Date:         Sun, 1 Mar 2015 15:47:47 -0700
Reply-To:     OlRivrRat <OlRivrRat@COMCAST.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         OlRivrRat <OlRivrRat@COMCAST.NET>
Subject:      Re: 87 2.1 dies after 30 seconds
Comments: To: Kevin Duvernay <kduvey@GMAIL.COM>
In-Reply-To:  <CAHQe0n7E9YYsQMzUAo9mPa8fVK5PkrqoAKAsF3k8857h4OzCYQ@mail.gmail.com>
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               Kevin

       Well I think You are HeadedInTheRightDirection ~ Glad to hear that it is running ~ But ~

That HeavyishGreenWire is the O2Snsr SignalWire ~ The O2Snsr GroundWire is Smaller&Brown ~

                                                                       ORR ~ DeanB

                        A Correction & More

        I should have referred to the BrownWire as the O2Snsr ReferenceGroundWire & It can be found

by looking @ the HallSnsr Connection on the Distributer & Following those ConnectedWires Back to 

where they Emerge from a ProtectiveSleeve ~ There You ShouldFind a BrownWire that will either be

connected to the IntakePlenum or the Eng'Block ~ That is the Wire that NeedsToHave a VeryNiceClean

ConnectionToGround ~


On 1 Mar , 2015, at 2:53 PM, Kevin Duvernay wrote:

> ding ding ding and the inner is: Mark.
> 
> Thank you Mark. It was in fact the O2 sensor ground wire (green slightly
> larger gauge wire). Someone had mistakenly plugged it into the unused spade
> connector on the bottom of the coil because it was just sitting there
> unplugged while the O2 sensor was out. Unplugged it from the coil and it
> runs beautifully now. The new O2 sensor also seems to have solved the
> running rich problem.
> 
> Should have consulted the list before spending many hours swapping out so
> many parts...
> 
> On Fri, Feb 27, 2015 at 5:05 PM, mark drillock <mdrillock@cox.net> wrote:
> 
>> This sounds like it could be related to the oxygen sensor circuit. When
>> the engine is cold the ECU ignores the O2 sensor. Once the engine warms up
>> to a certain point the ECU then tries to use the O2 sensor reading as a
>> basis for adjusting the fuel mixture. It has a lot of leeway in trying to
>> adjust it and can easily adjust it so far that the engine stops running.
>> When you turn the key off and then start the engine again the ECU again
>> ignores the O2 sensor but only briefly. So with an already warmed up engine
>> restarting clears the O2 sensor circuit for a short while each time. With a
>> cold engine the O2 circuit is inactive until the engine warms up.
>> 
>> If it is related to the O2 sensor circuit it could be the sensor, the
>> wiring to the sensor, or the reference ground wire the ECU uses when trying
>> to read the sensor. The reference ground wire is the brown wire that comes
>> out of the small bundle that goes to the distributor connector. People see
>> this brown wire and assume it has to do with the distributor but no, it is
>> for the ECU O2 circuit. It needs to connect to engine metal and needs a
>> clean connection and no other ground wires should share that connection.
>> 
>> Mark
>> 
>> Kevin Duvernay wrote:
>> 
>>> I do have a spare brand new temp II sensor, we'll try tossing it in. easy
>>> enough. I suppose it make sense, it actually does seem to run good for
>>> several more minutes if its started cold...?
>>> 
>>> On Fri, Feb 27, 2015 at 4:28 PM, Jim Felder <jim.felder@gmail.com> wrote:
>>> 
>>> 
>>>>