[W126 Coupe] no fuel flow

[Carl Hansen]

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.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>

>>     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

>>

>>     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 verify 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 because

>>     > "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 <#Compose> <#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

>>     > > 484-919-9762

>>     > >

>>     >

>>     ------------------------------------------------------------------------

>>     > >

>>     > > 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.

>

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.