Date:         Tue, 5 Jan 1999 17:10:33 -0800
Reply-To:     David Raistrick <keen@POLARIS.DIGITAL-GALAXY.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Raistrick <keen@POLARIS.DIGITAL-GALAXY.NET>
Subject:      82 Update, found the problem!
Content-Type: TEXT/PLAIN; charset=US-ASCII

Hey folks.

Sunday I manged to work on the 82 again. (Saturday I had planned onit, but
it was raining some real nasty rain...and cold.  Sunday warmed up to
~60:)

Lots of troubleshooting, including a conference with Jim (OldVolksHome).

Joel had sent me some scans of the CORRECTdual relay cirtuitry, out of one
of his books.  I started with that, trying to figure out what wasnt
working.  Gave up.   Well, no, not quite.  Tore the AFM apart, cleaned all
its contacts, (fuelpump was not always coming on when the flap was
opened. The contacts in the AFM for the pump had ~80 ohms resistance, so I
figured....) reinstalled.  Had a screwdriver hold the AFM open, while I
checked for various problems.

Happened to thump the dual relay once, and vrrr! the pump started running.
Hmm.  Tap. Stoped.  Tap. Ran.  Hmm!

Yanked it out, and started trying to find a local source.  No luck.
During this time, I was opening the relay...

Called Jim, chatted with him a while about the problems.  He pulled out
one of his books, (later version of the Bently) which didnt just refer you
to "AFC Troubleshooting guid #...." like mine did..

We went over some of the troubleshooting tips, sinc my injectors were not
getting a pulse to fire.  (At which point MY book pointed me to the AFC
guide...)  First thing to check was (Federal, btw) if voltage was getting
to the center pin of the harness that plugs into the series resistor.

No voltage?  Bad relay.

Back into the relay.  Start checking resistors, traces, solder joints.
Nothing.  So I start checking resitence of the complete circuits. .  WHAT?
1.6 Mohms across 88z to 88a!!!! (with the relay closed, manually)

Whoooooa.  To compare, check the other internal relay, with it closed.
0.04 ohms..  Ok.  Check again. Hmm.  solder on the connection from the
relay's immobile point to the trace o n the PCB looks sorta flaky.  Pulg
in the soldering iron, continue looking.  Test front point to pin, its
fine.  Point to spare, fine also.  Not the joint.  Ok.  Check point to
movable point.  Whoa.  1.6 Mohms again!

Toasted.  Considered pulling another relay apart, and replacing the unit,
but decided againt it.  Soldered a jumperwire onto the immobile point's
lug, and had it so I could manually jump the relay.

Installed, had my brother run the key.  Key on, jump the relay,
start...Vrrrr.  Immediately kicked to life, like any good FI should.  A
little rough, since the lifters are collapsed (or so it sounds).  But ran.
Idled, reved., idled.  Shut it back off, since the AFM wsnt attached to
the filter housing..

Called Jim, had him ship me a new one. With luck, it'll be hre this week
sometime, and I can finish it this weekend.  Yay.


later...david



--
David Raistrick  '69 Westy-Ichigo
keen@finally.atlasta.net
                 '82 Westy-Maxine (Mom's)
                 '66 SO-44 Westy (It runs! I drove it!) in Augusta Ga