Hi group,

I subscribe to a technician's list and this has been kicking around for a
couple of days.  Thought that you all might be interested.  It also
illustrates the power of the net.

Jim Arnott

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>_______________________________________________________
>
>Greetings Techs!,
>
>        Ahhh.. it feels good when you put a 600$ plus part in and it works! :)
>
>        Thanx Greg Caron! Greg hit it pretty much right on the head. And thanx
>Jim Arnott!  for the valuable information he sent,  and thanx to others
>that responded with other excellent checks.   I'd *thought* I'd checked
>the injectors ok with my noid light, but, (Yep, Hehehe) after getting
>Greg's message I thought I'd try measuring the pulse width on crank.
>None!.  (Guess that's what I get for doing my own thinking at times. :)
>To make a long story short,  I pulled an injector bank,  and had a
>helper crank it,  and my, my,  we have a solid "powerfull" stream of
>fuel here! <Howl!>  ECU was grounding the injectors wide open.  Replaced
>ECU, and she started right up.  What I'm gathering why this happened
>when the customer ran out of gas,  was the shiny new battery in the
>van,  that I later find out needed a jump start after extended
>cranking,  so I assume somehow he knocked out the ecu. I'm still a bit
>leary on the air flow meter,  with the resistence changes,  but customer
>is happy with what he's got so we'll see him later on that.  Also,
>Changed the oil,  and let the muffler dry out.  Got so bad it eventually
>came running out the tail pipe! <Howl!>.  Jeez,  think I might have a
>clue about then huh? :)  Thanx a million guys.  Sure hope to pay back
>the help.  Have a great one.  Thanx Brent!
>
>Rick Walton - Cmat, L1
>Precision Automotive
>Tacoma, Wa.
>
><--- ORIGINAL POST:--->
>Greetings techs,  and Happy Holidays!
>
>Hoping one of you fine VW Men might be able to steer me in the proper
>direction here.  1987 Vw Vanagon with the Digifant (Bosch Afc) Gas
>Injection System.
>Vehicle was brought in on the hook with a no start.  Customer said he
>ran out of gas with it,  and put a couple of gallons in,  but didn't
>help.
>
>What's happening is the engine is flooding big time.  After a short
>crank time (5 to 10 sec) pull the plugs and they are soaked.
>
>Remove Inj. Connectors and will run fine on propane.
>Fuel pressure - Ok
>Coolant temp good. - 4200ohms at 45degrees
>Throttle valve switch - Ok.
>Injector resistence good on all 4 - 15.8 to 15.9 ohms.
>Intake air temp sensor - Ok.
>Power good to all injectors and will pulse noid night on crank.
>
>The air flow meter is what I'm a bit confused with.  Mitchell isn't
>reall clear on the testing of it,  and I just don't work on enough of
>these beasties to know what is good and what isn't.  Resistence between
>pins 1 & 2 with flapper closed is 4.0k Ohms,  and as flapper is opened
>resistence starts moving up slowly and at 1/4 open is about 6.01K, now
>as it moves farther is drops to under 5.0K then starts back up with full
>open at 4.56K Ohms.  This can't be right can it?  Is there a proper way
>to test this?
>
>Could I also have another problem that I'm not checking?
>
>Any suggestions or comments are much appreciated.
>
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