Re: idle problem

[jtrealty@xxxx]

Idle quality can usually be reduced to one or a combination of the 
following problems:
An imbalance in the ignition system ie: a bad wire or spark plug
A vacuum leak or a malfuntioning vacuum valve
A misfiring, leaky, dirty fuel injecter
Someone trying to set idle with the 3 brass adjusting screws.(They are 
ALL supposed to be LIGHTLY seated closed)
A problem with the idle micro switch.
In general to improve idle quality if the motor hasn't been tuned up 
in a long time it might be overdue for one. On our cars, most of which 
don't accumulate significant mileage time ages components so even if 
you only have 5000 miles since your last tuneup how many years has it 
been? Also how old is the gas? Stale gas makes the motor stumble, 
hesitate, backfire, hard cold start. Use up the tank as far as you can 
and fill with fresh 91 octane and see if that makes any difference. If 
you still have trouble then you might have to do a compression test 
and valve adjustment. If all of the cylinders are not within 5% of 
each other you cannot get a smooth idle.
David Teitelbaum
vin 10757


--- In dmcnews@xxxx, klaus.steiner@xxxx wrote:
> Hi group,
> 
> Following problem occurs:
> My engine idles between 500 an 1000 rpm when warm, idle speed
> microswitch works. When I press the full throttle enrichment 
microswitch
> the frequency valve changes noise and the engine idles at 1000 rpm. 
Any
> suggestions? 
> 
> Klaus Steiner
> #05980 Germany
> www.steinerklaus.de