I would do the pin test in the Bentley for the injection wiring harness and
be sure that the crimp connections are good at the very least use an meter
to determine if the wires do not have any resistance. The threads in the
head are the least of you concerns for a good connection to the head make
sure the flat surfaces are good and clean and use a new bolt.
a sealant like a white lith grease might slow the corrosive process. never
use an anti seize compound on the ground bolt threads at the head  this
could interfere with the computers reading the signals correctly

Bob Donalds
Boston Engine

----- Original Message -----
From: "Tim Marciniak" <tmarciniak@WI.RR.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, February 07, 2005 8:23 AM
Subject: Cleaning bad grounds

> Having had some starting and idle problems with my van I am going
> through and cleaning all the ground connections in the van.  Does
> anyone have a sure fire method for cleaning the threaded bolt holes
> were the ground screws go in.  I tried rolling up some emery cloth and
> just turing that in the hole but i cant see that that works very well.
> maybe running a threading tap might help but then there is the risk of
> crossing threads.  Any got any other methods.
>
> Tim
> 1990 Multivan
>