Date: Wed, 21 Aug 2002 09:19:01 -0700
Reply-To: Steven Dodson <steven@EPOCHDESIGN.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Steven Dodson <steven@EPOCHDESIGN.COM>
Subject: Re: Not passing smog, still... Need help!
In-Reply-To: <LAW2-F10Sp2WEnKS7vz00011ee7@hotmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Some more questions, if I may?
How does one successfully find a small vacuum leak and what is the best way
to seal it?
The vent pipes from the idle stabilizer to the plenum and others, have no
clamps on them. Are they supposed to? Is there any special test I can
perform to verify the function of the ISV or ICU?
Is the small exhaust leak on #3 a factor here?
Can testing the O2 sensor while it's plugged into the ECU damage the ECU?
I would think it's best to test it unplugged. I ask because I remember the
mechanic testing the sensor while it was still plugged in. It was right
after that visit that the ECU started to die on me. On the other hand, I
don't see how it would oscillate if it's not plugged into the ECU and the
ECU isn't compensating the mixture, hence making the sensor react. How do I
really tell if it's bad?
On the O2 sensor, 0-1V, higher voltage is rich or lean?
As I had stated in my first inquiry into this subject, I have tested the
injectors and they look good, now that I back flushed them. This is not to
say that they are perfect, the spray pattern looked very good and equal
between cylinders. This was not the case when I first tested them, #2 was
clogged.
I guess I should use a better fuel from now until I get the next smog.
I will take the advice of raising the idle to 1100rpm to see if this also
helps.
HC limits are 150 at idle and 180 at 2600rpm.
FYI- I've been told by BAR that in CA there is no limit to the amount of
money you can spend to get a vehicle to pass smog. This is a newer law I
think. I'll talk to the smog ref about getting extensions until next summer.
I just want to get that 1.9TD installed.
-Steven Dodson
Kneeland, CA
"Inga" the 87 Syncro
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of Bruce Nadig
Sent: Wednesday, August 21, 2002 6:43 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Not passing smog, still... Need help!
I'd even go one step further and recommend changing the engine oil and
filter immediately before going for the emissions check.
>From: Dennis Haynes <dhaynes@OPTONLINE.NET>
>Reply-To: Dennis Haynes <dhaynes@OPTONLINE.NET>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Not passing smog, still... Need help!
>Date: Tue, 20 Aug 2002 22:52:52 -0400
>
>The low CO reading is a bit low but this may be a sign the cat is
>working. The fact that you have excessive HC at idle indicates a either
>a "lean miss-fire" or a valve problem. The lean miss fire may be caused
>by an out of tolerance injector or a small vacuum leak. Excessive carbon
>deposits on the valves may also be a problem. Most idle tests will allow
>you to idle the engine up to 1,100 RPM. Turn the idle up to about 1,000
>RPM. This will help even the mixture across the cylinders, allow more
>air to reduce the HC and help eliminate the lean miss. It will also help
>to drive the van on the road and then immediately get it onto the test
>machine. You probably only have to get the HC below 200 at idle to pass.
>You are very close. Also make sure that the oil is fairly clean, correct
>viscosity, and not over-filled. Hope this helps.
>
>Dennis
>
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