cold start injector

my cold start inctor is getting a permant feed when my engine is running??? anybody come across this b4?? so my engine wont actually run as its over fueling so i have to disconect it    after a few seconds to get the car running

The thermo time swith provides the earth for the 5th injector  
So it must be this that is faulty … Or the earth wire to it is trapped somewhere providing permanant power ……


 


The Cold Start Injector
To aid the starting of the engine an additional injector is located into the inlet manifold, this sprays fuel into the engine at systems pressure when the engine temperature is cold and the starter motor is activated. The length of time that this additional injector sprays is determined by the engine's temperature, seen by the thermo time switch.
The thermo time switch provides the earth path for the cold start injector via a heated bi-metalic strip, this heater is activated by a voltage from the starter motor. As the strip heats, over a period of approximately 8 to 10 seconds (when cranking only), the legs on the bi-metalic strip separate and the earth path is lost.
A warm engine will perhaps only require 2 seconds before the circuit is broken and a hot engine will already show open circuit. This simple circuit is to avoid the engine being flooded when cranking and the additional enrichment only given when essential.

Good luck……..