88 5kq - Intermittant Hard Starting

[SJ]

From: "Huw Powell" <audi at humanspeakers.com>>
> > **** But, I'm stubborn. Analog milliammeter needles dont go negative, so
its
> > hard to figure out what the swing range is. I"ll see how much play I
have
> > with the meter needle zero adjust.
>
> Simply start with it tryign to go negative, turn 3mm screw til it comes
> positive.  Should be swinging by then.  Flip leads until it shows equal
> swing in each direction.
**** Flipping leads will work! Add a visual reference indicater (masking
tape) to indicate where needle swings to.

> Or... Radio Slack used to and probably still does sell a digital meter
> for about $40 that has a nice low mA range.  In fact, of my three DVMs,
> it's the only one capable of doing this test.
**** Besides my Radio Shack Analog meter, I also have a 20 yr old Fluke 73
DVM. It reads current either way. But the the digital readout does not react
as fast as an analog meter needle. The Fluke 73 also has a horizontal bar
graph indicator below the digital readout.
The response time for the digital display is 2.5 updates per second. The bar
graph is a lot faster at 25 updates per second.

>
> > Ok, I thought of another way of adjusting idle mixture. Using engine RPM
as
> > an indicator to tell you when you are close to or at Stoich mixture.
> > Engine warmed  up.
> > 1. Disconnect ISV
<<< many snips>>>
> > 9. For final adjustment, use either a controlled vacuum leak and/or the
> > propane to establish if you are at peak RPM, then tweak the 3 mm Allen
screw
> > to match.
>
> Yeah, that sounds like the easy way to me!
***** Who wants easy? I thought we were doing this in the name of Science,
Posterity, and Precision?

Uh oh, a new development.

Wife left this morning in the 100q, heading for the mall. I saw a liquid
trail out of the driveway. Something is leaking badly.
I called her on the cell phone, and got the location of her car. Drove to
the mall with all the standard audi liquids in the trunk.
The pentosin reservoir was almost empty. I filled it, and drove the car back
home. Checked reservoir at home and it was just a wee bit down. Not sure if
anything leaked out as there might have been air in the system when I filled
it up at the mall.

The hydraulic pump caps have been leaking and bubbling for about a year now.
Nothing major though.

I suspect the cold weather(twas nippy last night) shrinks the cap O-ring
seals enough to cause a major leak when cold. The leak seals up when the
pentosin warms up and swells the cap seals..

Another project for me.

SJ




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