ok I have had some trouble with the fuel system, first I had very little reading on my gauges, found a weak fuel pump, replaced both pumps and got a perfect reading/ 5.4 and 5.0, but now I am not getting any flow from the top of FD.

Which year/car is this on?

I wonder if you've got a clog somewhere between the pumps and FD? Can you back trace the fuel lines and see where you do and do not have fuel?

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Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

still working on the 91 190E 2.6 I have gone from two new F Pumps and check the fuel accumulator it is good, as i said we have 5.4 and 5.0 on upper and lower chambers yet not getting fuel to the injectors i have removed several lines from the top of the FD no flow, So i am thinking of the FPR I have pulled the line and had fuel pressure between the FD and the FPR no leakage at the vacuum side, so i have full flow to the fd. I am just a little confused.

Attached Thumbnails

     

Hmm if you have full flow into the FD but not out of then I would hazard a guess that your FD is clogged up somehow. Can you try opening each of the output lines? Are all of them dry?

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

While the engine is cranking, are you pressing down on the plate to get fuel to the injectors? Does the plate move freely?

__________________

1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

I found that depressing the intake plate did send fuel to the injectors, trouble is i had it pushed down almost all the way. I had an extra coil so i changed it and i replaced the fuel regulator from my 420, no improvement. Adjustments to the fuel mixture tower dose not give fuel threw the injectors, only depressing the flapper valve will do that. Now this tells me that the fuel body is out of adjustment but for the life of me I cant figure out how that could be!

I am fairly certain that the M116 and M103 fuel pressure regulators are NOT compatible.

The only fuel body adjustment that I am aware of is the EHA.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

well I guess I better see if i can get one off ebay or the used parts forum.
EHA is the setting needed to get the .4 bar differential. top and bottom. then the tower adjustments set the 0+or minus. I know how all of that works. Yet to have lost all fuel and spark at one time has me very frustrated, I am going to re-install the original parts except for the coil. will keep posting as i go along.

the units are left 0 438 161 013 DR 0003
the unit on right 0 438 161 001 DR 0001
One is from my 420 sel and the 190E 2.6
Any one who might know please chime in, thanks.

Attached Thumbnails

   

Bosch 04 38 161 001 - Fuel Pressure Regulator is for M103 - 190E 2.6
Bosch 04 38 161 013 - Fuel Pressure Regulator is for M116 - 420SEL

In MB world they carry different part numbers as well:

Click images to enlarge.





The M103 and M116/7 operate at different pressures:

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

thank you james for the list of values they do answer my questions.

The intake plate being deflected 5mm should take you from zero to 60mph quickly.

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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Keep something in mind. In another post you say the plugs only fire one time for each cylinder and then the firing stops. If the ignition is not firing, the fuel pump(s) won't run either. I am beginning to think you have an ECU or EZL problem. I may be wrong (if I am, please let me know) but I believe the EZL will fire for 1 revolution and then the ECU takes over and tells the EZL when to fire or that it is OK to fire.
It has been a while since I have worked on one of these systems but I would start by checking for codes in the ECU to see if it is responsive.
Also, I seem to remember reading that the ECU can turn the fuel off for deceleration to conserve fuel and lower emissions. Maybe it will also turn fuel off if the ignition is not firing to keep the engine from getting flooded.
All of the above is just to get members thinking about other things that can be causing these symptoms.

PaulM

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84 500 SEL (307,xxx miles)

Glad to hear from you, yes it is true that the plugs only fire once and that is when you first try to crank the engine. now I hooked up my fuel gauge's today and wanted to see if the pumps are running in the cranking of the engine and they are. the fuel pressure stayed up. I am in the processes of trying to test the coil. I must say it is curious the way it all developed at once.

today i took the fd off of the intake body, I found no broken parts. so i thought perhaps the fuel rod might be out of adjustment with the roller on the arm of the plate. I need to find out the adjustment measurements between the two,I know you have to back off the jam nut and reset the screw for depth of plunger but what is the gap measurement?