Date: Mon, 25 Jul 2011 11:59:40 -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: Strange Catastrophic Failure - Not
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'Catastrophic failure' means it blew itself to smithereens...
or something of that order.
you're having a running issue.
Hardly catastrophic.
Funny how people love to dramatize it , evidently.
the idea of clogged cat is good thinking.
that's a drastic difference between the lowest cylinder and the highest..
95 versus 165.
that fuel pressure is way off.
start there.
vacuum leaks seldom make much noise.
would be good to have a spare known good MAP sensor to try.
you have to check your fuel filter once in a while.
Surprised anyone would keep driving their van knowing fuel pressure is half
of what it should be,
unless the requirements for Haltech are different than stock.
I won't post the definition of 'catastrophe' .
Maybe it's an 'officially weird day.'
----- Original Message -----
From: "Max Wellhouse" <dimwittedmoose@CFU.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, July 25, 2011 1:29 AM
Subject: Strange Catastrophic Failure
> Drove my 90 GL w/248k on the ODO(Boston Bob rebuild at130k) to work
> last week with no problems. 1 hours later when I try to start it to
> go home, it did start sorta, but wouldn't build up RPMs and was
> running WAY rich. Checked compression and had the following 1-165
> 2- 135, 3 -95, and 4- 135. Don't think that's the major problem,
> though. Towed it home and still haven't figured out the
> problem. Since this engine has an old school Haltech engine
> management system on it instead of the Digifant, many of the usual
> Vanagon issues might not apply here. I unplugged the O-2 Sensor and
> there was no improvement.It acts like there's some sort of
> restriction in the exhaust system, but how could it run fine, get
> shut down, and then later in the day not hardly run at all? I was
> going to remove the Cat and see if it was clogged up, but thought I'd
> check the other stuff first. The Haltech System is like 10 years
> old, so maybe something like the Throttle Position Sensor might be
> bad?? It runs off of a 1 bar MAP sensor. I've checked for vacuum
> leaks, but something this bad you would think you'd be hearing the
> hissing if a hose were off or worn through somewhere. I should try
> and start it again and see what the vacuum gauge is reading.
>
> Could it be something as simple as the fuel pump/filter? I pulled a
> fuel line off the other night and got spritzed with the pressure from
> the line, so I don't think it's a lack of fuel pressure. The fuel
> pressure gauge has been reading low for over a month now(like 15-20
> PSI rather than the 29-36 range), but that hasn't stopped it from
> running. normally. FP Regulator toast???
>
> Any suggestions would be welcome at this point!!!
>
>
> TIA
>
> DM&FS
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