I second the Hall Sender as the culprit. Swap with a known good one to test. Got a friend with a Vanagon?

Chris.

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Dnia May 11, 2012 o godz. 18:04 Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM> napisał(a):

> Hi,
> I have read that the tests in Bentley on a Hall Sender are not that
> definitive.
> 
> I like to have 5 good reasons to change a part ...like want to be sure
> it's really needed ..
> on this one 2.1 waterboxer though ..
> we just had to go with new Hall Sender finally ..and that was it.
> 
> scott
> www.turbovans.com
> 
> On 5/10/2012 10:54 PM, Robert Fisher wrote:
>> Thanks, I'll try that. I've been leery of the hall sender since the phantom
>> no spark episode a while back... It tested out ok according to the tips and
>> tricks that I gleaned from the list, but I've wondered about it all along.
>> I have no idea how old it is. I have another one that I can try if it
>> warrants it. I'll do the troubleshooting according to Hoyle tomorrow and
>> see what that gets me. I just jumped to the pump since it obviously wasn't
>> functioning normally in situ.
>> 
>> On Thu, May 10, 2012 at 9:44 PM, Scott Daniel - Turbovans<
>> scottdaniel@turbovans.com>  wrote:
>> 
>>>  here is a very nice super simple fuel pump 'power to it' trick.
>>> requires only one tool..
>>> a small screw driver or even a paper clip.
>>> 
>>> don't even need the keys for the van.
>>> this is to run the fuel pump ..
>>> downstream of all relays and switches that control it.
>>> as a test.
>>> 
>>> open rear hatch,
>>> remove engine cover lid
>>> remove cover from relay box on left side.
>>> the Fuel Pump relay is the right one.
>>> ( heck ..a body could use this trick to pump old gas out of a parts van
>>> say ..before that gas gets too old ) .
>>> 
>>> jump, with your small screw driver the top wire and the very bottom wire .
>>> ( this routes Batt voltage on the red wire, to the double white wire on
>>> the bottom ) .
>>> 
>>> if that makes your FP run ...and your fuel pump  doesn't run  otherwise
>>> when it should ..
>>> you can figure the fuel pump , the wires, and its ground are working.
>>> 
>>> on one 2.1 waterboxer  I dealt with ..
>>> intermittent no-start.
>>> you could also drive it 9 miles with no problems..
>>> but then ..intermittently ......wouldn't fire up, no ignition.
>>> 
>>> that one turned out to be a Hall Sender in the distributor.
>>> New one of those fixed it very nicely.
>>> 
>>> scott
>>> www.turbovans.com
>>> 
>>> On 5/10/2012 7:53 PM, Robert Fisher wrote:
>>> 
>>> Here we go again. Van had been running normally for a while after fixing
>>> (?) my no-spark issue. Then (much later) it began to have little
>>> hesitations; a very brief, but seemingly complete loss of power while
>>> driving. It never killed the engine- sometimes it didn't happen at all,
>>> sometimes it happened a lot. This kept up over several tanks of gas. It
>>> usually only happened after the first mile of driving if it was cold, but
>>> once or twice happened almost immediately after taking off. We couldn't
>>> work out a consistent pattern. If anything it seemed to happen the most
>>> when driving on a north/south road. Go figure.
>>> 
>>> I ran it with and without the O2 sensor, no change. I checked a bunch (but
>>> not all) of the wires and grounds. Nothing obvious jumped out. Eventually
>>> it tapered off and just quit doing it; neither of us has noticed it for
>>> more than ten days. This is my only daily driver at the moment so it's hard
>>> to get any decent block of time to troubleshoot.
>>> 
>>> Well I have all the time I can find now 'cause it stopped running again. My
>>> wife drove my daughter to school at oh-dark-thirty for a field trip; the
>>> van ran absolutely normally. When she got back in it to come home, it
>>> cranked but wouldn't start. When I got to the van I looked it over for the
>>> usual suspects I didn't see anything obvious so I tried to start it. I
>>> immediately noticed the lack of 'buzz' from the fuel pump. No vibration at
>>> all when the key is turned to first position or when cranking. Put the
>>> meter on it and got no voltage, so we dragged it home.
>>> 
>>> I pulled the pump and put 12v to it. It spun up, no unusual noises or other
>>> noticeable issues. I ran it in reverse for a few seconds just for GP, all
>>> seemed well so I put it back in. On having my wife crank the van there was
>>> no voltage again with the key in first position, but I got 10.~ volts when
>>> cranking. However the pump didn't feel like it was running and of course
>>> the van didn't start.
>>> 
>>> I'm going to go through the Bentley and try some of the tips in this thread
>>> tomorrow; I'm just running out of daylight now and I wanted to get this
>>> written down before I forgot something.
>>> 
>>> Anything jump to anyone's mind for when I get back on it?
>>> 
>>> TIA,
>>> 
>>> Cya,
>>> 
>>> Robert
>>> 
>>> '87&  '86 2.1/Auto GLs
>>> 
>>> 
>>> 
>> 
>> --
>> Cya,
>> Robert
>> 
>> '87&  '86 2.1/Auto GLs
>>