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Date:         Tue, 4 Feb 2014 19:58:11 -0800
Reply-To:     "SDF ( Scott Daniel Foss )" <scottdaniel@TURBOVANS.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "SDF ( Scott Daniel Foss )" <scottdaniel@TURBOVANS.COM>
Organization: Cosmic Reminders
Subject:      Re: Rough running, black smoke, running rich, no idle
Comments: To: Robert Stevens <mtbiker62@GMAIL.COM>
In-Reply-To:  <91C5AE68-DBD3-46B6-8828-4AF04D06DEBD@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Only one minor problem with the stuck EGR Theory .. Waterboxer vanagons don't have 'em.

On 2/4/2014 2:21 PM, Robert Stevens wrote: > On Feb 4, 2014, at 3:05 PM, TJ Hemrick <x53gunner@GMAIL.COM> wrote: > > 87 Vanagon GL, 2.1, Auto. Water pump gave up the ghost-fixed that, > starter issues-finally got a good one, now the beastie won't idle to save > it's life. If I disconnect Temp 2 it idles at 1800 rpm (smooth as silk) no > matter what else (even the air screw in the throttle body completely > closed). New Temp 2 sensor-no change. O2 sensor, no change connected or > not. Starts smooth but within minutes, runs really rough, misfires, > running *super* rich (black smoke). Any thoughts or suggestions? > > TJ, > Whether this has anything at all to do with your motor/situation or not????? > > My Subie 3.0 H6 had exactly the same symptoms. Turned out to be the EGR. > > It does not work/open until you accelerate, then the valve opens and recirculates > exhaust into the intake. When the valve stops working (mine was blocked open > with a small piece of carbon, and eventually burned a cract/crease in the valve > seat, and would not work) properly, it stays open at idle, which makes the idle > engine speed up and run rich. > > The easy diagnostic is to start the engine and immediately touch the EGR. > If it's warm right away, that means exhaust is pouring through it, which it should > not at start-up-idle. It should only get warm if you immediately accelerate, which > opens it's valve normally. > > Bob


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