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fuel pump

Started by jorg, 20 November 2023, 10:31 AM

jorg

Hello,

I got a question and need some help to fix a to lpg converted w116 with engine code M 110.922. the car is bought a few month ago, and running great on lpg but it won't even start on petrol. I was looking for the fuel pump relay, but cannot find it with the regular locations given on the internet, so I need a more specific instruction for this type of engine. also I cannot find the fuelpump/sender, it is not near the rear axcle, or has this type a fuel pump inside the tank? Or is it common to remove the petrol system when converting to lpg?

I don't hear the fuel pump so that is my first clue

thanks for your help

Jorg

ptashek

Fuel pump relay is the one towards the windshield, inside the fuse box. The fuel pump + filter package is in the back, in front of the subframe, very easy to spot from underneath. I wouldn't expect an LPG car to have no fuel system at all - don't they typically use petrol to start, and only the switch to LPG?
1993 "Pearl Blue" W124 280TE
1988 "Arctic White" W124 200T
1979 "Icon Gold" W116 450SE

jorg

#2
well I thought that too, starting on petrol, and after the engine is warm on lpg, but this one also starts on lpg.
I added pictures let me know where I should see the relay and the pump.

jorg







ramiro

Hello,
According to your profile you have a 280S also in the pictures it is a w126 not a w116 , anyway the 280S (Carburator) has a mechanical fuel pump that is mounted to the engine block so you will not find an electric fuel pump or relay.
Ramiro

jorg

well that makes sense, I will check that futher, thanks.

Jorg

rumb

Whats going on with the additional rear springs?
'68 250S
'77 6.9 Euro
'91 300SE,
'98 SL500
'14 CLS550,
'16 AMG GTS

ramiro

I have similar ones on my 280se it is an aftermarket solution , here you can also see them in a german forum thread :
https://www.w126-forum.de/read.php?1,195186,195186

jorg

Quote from: ramiro on 21 November 2023, 05:31 AMHello,
According to your profile you have a 280S also in the pictures it is a w126 not a w116 , anyway the 280S (Carburator) has a mechanical fuel pump that is mounted to the engine block so you will not find an electric fuel pump or relay.
Ramiro

my registration says I got engine code M 110.922, I cannot find a clue that this engine code also is used for a w126
any Idea?


Jorg

ramiro

Yes 110.922 is for the 280s w116 , for the w126 it should be 110.924 but your pictures clearly show a w126 , maybe somebody swaped the engine , what year does your car have ?

jorg

it is a 1980.
where is the engine type plate located? I can check it, but probably wrong registered.

jorg

ramiro

There is no plate as far as i know, but there should be a number stamped into the top of the block where distributor is.