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Date:         Fri, 15 Nov 2013 11:16:22 -0600
Reply-To:     JRodgers <jrodgers113@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         JRodgers <jrodgers113@GMAIL.COM>
Subject:      Re: '88 GL intermittent ignition miss
Comments: To: Scott Daniel <scottdaniel@TURBOVANS.COM>
In-Reply-To:  <5285906B.5000304@turbovans.com>
Content-Type: text/plain; charset=UTF-8; format=flowed

I vote for Hall Sensor failure. My 88 GL would run along just fine - then suddenly for a moment - just die....period. hen it would catch and go again It was a total ignition break - nothing firing. If it were a fuel problem, I think it would sputter at least a little bit, give some kind of warning - but mine just quit stone cold dead - then would catch just as it began to lose speed. This went on a while - then it just died - won't start. I'm pullling a known good distributor out of my parts car to try out this weeekend, - but I'm almost certain it's the hall sensor. Without the hall sensor signal the ECU doesn't know what to do.

John On 11/14/2013 9:09 PM, Scott Daniel wrote: > If the tach dips or the needle jiggles say ... > my thinking would be drawn to the distributor. > > I'd try a known good one for a first step. > It's mandatory in my world to have at least a known good ECU and > distributor for self-rescue and testing. > > Of the Hall Senders I have seen that have failed one way or another ..... > it's been intermittent no-start cold, > or ....power loss, stumbling, and fialure to keep running steadily after > running a while. > > I had two distributors in a row do that , 1.9 ones.. > and each one took 3 hours of freeway driving before they acted up. > ( happened at the same place on I-5 three hrs north of where I am .. > a year apart...exact same thing with two different used distributors, > same van. ) > > New Hall Sender fixed it. > > It's nice to have another AFM too. > All I've seen those do is run 'unevenly' after many years. Subtle > unevenness ... > I did have one that would allow a 1/2 second cut-out at 60 mph, but that > was all. > > Scott > > On 11/14/2013 6:20 PM, Gregory Smith wrote: >> Heeeeeeeeelp! >> >> I am pulling my hair out trying to solve an ignition miss on my '88 GL. >> When it happens, the engine is warmed up and I'm usually just cruising >> along. The engine stutters and the tach dips and even goes up a bit >> sometimes. The fuel pump is good, quiet, filter is about 2 months old. >> >> Initially I suspected it needed and tune up and have replaced the plugs, >> cap, rotor, and wires using the appropriate parts from Bosch. The >> problem persisted so I replaced the ignition switch with a new one. >> >> The problem persisted... reading up on the symptoms I thought it might >> be "vanagon syndrome" so I swapped in a different AFM, still there. >> Added the proper capacitor to the AFM innards, still there. Unplugged >> the O2 sensor... still there. >> >> Any ideas? Does the hall sender in the distributor do this when it's >> failing? I think it's more of an on/off failure so I'm stumped. Thanks >> in advance. >> >> Gregory Smith >> '88 Vanagon GL >> '77 Lancia Scorpion >> Olympia, WA >> >> >


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