Re: [DML] vacuum problem analysis please!

["content22207" <brobertson@xxxx>]

Problem 1: could be mechanical. Make sure throttle plates are closing
all the way. Can tighten spring on throttle spool by moving to next
slot. Was a thread not long ago about binding accelerator cable. Could
also be lower screw in Problem 2. Is your throttle connecting rod
screwed out too far?

Problem 2: lower screw only used if setting idle speed manually.
Automatic idle speed system serves same purpose as cracking throttle
plates. Properly functioning is even more advanced -- serves same
purpose as variably cracking throttle plates in response to different
engine conditions. Back that screw out until it does not contact stop
bracket.

Of course upper screw should just trip microswitch. Too far and
throttle plates won't completely close.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, Soma576@xxxx wrote:
> 
> however now that everything is set right, i have a couple more
collateral 
> problems:
> 
> 1). when you give it some gas and let it come back down to idle, it
idles at 
> about 1000RPM. that's too high. it is smooth but won't go all the
way back 
> down. if i let it run at 1000 for about a minute it actually drops
back down 
> on its own sometimes. what is causing this? i am 100% positive that
the idle 
> microswitch works and switches as it should....
> 
> 2). i think the stop screw on the throttle hammer (the piece that
trips the 
> microswitch) - is not set right anymore. i unscrewed it to see if
it would 
> drop the idle a little (i messed with it last year too so i wondered
if it was 
> set right anymore) but it didn't help any. actually i know it
shouldn't since 
> idle is electronically controlled but maybe it was WAY off... how do
i set 
> that stop screw (the lower one - not the one that hits the switch)
against the 
> brass stop piece so it is adjusted right? if it is down too far,
the throttle 
> plates are cracked open, so where is the right point to screw it in?
either 
> way, right now it still trips my microswitch. i just want the
throttle plates 
> open however much they should be at idle.
> 
> all tests are being done with the engine at operating temp. i can
hear my 
> idle speed motor buzzing too.
> 
> any tips are appreciated - please CC to my personal email so i can keep 
> working over the weekend.
> 
> Andy
> 
> 
> [Non-text portions of this message have been removed]