Hi,
I'm experiencing cold starting woes having recently brought this car back off a SORN.
The car is a 200E Auto with M102.963 engine, KE/EZL management, 1992 vintage.
By the thermostat housing I have three temperature sensors; i) with a single green wire that goes to the dashboard, ii) with two black/minor colours that drives the electro-magnetic fan, and; iii) with four wires that concerns me because it's round and could be fitted any one of four ways.
The plug has terminals numbered 1 - 4 and is keyed but the sensor is not numbered and is not keyed. The wire sets are 2 green with minor colour that I believe feed the KE/EZL and a brown and brown/white pair. Pulling the plug off when the engine's running cold does impact performance butt there's no way for me to test whether the plug is fitted to the correct terminals.
There's also an electronic injector (black/pink and brown wires) that I believe is called a Cold Start Valve and fed by the fuel pump relay under given circumstances. I can see the brown cable runs to earth but there's no supply and removing the connector when the engine's running cold has no impact on performance.
The OVP has power to terminals 15 and 30 and is supplying <14v to four wires corresponding to 87 terminals, one of which goes to the ABS and another to an Idle Speed Controller. I do not now where the other two leads go. Removing the connector from the ISC when the engine's running cold does impact performance.
Does anyone have any idea which other circuits are drive by OVP 87 terminals and what the intended behaviour of the cold start injector is and how it can be tested t eliminate faults with it or elsewhere in the system?
Thanks/Jules
I'm experiencing cold starting woes having recently brought this car back off a SORN.
The car is a 200E Auto with M102.963 engine, KE/EZL management, 1992 vintage.
By the thermostat housing I have three temperature sensors; i) with a single green wire that goes to the dashboard, ii) with two black/minor colours that drives the electro-magnetic fan, and; iii) with four wires that concerns me because it's round and could be fitted any one of four ways.
The plug has terminals numbered 1 - 4 and is keyed but the sensor is not numbered and is not keyed. The wire sets are 2 green with minor colour that I believe feed the KE/EZL and a brown and brown/white pair. Pulling the plug off when the engine's running cold does impact performance butt there's no way for me to test whether the plug is fitted to the correct terminals.
There's also an electronic injector (black/pink and brown wires) that I believe is called a Cold Start Valve and fed by the fuel pump relay under given circumstances. I can see the brown cable runs to earth but there's no supply and removing the connector when the engine's running cold has no impact on performance.
The OVP has power to terminals 15 and 30 and is supplying <14v to four wires corresponding to 87 terminals, one of which goes to the ABS and another to an Idle Speed Controller. I do not now where the other two leads go. Removing the connector from the ISC when the engine's running cold does impact performance.
Does anyone have any idea which other circuits are drive by OVP 87 terminals and what the intended behaviour of the cold start injector is and how it can be tested t eliminate faults with it or elsewhere in the system?
Thanks/Jules
