Date: Tue, 1 Nov 2011 20:16:37 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: No start/ Yes spark II
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
hi ..
re
"NOID did not light up on ignition test' ..
you probably meant to write 'signal to the injectors test' ..not ignition.
those are different things of course.
here's what I do if I have a won't-run due to fuel pump not running.
I just power up the fuel pump ...
jumpering at the fp relay socket works very nicely.
You can even just drag another battery under the van and connect it with
jumper wires right to the fuel pump.
( the polarity on the fuel pump is hard to see ..the marks are small ...but
they are there. )
THEN .....if that gets you a running van ..
you know all you have to work on is the lack of signal to the fuel pump.
if making the fuel pump run 'manually' doesn't make it run .
then work on fuel delivery, fuel filter, consdier restricted fuel tank etc.
Study the wiring diagrams.
It's in there ..
'key on '15' voltage from the igntion switch is an ECU input, I'm pretty
sure.
I forget right now if ECU gets power from the main relay ..
usually the main relay powers up .....
power to each of the four injectors ...
oxygen sensor heater circuit if it's a 2.1 ..
oh .....here's a weird thing about the Bentley manual wiring diagrams some
people don't know, and helps nicely to make the confusing and harder to use.
If you follow a wire and it goes to a box with a number in it ...
this is fun...
look straight down at the bottom of the page and see what current track that
number is above.
Say it's a 12 in a little box...
look straight down and see what current track that box is on...say it's
current track 25..
then go to current track 12 and look for a '25' in a box straight above the
12 that identifes that current track. Those two boxes are connected
electrically.
maddening really ..
but when yuou understand that little odd thing...then you can follow how
power gets to the ecu , for example.
Having the Bentley manual is more or less required if one is going to fix
one's own vanagon.
scott
www.turbovans.com
----- Original Message -----
From: "George Laubach" <skiplaubach@COMCAST.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, November 01, 2011 7:43 PM
Subject: Re: No start/ Yes spark II
You're only as good as your last zero-ing of your multimeter. Mine (and me)
was/were out of whack by 22 ohms. Now it's zero-ed/zed-ed? Thanks Mark for
identifying my ignorance, and with such grace...
I just now took Alistar's keen advice and jiggled my fuse box, but no such
luck, no sound from down under.
I'm going to get a new ignition switch per the long-shot advice by Zoltan
(cheap/good to have as spare).
I keep going back and forth thinking it's an ECU gone bad. How/from where
does the ECU get power? Remember, normal highway driving at 60 mph and
suddenly, without warning the engine stops and I coast to a stop. Spark at
plug wire but no fuel pump,etc. And the NOID did not light up on ignition
test. And all the rest.
Thanks,
Skip
84 Westy 1.9L
Sent from my iPad
On Nov 1, 2011, at 8:28 PM, mark drillock <mdrillock@cox.net> wrote:
> Any time you are using a meter to check for continuity, namely zero ohms,
> it is standard practice to often touch the 2 probe tips together first to
> see what that reads and thus make sure the meter is set correctly and
> reading correctly. It should be very close to zero and if it is you use
> that as "zero". 22 ohms is not close enough to zero.
>
> The ECU runs the FP relay by providing a ground when needed on pin 86 of
> the relay socket. The ECU runs the injectors, by providing a ground to the
> 4 wires that go to one side of each injector. The ECU can't provide a good
> ground to those other things if it doesn't have a good ground itself. It
> also needs good power. And it has to be good itself.
>
> Mark
>
>
>
> George Laubach wrote:
>> Thank you for your continued counsel.
>>
>> '84 Westy 1.9L
>>
>> So I bought the NOID at my local FLAPS. No light at the first FI I
>> tested. Hmm...
>>
>> I retested pins 7& 25 for ground and I would like to suggest that I've
>> had ground all along. Here me this: when I connect 7& 25 my ohmmeter
>> reads 22 ohms. When connect 7 alone and then to ground, or 25 to ground,
>> or ground to ground I get 22 ohms. So maybe my ohmmeter (or more likely
>> me) is not reading/doing things correctly. Anyway, I checked my grounds
>> thoroughly and I think my grounds are well grounded.
>>
>> So I'm somewhat back to square one. No FP at start. No NOID light at
>> start. The FP relay 30/87 is not being powered. Pin 85 on the FP relay
>> has voltage.
>>
>> Any other ideas before I call for a tow?
>>
>>
