Date: Sat, 20 Sep 2003 08:50:53 -0500
Reply-To: Chuck Mathis <cmathis@HOUSTON.RR.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Chuck Mathis <cmathis@HOUSTON.RR.COM>
Subject: Re: please help!!! I dunno what to do 85' 1.9L
In-Reply-To: <200309200223.h8K2NCBZ025619@txmx01.mgw.rr.com>
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Tracy,
If the O2 is disconnected and it is still running rich your AFM may be the
problem. What do you mean by "it definitly isn't working right"?
One of the main reasons the 1.9 will run rich is air getting into the system
betwen the AFM and the O2 sensor. Check the intake boot to make sure it is
tight with no cracks and still flexible (mine was hard as a rock). Tighten
the clamps at the AFM and throttlebody. Ensure the crankcase vent hose
connection is tight and the hose is crack free and still flexible. Check
the boots on the intake runners for the same (mine crumbled in my hand).
Check the condition of the vacuum hoses -- won't do much for running rich
but since you're looking anyway ... Same with the fuel lines.
Give your exhaust system a good inspection. Look for evidence of exhaust
escaping at the heads and joints.
All these can let air in causing the O2 sensor and AFM to give incorrect
signasl to the ECU. The ECU reacts by sending more fuel.
If the AFM isn't metering correctly give it a good cleaning. If there is a
groove worn in the carbon strip try loosening the screws and shifting the
board. If none of this helps try replacing the AFM.
Chuck
'85 Wolfsburg Westy - 'Roland the Road Buffalo'
on 9/19/03 9:20 PM, Automatic digest processor at LISTSERV@GERRY.VANAGON.COM
wrote:
> Date: Fri, 19 Sep 2003 15:19:56 -0700
> From: Tracy Bonin <icculus22420@YAHOO.COM>
> Subject: please help!!! I dunno what to do 85' 1.9L
>
> What a crappy week, the bus had been running rich for a few months, so I
> thought that putting an O2 sensor in it would help my issues. (I haven't had
> one in about a year) It actually made it run worse, so rich it was burning my
> eyes and diluting the oil with gas. So we unplugged it, but it's still doing
> the same thing.( I know this is extremely bad and plan on doing a oil change,
> and spark plugs before I drive it again. ) It is also bucking and feels almost
> like cruise control picks up and slows itself down, loss of compression
> (probably from oil dillution), lack of power. I changed the Temp II sensor, no
> change. We did every test in the book on the fuel pressure regulator, vaccuum,
> fuel pressure, etc, and it's fine. Upon doing tests to the air flow meter, it
> definitly isn't working right, but before I spend the money on it, I'd like to
> see if the censes thinks that might be it , I don't know what else to do. It's
> my daily driver ( for 2yrs now) and has never given me this m!
> any
> issues. My BF is letting me use his car for the time being, but I can't use
> that forever.
>
> Also does anyone have an AFM? I will post another post on that though......
>
> thanx,
> Tracy
> 85' GL "Ripple"
> 65' Splitty
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