Check to see if your vent line is plugged... Either fighting to pull
the filler cap or hearing air go in.
I had an 84 sd that was taking on air until I blew out the vent line...
--
John W Reames
jwrea...@comcast.net
Home: +14106646986
Mobile: +14437915905
On Jun 11, 2010, at 14:05, Dieselhead <126die...@gmail.com> wrote:
A stream of bubbles in the clear filter only indicates an air leak
in the suction line. An air leak after the clear filter, in lines,
transfer pump, filter, IP, or return lines do not indicate by
bubbles in the clear filter. You can use the presence or absence of
bubbles to focus your efforts before, or after the prefilter. If
the hoses are old, OFTEN, there are multiple air leaks. If the
hoses are all less than 2-3 years old, it is likely to be a clamp
that is not tight.
It is a good idea to change all the fuel hoses every 5 years or so.
(yes the original hoses lasted 10-20 years.) I have not had MB
replacements last that long. FLAPS hose is usually good for 5 years.
I only use OE or OEM radiator hoses. They are still noticeably
better than any third party hoses.
Also note that the hand priming pump only moves fuel into the
injection
pump, NOT out the injection lines to the injectors. You operate the
priming pump about 50 to 70 times to prime the injection pump; you
will
know that it is primed when the noise changes and the pump action
firms
up.
How does the car run once you get it started? Can you reach top
speed
or does it lose power at highway speeds? Watch the clear in-line
filter
- is there a stream of bubbles entering?
-Max
-----Original Message-----
From: mercedes-boun...@okiebenz.com
[mailto:mercedes-boun...@okiebenz.com] On Behalf Of Dieselhead
Sent: Friday, June 11, 2010 12:58 PM
To: Mercedes Discussion List
Subject: Re: [MBZ] Hard start problem returns
Try bleeding the fuel system at the filter (Top bolt, or line out)
while
you pump the primer. It sounds like air is getting into the fuel
system
somewhere. A leak at the filter can cause a leak. Bad copper
seals in
the delivery valves can cause problems.
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