Date:         Mon, 28 Sep 2009 12:58:03 -0400
Reply-To:     TJ Hemrick <x53gunner@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         TJ Hemrick <x53gunner@GMAIL.COM>
Subject:      No injector spray pattern
Content-Type: text/plain; charset=ISO-8859-1

Rocket,
  I realize it was discussed previously, in fact, it was less than a week
ago.  Previously, it was unknown why the van was not running as it had fuel,
spark, air.  Turns out, fuel stopped at the injectors.  I should have
figured that out sooner but I was pretty frustrated and started playing
"swap-tronics" instead of troubleshooting.  Now that we cracked that nut, I
pulled both banks of injectors and I do NOT have a spray pattern.  They're
BONE dry.  THAT is the problem.  I should have started at the Injectors and
worked backwards from there but I assumed (incorrectly) it was the
pump/filter.  Well, we all know what happens when we "assume" so I bear the
responsibility on that one.  I already payed the price in extra work so my
dues are done.  As per Ken Wilford, I'm going to swap the distributor and
see if the hall sensor is the issue since it's the trigger for the ECU.  Not
much else to check as I've been through every ground and connection in the
back end of that van, all the fuses, relays, and anything else I could
unhook, clean, and reconnect.  On top of that, I've already replaced the
fuel pump, ECU, and filter as a double check.  Why, at this point, the
injectors are dry is the issue.

TJ

Date:    Mon, 28 Sep 2009 06:40:16 -0700
From:    Rocket J Squirrel <camping.elliott@GMAIL.COM>
Subject: Re: Fuel injection trouble
What Mike S said. The pulses that drive the injectors are too brief for
your basic meter to capture and display. You'd need a fancier "peak hold"
meter or oscilloscope to properly measure them.
What you're seeing suggests that the injectors are being driven, confirm
by checking for spray, as Mike S suggests. The subject was discussed here
less than a week ago, and some procedural and safety tips were mentioned.
--
Mike "Rocket J Squirrel" Elliott
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
Bend, OR
KG6RCR


 Date:    Mon, 28 Sep 2009 09:11:43 -0400
From:    Mike S <mikes@FLATSURFACE.COM>
Subject: Re: Fuel injection trouble
At 08:24 AM 9/28/2009, TJ Hemrick wrote...
>  I'm not getting any fuel out of the injectors but definitely have
> good
>clean fuel in the lines.  I had some help and found the injectors were
>getting voltage but it's incredibly low.  It peaks at 4 volts and
>within two
>revolutions, it holds at 2-3 volts max.
If you're just using a simple multimeter to measure the voltage, that
sounds correct. The injectors are pulsed, so even if they get full
voltage when pulsed on, the meter will average the voltage down. You
would need an oscilloscope to see the actual drive voltage.
Pull the injectors on one side, and check the spray pattern.
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