[W126 Coupe] no fuel flow

Iain Gunn igunn at bmts.com
Sun Jan 13 12:14:51 EST 2008

Did you get your fuel problem fixed?
----- Original Message -----
From: Markus Meyer
To: Mercedes Coupes Mailing Lists
Sent: Friday, January 11, 2008 9:05 PM
Subject: Re: [W126 Coupe] no fuel flow


fuel relay isn't in the car - that's why I jumpered pins 7&8 where the relay would plug in to eliminate that being bad...pumps run, still no fuel.

Markus Meyer
mfm at meyerprobateproperties.com
www.meyerprobateproperties.com
Meyer Probate & Properties, LLC
484-919-9762




-------- Original Message --------
Subject: Re: [W126 Coupe] no fuel flow
From: "Carl Hansen" <c.c.hansen at cogeco.ca>
Date: Fri, January 11, 2008 8:54 pm
To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>

I suspect you checked your fuel relay?

Carl H.


----- Original Message -----
From: "Dick Spellman" <spell.yy at verizon.net>
To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Friday, January 11, 2008 8:31 PM
Subject: Re: [W126 Coupe] no fuel flow


> forgot to mention check valve is identified as 32 in the diagram
>
> Markus Meyer wrote:
>> Actually now that I think of it, I believe the line from regulator to
>> fuel cooler is connected. But yes, I could still be sucking air, since
>> the engine was disconnected for a while in the car I got it out of, and
>> the lines in the car were disconnected as well. Maybe I should just hook
>> it all up and see what happens??
>>
>> Markus Meyer
>> mfm at meyerprobateproperties.com <mailto:mfm at meyerprobateproperties.com>
>> www.meyerprobateproperties.com <http://www.meyerprobateprope rties.com/>
>> Meyer Probate & Properties, LLC
>> 484-919-9762
>>
>>
>> -------- Original Message --------
>> Subject: Re: [W126 Coupe] no fuel flow
>> From: Dick Spellman <spell.yy at verizon.net>
>> Date: Fri, January 11, 2008 8:11 pm
>> To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
>>
>> Actually Markus. If the return line is open would you be sucking
>> air and
>> loosing the prime on the fuel pumps??? Never having tested with both
>> lines open, I have no way of knowing if this is what you dealing
>> with so
>> just a guess.
>>
>> Dick
&g t;>
>> Markus Meyer wrote:
>> > Hi Dick,
>> >
>> > I think you misread, or I didn't communicate well. The "toasted
>> > engine" is outta there. I put in another motor from KNOWN GOOD CAR
>> > that ran fine! I do NOT have the lines hooked up to the engine
>> yet, I
>> > am simply testing that fuel gets FROM the tank TO the fuel
>> > distributor. The supply line coming from the tank to the
>> distributor
>> > is hooked into a bottle for now. I thought the accumulator in the
>> > back by the pumps/filter is for warm starts. I thought running the
>> > pumps in constant on should cause fuel to flow. I am NOT trying to
>> > check starting the car yet, that's the next step. I wanted to make
>> > sure fuel was flowing first, since the car itself was an
>> unknown, but
>> > the engine is not. Make sense? So I am not trying to test pressures
>> > or any of that. I am just trying to make sure fuel flows from
>> pump to
>> > fuel distributor, which right now, it is not.
>> >
>> > Markus Meyer
>> > mfm at meyerprobateproperties.com <#Compose>
>> > <mailto:mfm at meyerprobatepropertie%0A%20s.com>
>> > www.meyerprobateproperties.com
>> <http://www.meyerprobateproperties.com/> &l
>> t;http://www.meyerprobateproperties.com/>
>> > Meyer Probate & Properties, LLC
>> > 484-919-9762
>> ; >
>> >
>> > -------- Original Message --------
>> > Subject: Re: [W126 Coupe] no fuel flow
>> > From: Dick Spellman <spell.yy at verizon.net <#Compose>>
>> > Date: Fri, January 11, 2008 7:29 pm
>> > To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com
>> <#Compose>>
>> >
>> > Hi Markus,
>> >
>> > Flow. You have a fuel regulator on the supply line before
>> > connecting to
>> > the fuel distributor. That's where I'd test for fuel flow. Also the
>> > return line and damper can be checked which if blocked would
>> restrict
>> > ; flow on the supply too. Disconnecting at the fuel regulator will
>> tell
>> > you if you have fuel.
>> >
>> > Markus you need a set of gauges for most the pressure tests. Read
>> > 07.3-120 and follow the steps. Given that the engine may have had
>> > excess fuel dumped in there I be sure check the pressures & cold
>> > start
>> > valve plus temp switch that drives this valve and hope the engine
>> > is not
>> > toast from r aw fuel mixing with the oil.
>> >
>> > Dick
>> > not a mech, just a diy'r remember
>> >
>> > Markus Meyer wrote:
>> > > I have an 89 560SEL I just finished transplanting an engine and
>> > trans
>> > > into. I know the motor is good, it came from a good working
>> car. As
>> > > a quick test, I wanted to verif y I had fuel coming out of the
>> fuel
>> > > line going into the fuel distributor. That line is what I stuck
>> > into
>> > > a bottle to do the test. Then, I jumpered pins 7&8 on the fuel
>> pump
>> > > relay, and no fuel.
>> > >
>> > > I tested voltage at each of the pumps (there are 2) and each read
>> > > about 10.5 volts. I also tested continuity on each pump, both
>> read
>> > > about 2 ohms. I can hear both pumps "buzzing/humming". I know
>> > > there's gas in the tank for two reasons - I added about 2-3
>> > gallons,
>> > > and just to make sure it made it to the first pump, I pulled the
>> > hose
>> > > from the tank to the pump off and fuel poured out. Also, when I
>> > got < BR>> the car, I was told the engine might be bad beca use
>> > "too much fuel"
>> > > was dumping into the engine, so I know there was flow at one
>> point!
>> > > ;
>> > > There doesn't seem to be an easy way to remove the "out" on each
>> > pump
>> > > one by one to test flow, considering the out on each pump is
>> > where the
>> > > wiring connections are, and I don't w ant fuel to pour onto the
>> > live wires!
>> > >
>> > > So what can I check/test? What could be the problem? I should be
>> > > getting fuel flow by doing this test, right? What the heck am I
>> > missing?
>> > >
>> > >
>> > > Markus Meyer
>> > > mfm at meyerprobateproperties.com <#Com pose> <#Compose>
>> > <mailto:mfm at meyerprobateproperties.com <#Compose> <#Compose>>
>> > > www.meyerprobateproperties.com
>> <http://www.meyerprobateproperties.com/>
>> > <http://www.meyerpro%0A%20bateproperties.com/
>> <http://www.meyerpro%0a%20bateproperties.com/>>
>> > <http://www.meyerprobateproperties.com/>
>> > > Meyer Probate & Properties, LLC
>> > &g t; 484-919-9762
>> > >
>> >
>> ------------------------------------------------------------------------
>> > >
>> > > The MB Coupes Website!
>> > > W126 SEC Mailing List
>> > > Postings remain property of MB Coupes, L.L.C.
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>> > The MB Coupes Website!
>> > W126 SEC Mailing List
>> > Postings remain property of MB Coupes, L.L.C.
>> >
>> >
>> ------------------------------------------------------------------------
>> >
>> > The MB Coupes Website!
>> > W126 SEC Mailing List
>> > Postings remain property of MB Coupes, L.L.C.
>>
>> The MB Coupes Website!
>> W126 SEC Mailing List
>> Postings remain property of MB Coupes, L.L.C.
>>
>> ---------------------------------------------------------------------- --
>>
>> The MB Coupes Website!
>> W126 SEC Mailing List
>> Postings remain property of MB Coupes, L.L.C.
>
> The MB Coupes Website!
> W126 SEC Mailing List
> Postings remain property of MB Coupes, L.L.C.

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