Mercedes-Benz Forum banner

Pictures of 82 380 SL fuel return line

7821 Views 16 Replies 6 Participants Last post by  Chris8 S
Did a search and came up empty. I have a 380 that has been sitting for a couple of years and does not want to stay running. At first it would run for a few miles then start sputering and very hard to keep it running.
What i have done.
pulled tank and cleaned
install new strainer in bottom of tank
fuel pump replaced by previous owner I can hear it running and did a pressure test of 100psi
replaced fuel filter. Alot of rust came out.

After doing these things it starts rough and idles then the pump starts moaning and it starts to die.

I know that 100 is too high so I am thinking the return line may be clogged. I dont know which line is the fuel line. POS Haynes manual is very vague.
1 - 3 of 17 Posts
Are you looking for the engine compartment end or the tank end of the return?

At the tank, the return line is the one that doesn't go to the pump assembly. Pretty obvious.

At the engine, a pic in the manual section 07.3-130 "Testing the Fuel Pump" shows where the return exits the fuel distributor.
1 - 3 of 17 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.