Here's a possibility: if you have one injector which leaks, losing fuel
pressure in the lines at startup, it can lead to the slow "catching" of the
engine. If the leaker is one of the first cylinders to fire after the
engine starts to spin, it may act flooded, significantly delaying actual
self-sustaining operation. If it's, say, fourth up after you turn the key,
and one or two others fire on the way there, it may spin fast enough to
clean itself out during the exhaust stroke it makes before compression.
Hope this make sense - the need for sleep is making this more difficult to
explain than it should be.
Checking pressure before starting would help. I've had one car which
started better if I turned the key to "On", waited until the fuel pump
stopped whining (i.e., the lines were pressurized), and only THEN turned the
key to "Start" position; I always supected a scenario like above was
responsible.
Ron
----- Original Message -----
From: "Marshall Grice IV" <[email protected]>
To: <[email protected]>
Sent: Wednesday, October 09, 2002 10:14 PM
Subject: [a2-16v-list] Re: [a2-16v-list]
>- What exactly is it that your car does?
here goes the sound effect version...
motor catches and then sounds something like "buda buda buda buda buda
brrrrrrr"<----that's the normal idle sound btw.
Technical description...
Sounds like it runs on 3 cylinders for 2-8 sec after start up "sometimes".
I have yet to figure out what the common element is in the "sometimes". It
apparently isn't time between starts or air temp or engine temp or parking
angle. I'm confused. When i first started trying to figure this out i
thought it was low fuel pressure at startup. I've replaced both fuel pumps
and the accumulator, no change. I've changed...i think all of the sensors,
nada. The last two things on my list were the injectors and the fuel
distributor but both of are expensive enough to no do them for the heck of
it. Other then this occasional starting problem the car runs just fine.
Well there is the bog at ~3k but i see that on everyone's dyno chart so i
can only assume that it is "normal". Considering that this is only a
starting problem that happens for a couple seconds intermittently, i've not
wasted any more money or time on it. I just sit here and wait for either it
to officially break or for someone else to figure out what is causing it and
tell me how to fix it.
I know i'm of no help.
Marshall
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