1986 SL420 - Starts but Stalls

Simon Van Damme

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Your Mercedes
1986 SL420
Hi ! Car has been in the shop for a month now - so any help would be appreciated

Day after passing the MOT
the car starts, but doesn't idle and stalls ( view video )

Mechanic has
- replaced the sparks, and coils
- check vacuum hoses
- new Fuel Pump
- replaces Fuel pump relay

"said when he connect the fuel pump directly with a battery it is running fine,But when the fuel pump goes through the car's system it stop working.That means it should be a electric fault which he needs time to trace the problem...

appreciate any direction from someone that has experienced similar issue ( or where to look! )

thank you !
 

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