It is original engine as far as I know, ~123K.  (I have only had it about
two years.)  I have replaced all vacuum lines, including the big ones on
the intake/runners.  New FI seals (as part of the fuel line replacement
job),  new AFM, new FPR....   When I was measuring the vacuum, I  pulled
off the distributor advance line and  measured it there.  Ideally, you
should check it with the distributor and FPR intact?  I believe there is
something to this Boston Bob zero lash business.  I will report back in a
few more days.  I am driving the camper to work this week to monitor the
lifter noise and performance.
                                                        Jay

"Scott G. Terry" <sgterry@ENGINEERING.UCSB.EDU> on 08/20/2001 01:30:04 PM

Please respond to "Scott G. Terry" <sgterry@ENGINEERING.UCSB.EDU>

To:   vanagon@GERRY.VANAGON.COM
cc:    (bcc: Jay L Snyder/AE/DuPont)
Subject:  Re: do we have a vacuum leak?

Jay,
OK, 15" of vacuum at idle!  Your Westy is now King/Queen of manifold vacuum
until someone can top that.
How many miles on your engine?  Original valve guides?
This is in line with the result of my experiment that I posted last
Thurs/Friday: in order for the fuel pressure regulator to give 28 psi at
the fuel line test tee you need 15" manifold vacuum (1.9L engine).
I connected my gauge to the same place you did when measuring vacuum.
Connecting the gauge to other locations didn't affect my measurements.
Scott Terry
'85 Westy "Pearl"
Santa Barbara, CA
>I am getting 15" at idle.  I adjusted my valves over the weekend as per
>Boston Bob's procedure.  Excellent so far.  Quiet valves and more power.
>Also, cold starts are much improved.  I backed off the adjusters to 0
lash,
>and just tightened ~1/4 turn.  I think most of the fuel pressure problems
>are vacuum related.  I would suggest replacing the FPR if it is still the
>original piece (10 to 20 years old).  I teed the vacuum guage in at the
>distributor/FPR line.  Is this where everyone is measuring it?
>                                                        Jay '85 Westy