[DML] Re: startup video
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[DML] Re: startup video

In theory, frequency valves don't fluctuate until water temp is up. In
practice, they seem to monkey with the lower chambers anyway. Numerous
times I've unplugged the frequency valve on a cold engine and had that
characteristic idle hunt smooth out. Don't know what fails between
theory and practice, but something obviously does.

Regarding CIS -- you're at the mercy of the idle speed motor & control
module. Mine stuck closed at a stoplight once. Had to ride the
accelerator pedal to crack the throttle plates until I could get home
and throw the stupid thing away. 'Twas then that I figured out what
the balance screws were for and how to set them.

Why the comment about carburetion? (It's true, but curious since so
very few of us run it).

Bill Robertson

>--- In dmcnews@xxxxxxxxxxxxxxx, "Elvis" <elvisnocita@...> wrote:
> Farrar - this thread comes up every 4 weeks, so please check the 
> archieves.
> others also may read the manual which says that the lambda system
> is deactivated when cold ! (constant PWM/Frequenca on the Frequency 
> valve !)
> If the idle system would be failing - why would the idle speed 
> motor then be working ????
> check your mixture, it may be too rich and/or the warm up regulator
> may be out of calibration. In most cases a regular tune up will
> solve this problem. (Co-tester needed !!!!)
> Again - it's a comon issue, repeated every few weeks and
> not valid for carburated cars...
> Elvis & 6548

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