I have never encountered a mechanical problem I could not figure out. I
have never encountered an electrical problem that I could : )

Guess that's why I love mechanical pump diesels. One wire to rule them...

Jim

On Wed, Nov 14, 2012 at 4:10 PM, Scott Daniel - Turbovans <
scottdaniel@turbovans.com> wrote:

>  that's what it takes ..
> thinking about it in detail ..
> as opposed to throwing parts at it.
>
> the more you understand the principles at play,
> the easier it is to fix 'em.
>
> the whole system is kinda simple and fun actually.
> Not very tricky or complicated once understood.
>
>
>
>
>  On 11/14/2012 1:29 PM, Jim Felder wrote:
>
> What I'm getting out of all these comments makes perfect sense, never
> thought about it in detail before... the O2 or Temp II sensors could be
> bad, but so could the wiring between the sensors and the ECU and the
> grounds. A poor connection at the plug, a poor connection in a ground, or a
> faulty wire could fool the ECU into thinking that it needed to enrich the
> mixture.
>
> Jim
>
> On Tue, Nov 13, 2012 at 9:16 PM, Scott Daniel - Turbovans <scottdaniel@turbovans.com> wrote:
>
>
>   high resistance in the ground side would be seen as the ECU has higher
> ohmage..
> which equates to richer mixture ..
> might want to check the resistance to ground on that ( probaby ) brown
> wire.
> on temp sensor II.
>
>
>  On 11/13/2012 6:45 PM, James Felder wrote:
>
> Thanks, Dennis. This all makes sense.
>
> Jim
>
>
>
> On Nov 13, 2012, at 8:23 PM, Dennis Haynes <d23haynes57@hotmail.com> <d23haynes57@hotmail.com> <d23haynes57@hotmail.com> <d23haynes57@hotmail.com> wrote:
>
>
>  If you quickly reset the ignition does it clear up for a little while? If so
> the problem is in the o2 sensor wiring. If not then look at temp 2 sensor.
> The temps 2 sensor rarely goes bad but the plug connection to it is a real
> problem. Most sensor replacements actually are fixed by the
> disconnect-reconnect action cleaning the contacts. One side of the temp 2
> sensor goes to a ground point. Any high resistance in the wiring is an issue
> especially with this sensor being shared with the idle speed controller.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com <vanagon@gerry.vanagon.com> <vanagon@gerry.vanagon.com> <vanagon@gerry.vanagon.com>] On Behalf Of
> Jim Felder
> Sent: Tuesday, November 13, 2012 9:38 AM
> To: vanagon@GERRY.VANAGON.COM
>
> Subject: 2.1 strange running before and after head gasket repair
>
> Not that anyone has been following this, but my daughter let the engine get
> overheated on my 91 2.1 when the Temp II sensor retaining clip broke and
> immediately emptied coolant. The head gaskets leaked and the thermostat
> housing was warped, primarily, but I had some other troubles along the way
> like a cylinder frozen to one of the heads.
>
> Anyway, I made a mistake by letting a wire get caught under the driver side
> rubber gasket, which cases coolant to pool on top of the cylinder. I can
> take care of that. The engine, though, is exhibiting symptoms that I thought
> I would ask about.
>
> It was doing the same things before the overheating and gasket issues, so I
> anticipate some troubleshooting will be in order when I get the gasket leak
> repaired. Before I found the head gasket leak, I was able to run it to warm
> and then drive it for three or four miles, so I can observe that the post op
> problems are the same as the pre-op problems with the exception that the
> effects of the leaks, except for the mistake on the DS rubber gasket, are
> fixed.
>
> Here's what's going on: when I start the car, it runs great. It just purrs
> strongly and steadily, until it gets warmish and then it begins stumbling
> and issuing some black exhaust like it's running rich. If you let it idle,
> especially with it in drive and there's that little bit of extra drag, it
> will stall. It does the same thing with the O2 sensor plugged in or
> unplugged.
>
> Any ideas?
>
> Jim
>
>
>
>
>
>
>