Date: Tue, 12 Apr 2005 08:27:20 -0700
Reply-To: gary hradek <hradek@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: gary hradek <hradek@YAHOO.COM>
Subject: Re: vanagon Digest - 11 Apr 2005 (#2005-300)
Content-Type: text/plain; charset=us-ascii
Leo,
Not likely to be the exhaust. Might want to do a
compression check with and without the muffler in
place.
Also check to see that the fuel line has pressure
after it sit overnight.
gary
Date: Mon, 11 Apr 2005 20:30:20 -0700
From: Leo Lee <leo0365@SBCGLOBAL.NET>
Subject: New head replacement, bad gas mileage...
It took me over a month to finish replacing the new
heads. No major
problem, just broke a head stud and I have to replace
both lower center
studs. I have also replace a new set of hydraulic
lifters. Everything
went well, I readjust the valve half turn further IN
after the stop. The
engine run well after that. Coolant temperature was
right over the first
150 miles test drive, gas mileage appeared to be fine,
and power/speed
on the highway was no problem. Then this past weekend,
I made the
second long distance drive on a camping trip, I drove
a total of about 210
miles. I then noticed an obvious lack of power, even
on a very mild
uphill. I also notice the gas level going down a lot
faster than it used to
be. The gas mileage was about 15-16 mpg. The vanagon
start well, idling
fine and smooth. I smell a little gas when start cold
for a short ride
but did not find any trace of gas leak. I notice a
little engine
vibration but I thought this vanagon engine was always
like that. I check the
O2 senser, I replaced that about 6,000 miles ago,
connection and
everything looks fine. I remember I detached the
exhause pipe behind the
catalytic converter to remove the pipes from the
cylinder heads, I found
no gasket in between the joint in front of the
converter, and I locked
it back the same way it was, no new gasket. But now I
found that the
joint between the pipe and the converter indeed need a
gasket for the 1991
model. Would that cause a mixture problem in the fuel
injection system
if an exhaust leak occur at this point? Also, I was
replacing the tail
pipe, all three rusted bolts broke and I have to drill
holes through
the remaining bolts, while involved some occassional
hammering at the end
of the muffler. Would that be reason to cause the old
muffler loosen
some debris and partially block the mufflers or
catalytic convertor?
Other then these, I think I did a pretty good job in
putting the fuel
injector system, flow meter and other things back to
where they were, and
the
air filter is new. I wellcome any suggestion to this
problem.
Leo 1991 multivan 120,000miles
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