Help! Car died

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Jun 18, 2020 | 06:39 PM

Edvards

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Joined: Jun 2020

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1991 300SE w140

Help! Car died

Hello!

So was cruising this night and BAM! engine surged and RPM slowly went down, when it completely died. Tried to start - cranks, no start. Fuel pump buzz is present (replaced one of two pumps with PIEBURG unit 2 weeks ago). After 5 mins of sitting starts fine and goes. After driving 500 meters dies again... left the car in forest and drove home, was really angry. Where should I look? Throttle body, throttle cable? Fuel injection problems?

I must note, that when this all started, it smelled pretty heavy of unburned gas. Maybe such a little thing as spark plugs?

And about wiring which is dodgy on these cars - it has been changed (mechanic said so). And no codes were present at diagnostic 2 weeks ago...

Thanks in advance.

M104.990 engine 1991 w140
722.368 trans

Jun 18, 2020 | 10:19 PM

chassis

Out Of Control!!

Joined: Sep 2018

Posts: 14,671

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From: unbegrenzt

2017 GLE350 4MATIC

Fuel, spark and air. What diagnostic work have you done?

Battery
Coil/ignition pack
Spark plug wires
Spark plug

Fuel pump
Fuel in the tank
Fuel injectors

Cam and crank sensors

Throttle plate and sensor
AIr flow sensor
Air filter