[radalbano]

Hello everyone asking for your help for my 1993 320CE coupe M104.992 Engine

Engine stalls while idling and hard acceleration. Parts were replaced already:
Throttle body
Cam sensor
Maf sensor
VVT adjusting gear
Fuel filter
Fuel injectors
Spark plugs

Thank you 🙏

 

[radalbano]

Harness was replaced also by the previous owner (delphi)

 

[LogicalPosition]

What is the mileage on the vehicle?

It may be a loss of fuel pressure causing these symptoms.
At some point the fuel pump and accumulator will need replacing.

 

[radalbano]

Around 158,000km mileage

Before buying a new one i've tested 2 surplus fuel pumps nothing changed. Do you think its fuel shortage?

 

[khomer2]

Tested with known good oem OVP?

 

[LogicalPosition]

Air, fuel, spark...
Sounds like fuel issues to me.
You might have bad plug wires or cap and rotor, distributor issues, as well.

 

[sbaert]

I don't see coils or spark plug cables. The ENTIRE ignition system (3 coils, 3 spark plug cables, and 6 spark plugs) are disposable with a very finite lifetime.

And the ONLY proper spark plug for that engine is Bosch F8DC4 and nothing else. Ditto on only using Bosch coils.

 

[radalbano]

Tested with known good oem OVP?

Forgot to mention replaced it with a brand new ovp relay

 

[radalbano]

Air, fuel, spark...
Sounds like fuel issues to me.
You might have bad plug wires or cap and rotor, distributor issues, as well.

Mine is the m104 efi version already

 

[radalbano]

I don't see coils or spark plug cables. The ENTIRE ignition system (3 coils, 3 spark plug cables, and 6 spark plugs) are disposable with a very finite lifetime.

And the ONLY proper spark plug for that engine is Bosch F8DC4 and nothing else. Ditto on only using Bosch coils.

2 of the coilpacks were replaced already. Brand new 3 high tension wires but the spark plugs i installed was NGK brand