Date: Sat, 23 Jan 2010 15:23:46 -0500
Reply-To: mordo <helmut.blong@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: mordo <helmut.blong@GMAIL.COM>
Subject: Powerwashing FAIL
In-Reply-To: <de48c0be0912041453m69f5a027tab2c19958a0153a9@mail.gmail.com>
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Citizens,
I've revisited this issue finally. I've done some testing and I'm still
baffled.
Summary:
1. Seemingly coincident with the aforementioned powerwashing escapade,
the engine will not cold start without applying some throttle and will not
hold idle without holding the throttle open slightly.
2. Once warm(and not even completely warm), the engine runs well; it will
even hold a slightly wandering idle at stop (800-950 rpm).
3. I've tested the ISV and it snaps open and closed smartly. However, it
does not hum at all when the engine is operating.
4. I've tested current at the ISCU, it's there. So, ISCU is bad is the
diagnosis?
5. I've tested the TPS for adjustment and current. 5 volts at the
connector, as specified
6. I cannot find any other component amiss - vacuum, electrical or fuel.
7. Even after sitting for weeks, the engine starts immediately if I give
it a little throttle.
Questions:
1. What is likely to be at fault given these circumstance? Fuel?
Ignition?
2. Does the ISCU figure into the cold start operation?
3. If the engine will idle decently without an operational ISCU and ISV,
what will happen if I input a working ISCU?
Any ideas, anyone?
cheers,
mordo
---------- Forwarded message ----------
From: mordo <helmut.blong@gmail.com>
Date: Fri, Dec 4, 2009 at 5:53 PM
Subject: Powerwashing FAIL
To: vanagon@gerry.vanagon.com
Hey, gang. Happy Friday.
Recently, I changed AT oil and filter and was eager to know if I had, at the
same time, fixed weeping oil filth. So, I took La Vana Blanca for an
engine/trans/diff wash at the local self-serve carwash. I soaked it all up
with the engine cleaning selection and then blasted it all with the
"powerwash" device. I did all of this with the engine running under the
premise that if I got anything sufficiently wet enough to make it shut down,
it would be good to know right away. Nice, clean engine and trans, no prob,
drove home.
Long story short, I have since not been able to start the engine without
coaxing the throttle a bit. It will not hold idle when cold. After coming up
to operating temp, it will idle but at about 850 rpm and a little bit lumpy.
My question of the collective experience is: what is the most likely
component to cause this condition under the conditions described above? BTW,
the engine was running very nicely prior to this folly.
Cheers and thanks for any wisdom you can offer.
--
mordo
1990 Carat
2.1l WBX, AT, 171k miles
--
mordo
1990 Carat
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