One other thought -- a jug of gas with a hose in it, pump some fuel from
there? Here again I am assuming the fuel pump sucks the gas and is
somewhere near the engine.
Take your fire extinguisher.
-R
On 7/21/14 6:02 PM, Rich Thomas via Mercedes wrote:
Maybe the hose is all buggered and is collapsing when fuel is pumped
through it (here I am assuming the pump is sucking it from the tank)
or has crap in it from sitting so long. The filter aspect would also
be a good place to start. How hard would it be to get a mity-vac on a
fuel line and see if you can pump some (sucking?) from the tank? Take
along some generic fuel line, run it from the tank vicinity to the
fuel pump and see if you can bypass the line? It most definitely
sounds like a fuel starvation issue of some sort. I had a lawnmower
do that, ended up cleaning the whole fuel system and carb to get it to
run right.
I wonder too if the tank has gotten rusty from sitting in a humid
environment, using crap ethanol fuel, etc. and that has clogged the
filter?
--R (no expert on Benz vergassers)
On 7/21/14 5:37 PM, Dan Penoff via Mercedes wrote:
Finally heard back from the owner. Here's what he tells me:
He got the car from the original owner. It had been parked for a
couple of years after being run out of fuel. Wouldn't start or run
when he got it.
He replaced the fuel pump and filter and put fresh fuel in the tank.
Fuel pump builds up pressure and turns off. Car will start and idle,
but when you attempt to drive (load) the engine, it dies.
He thinks the fuel strainer may be clogged up, but isn't interested
in putting any more time into it. He says the hose from the strainer
to the pump looks a little rough, and he's wondering if there might
be some air leaks there. He got the car from the original owner
either for free or very little from what I can tell, so it has just
been a project to tinker with. He doesn't know MBs and seems obsessed
about the original owner paying "more than $60,000 for it new in 1984!!"
This does not seem to be an effort to pump up the price, just some
sort of awe that a car would have cost that much in the day.
I was going to run over to Harbor Freight and pick up a fuel pressure
tester, but theirs says it doesn't work on Bosch or CIS-Jetronic. Is
this the case?
http://www.harborfreight.com/fuel-injection-pump-tester-92699.html
It definitely sounds like a fuel delivery issue, as he says as they
have tinkered with it there have been times when it could be driven
at 20-30 MPH without a problem, then after being parked for a day it
wouldn't do more than idle, that is, when loaded it would stumble and
miss. I'm still going to take a jumper for the fuel pump relay, but
I don't think that's the issue.
Interior is said to be very good, with the stitching on the top of
the back seat coming loose (nothing new there) and the exterior
having a nickel-sized spot of rust bubble in front of the passenger
side rear wheel well.
Let's hear those ideas, guys! I nee some direction so I'll know what
to look for when I get up there tomorrow night!
Thanks!
Dan
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