380SL throttle switch

[Traymore]

Hi all

I have been scouring every forum i can find to try and solve the issue with my 1984 380 SL.
The problem i am having is that once she has warmed up if the throttle pedal is pressed and released 9 times out of 10 she stalls, this also happens if the pedal is released whilst driving, to apply the brake for instance.
She is now off the road as it is quite scary to loose braking assistance and power steering whilst driving.
I have checked vacuum hoses, fuel pumps etc and whilst going through these checks i have found an electrical connector which is not plugged into anything.
I have traced the wire as best i can and it disappears under the inlet manifold at the front of the engine, my best guess is that it goes to the throttle position switch.
It makes sense in my head that this could cause the issues i am experiencing.
Can anybody help with information as to the location of the socket for this plug, i have searched for ages and found nothing.

Thanks in advance for any help.

 

[television]

I am not 100% on this but is not there only 1 throttle switch that switch from the idle to the main computer, if this plug was out it would be running on the fail safe high idle of about 1k rpm

 

[Traymore]

Hi television

I am not 100% on this being the throttle switch as every diagram i have found shows a 3 pin connector and this only has 2, but as all i can find are US diagrams and i am 99.9% sure the wire is attached to the sensor/switch on the side of the throttle body i am guessing the UK wiring is different.
I have just discovered the engine may have been replaced with one from a SE as the engine number is 116 963 12062800 could this explain it?

 

[television]

Let me do some checking on that engine number

 

[television]

Yes that engine is for a 126 380

For all the diagrams use this chart,it goes back to 1987 and it could throw up something, go to year then model the diagrams

http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1995/E320/SYSTEM WIRING DIAGRAMS/

 

[Traymore]

thank you very much

i will have a search through and see if anything looks familiar

 

[television]

I do have all the details of the injection systems for these cars, I will look through and see what had 2 pin connectors

 

[Traymore]

Hi television

Thanks for the help i'm quitin for the night.
I am going to try and trace the wiring from the idle control relay and see if i can work it back to the throttle switch connector in the morning, I will let you know how i get on.

 

[Traymore]

OK this just seems to get more confusing for me.
I have done some investigating today and found that none of the idle control wiring colours from any diagrams i can find match the pin outs on my idle unit.
I am now 100% sure the plug i have found disconnected is going to the throttle switch/sensor on the side of the throttle plate body.
I have also measured the resistances
Idle position =6.95Mohm
OT and WOT =>Meter can measure
seems this switch/sensor may be faulty but no point replacing it until i can work out where it plugs in.





I have attached some pics of the idle relay connector to identify each pins connected wire colour in the hope someone will know where i can find diagrams to match,







any help would be much appreciated