Re: Not so hot start problem

["jtrealtywebspannet" <jtrealty@xxxx>]

You should not be messing with the mixture adjustment screw. It is a 
very sensitive adjustment so that 1/8 turn can mean the difference 
between passing emmisions and not passing. Generally they do not need 
to be adjusted. If there is an emmision problem it is usually 
corectable by finding the problem and repairing or replacing it, not 
"tweaking" adjustment screws. Now that you have moved it the only way 
to properly reset it is to get on an exhaust gas anylizer. To cure a 
hunting problem make sure the air flow sensor (the round plate) isn't 
rubbing the housing. Next have all of the injectors cleaned and tested 
so that you can get a set calibrated very close to each other. Do a 
compression test on the engine and verify all cylinders within less 
than 5%. Install new spark plugs and wires. Set the timing. If you do 
all of this and have no vacuum leaks the engine will not hunt or surge 
at idle when warm. Do not try to correct a hard start problem by 
adjustments as there is no adjustment that will help unless the 
mixture screw is WAY out of adjustment. Make very sure that there is 
NO vacuum leak at the hole above the mixture screw, there is supposed 
to be a tamperproof plug in there but I have seen golf tees, tape, 
screws, etc and sometimes nothing at all!!!
David Teitelbaum
vin 10757


-- In dmcnews@xxxx, DHughes030@xxxx wrote:
> In a message dated 3/11/02 3:33:45 PM Pacific Standard Time, 
> jtrealty@xxxx writes:
> 
> 
> > What do you mean by "adjusting the idle screws"? The 3 brass 
screws 
> > are supposed to be lightly closed period
> 
> David, I am talking about the idle mixture screw on the air flow 
sensor arm. 
> Walt, I'm certain that the recent adjustment resulted in the 
unmasking of 
> this concern because I set the screw right a few months ago and 
found that it