Matt,
I had problems like this with my AMG A2. The fuel
filter kept getting clogged (the one at the
carburetor) from some dirt in the tank.
The fuel filter on the carburetor is under capacity.
That is the problem. It is so fine of a mesh that it
clogs easily. Mine would jam up so tight with
particles that a fuel pressure gauge I had teed into
the line between the pump and the filter would
indicate pressure for quite a while with the engine
shut off. After sitting for maybe 15 minutes, enough
pressure would bleed off that the particles would drop
off the filter element and allow fuel flow again.
Start it up again, and the filter might clog again in
just a few minutes, or maybe not for an hour!
I placed an aftermarket clear plastic see through
paper element fuel filter in the line between the pump
and the carburetor filter. That filter eventually
clogged (after about 50 miles), but I kept spares in
the jeep so I just changed it and everything was fine
again after that.
With the fuel return system on the smog A2's, fuel
pressure should drop almost instantly to zero when you
shut the engine off. There is an orifice in the
carburetor that vents fuel back to the tank
continuously to keep enough fuel flowing through the
lines to preclude vapor lock. The high flow rate with
that system bleeding pressure off is what drags so
much garbage through the system so fast and clogs
things up.
You can confirm what I'm saying by teeing in a
pressure gauge as I've indicated between the
carburetor and the fuel filter for a couple of trips
around the block (or just idling).
It isn't the coil and it isn't the carburetor... I
replaced those on mine to no avail.
Brandon
--- Matt Mouser <webmaster@net-connection.net> wrote:
> Hi Guys,
>
> I have a very weird problem with my MUTT. When I
> first got it, not very long
> ago, it ran a bit rough and stalled on me when I
> drove it for a while. I
> found out the gas was old, I drained it and put in
> new gas. It made a huge
> difference and my MUTT runs smooth for the most part
> now. But now the only
> problem is it that it stalls. Once it stalls I can't
> get it started unless I
> let it sit for about 30min or so. Sometimes it will
> start right back up
> immediately but will die again a min later. I have
> changed all the fuel
> filters many times, blew out the gas lines with
> compressed air, and changed
> the fuel (already stated). Any other ideas on what
> may cause the MUTT to
> die.
>
> I was thinking it may be the coil. The one that's in
> there now looks brand
> new, so I don't think that's it. I think it's
> getting fuel because the last
> time it stalled I unhooked the fuel filter at the
> carb and gas came out of
> the carb and filter. Now I am thinking that the Carb
> may need to be rebuilt,
> but it too looks brand new. Does this problem sound
> familar? The engine in
> the MUTT looks brand new and only has 5000 miles on
> it. The problem on this
> engine is not consistant. The engine ran fine
> idleing on my driveway for
> over an hour. Then later that day I started it and
> it died within a minute
> and I couldn't start it again.
>
> Thanks for your time,
> Matt Mouser
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This archive was generated by hypermail 2b29 : Sun Sep 02 2001 - 11:15:42 PDT