Having a Mann oil filter will help prevent this.

John

On 2/25/2014 2:28 PM, Steven Shelton wrote:
> 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?
>>>
>>>
>>
>>
>