R107 280sl
 

Hi,
I have a idling problem with this car. Appreciate if someone can give some advice.

The car starts easily and idles at 800 RPM. I think it should idle higher than 1000 RPM until the engine warms up when it will run at idle setting. It drives well without any problem until I stop the car and restarted it later. The engine cranks and reached 800 RPM and quickly dropped down to 500 RPM and alooks like it is going to die To prevent the engine from dying I press the accelerator and increase the RPM to about 1200. While maintaining this speed I could hear the engine is struggling to keep this RPM. When I realease the pedal the RPM fell to 500 and spiral down further until it dies.

I have so far changed the following parts -
Ignition Distributor
Spark plugs (old spark plugs in clean condition)
Warm Up Regulator
Decel Air Circulating Valve
Fuel Accumulator
Fuel Filter
Combustion Chamber clean with additive

Appreciate if someone can advice what is causing this problem.

Victorccb

how long does it faulter after you restart it? does it act like it's flooded then clears up after a few seconds? injectors can cause that.

Sounds like you have checked many things, but I see no mention of the air cleaner. It may be dirty or otherwise obstructed. This would explain many of the problems. I can't tell from your email whether it restarts easily. Might look and listen for vacuum leaks or
fuel filter in need of replacement. I usually check the DIY stuff first.

Idle
 

Have you checked all vacuum lines? With it at steady idle, spray some carb cleaner around the vac lines. If the idle increases, you have a vac leak.
Also could be a faulty idle control.