
vin 10757


--- In dmcnews@xxxx, Joe Palatinus <jpalatinus@xxxx> wrote:
> >The 
> >mixture screw is a very sensitive adjustment so if a 1/2 turn isn't 
> >making a difference you probably have a vacuum leak somewhere 
(which 
> >might account for your bad gas mileage)
>