Date: Fri, 28 Dec 2007 18:53:08 -0800
Reply-To: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Subject: Re: Daily Update On My Injectors
In-Reply-To: <122920070021.15373.47759307000C47D600003C0D2215551724C9C9CDCB020E03020100@comcast.net>
Content-Type: text/plain; charset="us-ascii"
Try this :
Unplug the ecu. Energize the main relay, whether by turning on the key or
jumpering or hot wiring the main relay, or however.
Check 12 volts on one wire at each injector plug, with the plug not plugged
onto the injector, it should be at all 4 injector plugs. Put the plugs back
on the injectors.
Then find the pin at the ecu for each injector, and supply ground to each
pin, and listen for the pertinent injector to click. I forget if you are 1.9
or 2.1. I think 1.9. my Bentley for an 84 or 85 shows each injector has
it's own dedicated wire to the ecu.
This test proves that each injector gets 12 volts, that each injector can
at least click, and that the wire harness is able to supply the ground side
of circuit for each injector.
( did you even try just touching each injector to 12 volts, like on a
battery, like testing a light bulb ? - that would be a logical thing to
try, just like testing a light bulb on a battery with a couple of jumper
wires, and listen for them to click. )
But do that test above.
As far as ability to trigger the injectors goes , it tests the whole circuit
except the ecu.
Scott
www.turbovans.com
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Vdub Guy
Sent: Friday, December 28, 2007 4:21 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Daily Update On My Injectors
OK, <sigh>, today I obtained not one but 2 used ECU's, 6 used injectors, and
while I was at it got the entire wiring harness out of a 1.9 Vanagon. Both
ECU's give the same result as my other two. Now the 2 I got today were used
and unkown, but doubtful I have 4 bad ECU's. Thanks to those who pointed out
I was checking the fuel injectors incorrectly with my meter. Set at 1X I get
15-16 ohms. Now, I started dissecting the harness I got (damn sure less
complicated than the mountain of wiring I have in my basement from my Suby
donor!). From the ECU plug I found continuity between pin 7 and brown wire
with a white tracer ,which goes to the cluster of grounds on the head. I
assume pin 7 is ground to the ECU, as each injector shows one side to pin 7
(Bentley). I did NOT get continuity from any of the injector plugs to pin 7.
So, I head out to the Vanagon, unplug the ECU, I get continuity from pin 7
to the head. I also get continuity between one side of each injector plug
and pin 7. So, I
'm not sure what this proves, other than I have ground to pin 7 at the ECU,
but when i check the FI plugs on the engine, apparently no ground with
ignition on, engine cranking-test light doesn't flicker. Jeff
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