This is turning into a real nightmare.  I reinstalled the AFM; now it
starts fine, but the engine makes a loud clattering!  It's done this
occasionally over the years, but always went away pretty quickly.  Now it
won't stop.  I've gone over it with a stethoscope and it seems to be
loudest at the driver's side of the intake air distributor, but it's hard
to pinpoint.  I disconnected the fuel injector plugs and cranked the engine
to see if something was bouncing around in a cylinder, but heard nothing.
 Can all this be related?  It all started off with a shorted oil pressure
sensor wire.

On Tue, Feb 25, 2014 at 2:25 PM, Dennis Haynes <d23haynes57@hotmail.com>wrote:

> Intermittent problems are often elusive. Will it start reliably with the
> AFM
> disconnected? If yes then you do have a mixture control issue and the
> sensor
> being disconnected is helping get past it. I would look for massive vacuum
> leaks and wiring issues. Except for the O2 sensor which is a "consumable",
> it is very rare for any of the other sensors to go bad. Again, the
> connectors and wiring is more often the real problem.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Steven Shelton
> Sent: Tuesday, February 25, 2014 2:12 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Engine Starting Problem
>
> I meant that the engine turns over and over but it will not start/run.  I
> checked the intake air sensor (Bentley 1999 edition pg 24.28):
>
> 2-3        556
> 6-9        557
> 6-22      2697@18 degrees C
> 2-3 and 7-9:  ohms change as I moved the sensor plate
>
> Is this a definitive test or could there still be something wrong with
> intake air sensor?
>
>
> On Tue, Feb 25, 2014 at 1:59 PM, Dennis Haynes
> <d23haynes57@hotmail.com>wrote:
>
> > Cranking and starting are two completely different issues. The starter
> > will crank (turn)the engine over if you removed the complete fuel
> > delivery system and put it out to the garbage.
> > Check the wiring on the back of the starter. The solenoid trigger wire
> > may be loose and you're working near there is making or breaking that
> > connection.
> >
> > Dennis
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> > Behalf Of Steven Shelton
> > Sent: Tuesday, February 25, 2014 1:18 PM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Re: Engine Starting Problem
> >
> > OK, as I said above, the engine would not crank at all, even after
> > returning to it using a charged battery the next day.  As soon as i
> > removed the AFM, even with the #1 spark plug removed, the engine
> > cranked right up.
> >  I checked the ECU connector, with the following results:
> >
> > 2-7     3213 ohms@16 degrees C
> > at this temperature the reading should be 3000 ohm to 3500 ohm.
> > I also checked at the temp 2 sensor, it was 3178 ohm.
> >
> > Other readings were:
> > 1-7     10.64 V
> > 5-7      infinity
> > 6-19    558 ohm
> > 7-25      0 ohm
> > 11-7     14.9 ohm
> > 12-7     15.1
> > 14-6     3154 ohm
> > 15-19     555 ohm at rest, it moved up when I moved the plate
> >
> > Does this mean conclusively that the temp 2 sensor is OK?  Any
> > suggestions on what to try next?
> >
> >
>
>