RE: [DML] Re: Flat running

["John Hervey" <john@xxxx>]

See below.

-----Original Message-----
From: cruznmd [mailto:racuti1@xxxx]
Sent: Sunday, August 17, 2003 8:55 AM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] Re: Flat running


I agree that the WOT wouldn't be the sole cause of this.( Are you talking
about the WOT switch.)
I put the timing light on the engine and the timing advanced as I
revved it up. It appeared to be in spec with what the manual required.
The advance solenoid clicks when I open & close the idle microswitch
but that doesn't necessarily mean it's working does it?
( Normally yes unless the diaphragm is broken.)

Vacuum lines are routed in accordance with the diagram in the engine
cover.( ok )

Initially, the car idled roughly and would hard start cold and I'd
have to feather the gas to keep it running. It appears that the cause
of this was incorrectly set CO screw.
( If the screw isn't set correctly the control plunger in the distributor
isn't high enough to feed the injectors.This adjustment is critical, the
plunger in the rest position has shut off fuel to the injefctors, then when
you start to crank the small amount of air sucks down the metering plate
which makes the plunger rise, thus you feed the injectors. )
I started richen the mixture,( ok )
and keep the idle sane by adjusting the throttle linkage (which was
on an extreme end anyway by P.O.) and re-setting the timing. ( ok, but what
happened to the micro switch settings if you re adjusted the throttle body
lever)

Now it starts and idles like a dream from stone cold. It has more
power, but still not enough. I feel I have a little more play with
the fuel mixture but when I reach the point of diminishing returns
I'll have to put a pressure gauge on the system and check control
pressure.
( Rich, It starts now because you have adjusted the control plunger to rise
high enough manually, but it may be out of adjustment as the engine would
normally run. In other words the plunger may not be rising high enough or to
much now to give the correct amount of fuel. Thus, slow or sluggish or not
enough power. Keep in mind all this adjusting has to be done when the engine
is hot.
John Hervey

--- In dmcnews@xxxxxxxxxxxxxxx, "Harold McElraft" <hmcelraft@xxxx>
wrote:
> The WOT on has a minimal impact so I doubt if that is not your
> problem. Does it start and idle OK? If so, I would suspect failure
> in the vacuum advance system somewhere, the throttle plate is
> sticking or, the idle motor switch that operates the vacuum advance
> solenoid in unison with the idle motor is stuck too, like your WOT
> micro switch. Are the vacuum hoses routed properly? Double check
> this too. Timing light is a tool that can tell you if the advance
is
> operating.
>
> Harold McElraft - 3354
>
>
> --- In dmcnews@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote:
> > My suspects are: timing advance failure, combined with the
absence
> of
> > the WOT microswitch, and/or maybe some smaller vac leaks. Any
> > additional suspects are welcome.
> >
> > Rich
> > #5335