Date: Tue, 30 Oct 2007 10:33:22 -0500
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: New symptoms (still not running right)
In-Reply-To: <989ea5a20710300651i42855e24r406e6a6d81edd4df@mail.gmail.com>
Content-Type: text/plain; format=flowed
The jumping tach can tell a lot, unless the tach itself is defective. Start
with looking for broken wires at the hall plug on the distributor ot the
hall sensor or distributor bushings are shot. Extra tach or igniton pulses
not only cuase spark problems but also cuase extra or missing injector
cycles. The O2 sensor will not effect starting.
Dennis
>From: TJ Hemrick <x53gunner@GMAIL.COM>
>Reply-To: TJ Hemrick <x53gunner@GMAIL.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: New symptoms (still not running right)
>Date: Tue, 30 Oct 2007 09:51:51 -0400
>
>A week or so ago, I posted about my 87 running very rough except at highway
>speeds. Most replies concerned looking over all my connections since I had
>just given the engine a lot of new parts and service. No problems noted
>there. Dennis Haynes noted that any conditions that start out fine and
>then
>go bad most likely lead to an O2 sensor. OK, I have to cut and drill mine
>out as it's jammed in so bad. Only problem is, sometimes the van runs fine
>and sometimes, it starts of really bad and/or has a LOT of trouble
>starting/restarting. Anyhow, here's a new thing that may tip some of you
>more experienced than I into where I might need to look. The other day I
>start it up and about 2-3 minutes into it, my tach goes crazy. The engine
>is loping at an idle but the tack is at 3-4K and moving around 1K or so. I
>goose the throttle and the needle responds but it goes right back to the
>3-4K range and hunts. The whole time (except for goosing) the engine is
>idling. I take off and drive normal but the needle is staying in the 3-4
>range. After about 5 minutes, it works normal. Haven't driven it since
>then (3-4 days). It still sputters and hesitates really bad. It stalled
>on
>me right smack in the middle of a busy intersection and would not restart.
>Had to get pushed over to side. It finally started about 2 minutes later.
>How is it that it runs fine at highway speeds and like crap around town?
>BTW, 3 different AFM's all the same problem. New cap, rotor, wires (double
>checked the order), plugs, air filter, and cleaned the AFM. Not gas
>quality
>as I've pumped about 15-20 tanks from different stations since this
>started.
>
>Confused in FL
>
>TJ
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